OakJava7 Advanced Samples

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Sample 28: OAKJAVA7(JAVA7.0) Security

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Oakjava7 Security

Oakjava7 provides high security when compared to all the programming languages

We can see this medium security in detail, which is invented at year 2020.

Write a Scroll java7 program maintaining security for the next page:-

j7prog.java7

<JAVA7>

public <CLASS> j7prog {

<MAIN>

{

HTML.displayhtml("Registermem.html");

}

Registermem.html

<html>

<tr> <h2><td><a href="#chapter1"> Enter your Details </a></td></h2></tr>

<tr>

<td><p>Enter Your Name: <input type="text" name="name" size="25" /></td></p></tr>

<tr><td><p>Enter your Username : <input type="text" name="uname" size="15"/></td></p></tr>

<tr><td><p>Enter the password : <input type="password" name="password" size="25" /></td></p></tr>

<tr><td><p>Choose your state : <input type="text" name="state" size="15"/></td></p></tr>

<tr><td><p>Choose your Country : <input type="text" name="country" size="15"/></td></p></tr>

<tr><td><p>Enter the password : <input type="password" name="spwd" size="25" /></td></p></tr>

<tr><td><p>Enter your secret password text : <input type="text" name="stext" sixe="15"/></td></p></tr>

<tr><td><p>Enter your family details : <input type="text" name="familydet" size="25" /></td></p></tr>

<tr><td><p> Enter Percentage of marks scored <input type="text" name="Indent" sixe="5"/></td></p></tr>

<tr><td><p>Enter Your Favourite subject <input type="text" name="CIndent" size="15"/></td></p></tr>

<td><h2><a href="#chapter2">REGISTER</a></td></h2></tr>

<div>

</div>

</form>

</body>

</html>

Explanation:

We found that form action =="http://localhost:9000/Jquerytest7.exe"

This Jquerytest7.exe is generated by Jquerytest7.java7

We will look more brief about Jquerytest7.java7 in next chapters.

So when we run the Scroll server then a scroll webpage is generated

which is given below in the screenshot..

So when we submit the data at j7prog.java7 form it will goes to another url which is

http://localhost:9000/Jquerytest7.exe. It will display the webpage as

invalid username. which are given below in the screenshot..

So inorder to provide medium security for the

oakjava7 webpage , you must enter the security details

at scroll.txt, which is the configuration file

for Oakjava7 security. But <- this backward arrow indicates

for eg) nosniff is assigned to X-Content-Type-Options.

Once you run the scroll server , oakjava7 security is

enabled because you enter security details in

scroll.txt configuration file.

scroll.txt

X-Content-Type-Options <- nosniff

Strict-Transport-Security <- max-age=31536000 ; includeSubDomains

X-Frame-Options <- SAMEORIGIN

X-XSS-Protection <- 1; mode=block

Content-Security-Policy <- default-src 'self' 'unsafe-inline' http://localhost:8082/

Explanation

So when you inspect the http://localhost:9000/Jquerytest7.exe form

you will get the output, which is given below....

Note:

This is about medium security. But it is free for the oakjava7 developers to focus. But Oakjava7 has advanced security that will be mention in Enterprise edition and not at professional edition.

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Sample 29: OAKJAVA7(JAVA7.0) Logs

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About OakJava7 Logs

In Oakjava7(JAVA7.0) when your application faces any error, it is

updated in <Filename>Oj7.log. All default logs are stored in

C:\ojava7\Ojava7log\ directory. For example ojindex1.java7

is the oakjava7 program when it is compiled and deployed

in Scroll server , if Oakjava7 program contains errors

and when you stop the Scroll server it will update the errors in file

ojindex1Oj7.log found in C:\ojava7\Ojava7log\ directory.

Let Us see the Log Example....

We create a Oakjava7 program it will retrieve the contents of Html contains

forms. But we did not include the html name correctly ie) at file ojindex1.java7.

Which is given below...

ojindex1.java7

<JAVA7>

public <CLASS> ojindex1 {

<MAIN>

{

//invalid filename wRegiter87.html

HTML.displayhtml("wRegister87.html");

}

Explanation

So when the errors come it will display in oakjava7 webpage

and in Logs file. So the Log file contains...

ojindex1Oj7.log

================

May 11, 2023 8:02:31 PM RuntimeExec logOutput

INFO: Oakjava7(JAVA7.0) Log messages

May 11, 2023 8:02:31 PM RuntimeExec logMessage

INFO: Exception in thread "main" Invalid Statements.lang.NullPointerException at HTML.retrieve(HTML.Invalid Statements:28) at HTML.displayhtml(HTML.Invalid Statements:256) at ojindex1.main(ojindex1.Invalid Statements:1) at Invalid Statements.lang.reflect.Method.invoke(Method.Invalid Statements:597) at cli.Starter.Main(Unknown Source)

This NullPointerException indicates that the HTML file is not found.

So when the errors come it will display it in ojindex1.java7, because this

ojindex1.java7 contain errors. So advantages of Oakjava7 logs is

we can history of errors that can be used for future reference , that we

meet the same error. So Logs are userfriendly for us. See the output

for oakjava7 file -> ojindex1.java7 which is given below..if you type the url

http://localhost:9000/ojindex1.java7 it will show the errors in ojindex1.java7

which is given below...

Error Page (ojindex1.java7) Output:

The database file or folder wRegister87.html could not be found! Could not find file 'C:\wilmixjeminfiles\sprogramfiles\jrrr\scrollserver\scroll\wRegister87.html'.Exception in thread "main" Invalid Statements.lang.NullPointerException at HTML.retrieve(HTML.Invalid Statements:28) at HTML.displayhtml(HTML.Invalid Statements:256) at ojindex1.main(ojindex1.Invalid Statements:1) at Invalid Statements.lang.reflect.Method.invoke(Method.Invalid Statements:597) at cli.Starter.Main(Unknown Source)

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SAMPLE 30 : DELEGATE IN OAKJAVA7

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DELEGATE

OakJava7(JAVA7.0) delegates are similar to pointers to functions, in C or C++. A delegate is a reference type variable that holds the reference to a method. The reference can be changed at runtime.

Declaring Delegates

Delegate declaration determines the methods that can be referenced by the delegate. A delegate can refer to a method, which has the same signature as that of the delegate. In given below syntax @D is the Delegate.

Syntax for Delegate

@D <return type> <delegate-name> <parameter list>

delegate is represented as @D

Instantiating Delegates

Once a delegate type is declared, a delegate object must be created with the new keyword and be associated with a particular method. When creating a delegate, the argument passed to the new expression is written similar to a method call, but without the arguments to the method.

Following example demonstrates declaration, instantiation, and use of a delegate that can be used to reference methods that take an integer parameter and returns an integer value.

Delegateexample1.web

<WEB>

@D int Delegatenochange(int n);

<PACK> DelegateApp1 {

<CLASS> TestDelegate {

static int num = 10;

public static int AddNum(int p) {

num += p;

return num;

}

public static int MultNum(int q) {

num *= q;

return num;

}

public static int DivideNum(int r) {

num /= r;

return num;

}

public static int getNum() {

return num;

}

public void main()

{

//create delegate instances

Delegatenochange noc1 = new Delegatenochange(AddNum);

Delegatenochange noc2 = new Delegatenochange(MultNum);

Delegatenochange noc3 = new Delegatenochange(DivideNum);

//calling the methods using the delegate objects

noc1(25);

<PRINTLN>("Value of Num: {0}", getNum());

noc2(5);

<PRINTLN>("Value of Num: {0}", getNum());

noc3(10);

<PRINTLN>("Value of Num: {0}", getNum());

Console.ReadKey();

}

Explanation

Using @D int Delegatenochange(int n); we create a delegate for

a method. It means we can pass method as parameters.

consider the example it is given below...

//num value is assigned to 10

static int num = 10;

public static int AddNum(int p) {

num += p;

return num;

}

After that we are creating Delegate instance ie)

Delegatenochange noc1 = new Delegatenochange(AddNum);

Once you have created it ,then pass the value as a parameter to delegate instance eg) noc1(25).

So 10+25 => 35, here 10 is the num value and 25 is the parameter value passed to AddNum method using Delegate, so we get the output as 35. Similarly you do as a exercises for the rest of the them.

Output

Value of Num: 35

Value of Num: 175

Value of Num: 17

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SAMPLE 31 : PREDICATE and Predicate with DELEGATE in OakJava7

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Predicate and Predicate with Delegate in OakJava7

Predicate is represented as @P

Predicate is the delegate like Func and Action delegates. It represents a method containing a set of criteria and checks whether the passed parameter meets those criteria. A predicate delegate methods must take one input parameter and return a boolean - true or false.

The Predicate delegate is defined in the Oakjava7 Package(namespace) , as shown below:

Predicate signature

public @D bool @P <in T>(T obj);

Same as other delegate types, Predicate can also be used with any method, anonymous method, or lambda expression.

j7Pr8.web

<WEB>

<PACK> j7Prsample2

{

<CLASS> J7Pr8

{

public void main()

{

@P < string > CheckIfNokia = @D(string modelName) {

if (modelName == "Nokia") return true;

else return false;

};

bool result = CheckIfNokia("Nokia");

if (result) <PRINTLN>("Nokia is a olden cellphone");

}

Explanation

For this given example..

@P < string > CheckIfNokia = @D(string modelName) {

if (modelName == "Nokia") return true;

else return false;

};

Here @P is the predicate and @D is the delegate. Predicate represents a method containing a set of criteria ( eg) if modelName=Nokia or not) and check whether the passed parameter meets those criteria.

eg) bool result = CheckIfNokia("Nokia");

if (result) <PRINTLN>("Nokia is a olden cellphone"). For this oakjava7 program it displays Nokia is a olden cellphone. Because the given modelName parameter value is equal to "Nokia".

Output

Nokia is a olden cellphone

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Sample 32: Predicate and Delegate examples

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Question: Find the Factorial , Sin,Exp, value of the given expression ie) y,y1

and asinh,acosh ,atanh,String using delegate

and Count no of Books,Count no of Negative numbers,Count no of empty book title

and find factorial (0! to 9!) and 6! (6 factorial) ?

j7Pr111.web

<WEB>

<PACK> j7rsample112

{

public <CLASS> J7r111

{

static int Factorial(int n)

{

return n < 1 ? 1 : n * Factorial(n - 1);

}

static Func<int, int> Factorial()

{

Func<int, int> factorial = null;

factorial = n => n < 1 ? 1 : n * factorial(n - 1);

return factorial;

}

public static int Count<T>(T[] arr, @P <T> condition)

{

int counter = 0;

for (int i = 0; i < arr.Length; i++)

if (condition(arr[i]))

counter++;

return counter;

}

public void main()

{

Func<double, double> f1 = Math.Sin;

Func<double, double> f2 = Math.Exp;

double y = f1(2) + f2(3); //y=sin(2) + exp(3)

f2 = f1;

y = f2(9); //y=sin(9)

<PRINTLN>("fx result1="+y);

Func<double, double> f4 = @D (double x1) { return 8*x1+1; };

double y1 = f4(3);

f4 = x1 => 32*x1+1;

y1 = f4(6);

<PRINTLN>("fx result2 with @D ="+y1);

Func<double, double> asinh1 = @D (double x1) { return Math.Log( x1 + Math.Sqrt(x1*x1+1) );} ;

Func<double, double> acosh1 = x => Math.Log( x + Math.Sqrt(x*x-1) ) ;

Func<double, double> atanh1 = x2 => 0.2*( Math.Log( 1 + x2 ) - Math.Log( 1 -x2 ) ) ;

double y5 = asinh1(3);

double y6 = acosh1(4);

double y7 = atanh1(0.6);

<PRINTLN>("asinh with @D ="+y5);

<PRINTLN>("acosh with @D ="+y6);

<PRINTLN>("atanh with @D ="+y7);

@P <string> longWords = @D (string word) { return word.Length < 10; };

bool y8 = longWords("Madam");

string[] words = {"Madam","jackie",""};

int[] books = {456,789};

int book=0;

<PRINTLN>("String with @D ="+y8);

int Names = Count(words, longWords);

<PRINTLN>("Count names="+Names);

book = Count(books, @D (int ip) { return ip > 20; });

<PRINTLN>("Count no of Books="+book);

int[] numbers = {-1,-45,1,4,100,-200,-20000,567};

int NegativeNumbers = Count(numbers, x => x < 0);

<PRINTLN>("NegativeNumbers count="+NegativeNumbers);

int EmptyBookTitles = Count(words, String.IsNullOrEmpty);

<PRINTLN>("Empty book title count="+EmptyBookTitles);

var fl = Factorial();

for(int i=0; i<10; i++)

<PRINTLN>("{0}! = {1}", i, fl(i));

int[] numbers1 = new[] { 5,1,3,7,2,6,4};

Func<int, int> factorial = @D (int num) {

Func<int, int> locFactorial = null;

locFactorial = n => n == 1 ? 1 : n * locFactorial(n - 1);

return locFactorial(num);

};

int s=factorial(6);

<PRINTLN>("Factorial Result ="+ s);

}

Explanation

Now here we are adding data 256 and "Bill" to the ArrayList

ArrayList list <NEW> ArrayList();

list.Add(256); // boxing

list.Add("Bill");

and it will print [256,Bill] as output.

==============================================

object o = 1010;

int i = (int)o; //performs unboxing

<PRINTLN>("UnBoxing result ="+i);

we know that the process of converting a Reference Type variable into a Value Type variable. This can be done by casting, eg) (int) of object instance o. ie) int i=(int)o; This gives a Unboxing value which is stored in variable i.

=========================================================================

Func<double, double> f4 = @D (double x1) { return 8*x1+1; };

double y1 = f4(3);

f4 = x1 => 32*x1+1;

y1 = f4(6);

So when you use y1=f4(6), that means

6 is assigned to x1 , ie) 32 *6 +1=> 193

=============================================================

Here in this given statement

@P <string> longWords = @D (string word) { return word.Length < 10; };

bool y8 = longWords("Madam");

The "Madam" string is passed to LongWords method , it

will check when word.Length < 10 or not. If it is

less than 10 then return the boolean value as true.

==========================================================

simillarly when longwords = madam is passed at Count

(words,longwords) when the Word.length < 10 then the

counter value gets incremented ie) in this sample ....

string[] words = {"Madam","jackie",""};

here "madam" string length is 5 , jackie=6 , ""=0

which are less than 10 ; so the counter value becomes 3.

int Names = Count(words, longWords);

so we get the output Count names=3

==========================================================

books = {456,789}

book = Count(books, @D (int ip) { return ip > 20; });

<PRINTLN>("Count no of Books="+book);

here we see in the given above statement that

456 > 20, 789> 20 ; So the counter value =2.

so we get the output Count no of Books=2.

==============================================================

int[] numbers = {-1,-45,1,4,100,-200,-20000,567};

int NegativeNumbers = Count(numbers, x => x < 0);

<PRINTLN>("NegativeNumbers count="+NegativeNumbers);

here in this given above statement integer numbers array

is passed which contain 4 positive numbers.we have passed

predicate condition as x => x < 0 in the count function.

This conditions will check all the numbers in the numbers array.

so there are 4 positive numbers in that numbers array

so the counter is incremented 4 times.so we get the

output NegativeNumbers count=4.

==============================================================

int EmptyBookTitles = Count(words, String.IsNullOrEmpty);

here the words array contain 2 elements and 1 empty string

so when we pass String.IsNullOrEmpty in Count function

this match with the 3rd element that is 1 empty string

present in words array. So the counter is incremented 1

time.so we get the output Empty book title count=1

===============================================================

var fl = Factorial();

for(int i=0; i<10; i++)

<PRINTLN>("{0}! = {1}", i, fl(i));

This i represent ith element ie from ( 0 to 9)

f1(i) =>f1(0),f1(1),f1(2),f1(3),f1(4),f1(5),f1(6),f1(7),f1(8),f1(9)

Here f1 is the factorial function, For loop is repeated 10 times

from (0 to 9).

So we get the output as given below

0! = 1

1! = 1

2! = 2

3! = 6

4! = 24

5! = 120

6! = 720

7! = 5040

8! = 40320

9! = 362880

====================================================================

We are finding the factorial of 6 ie) 6!

int s=factorial(6);

<PRINTLN>("Factorial Result ="+ s);

when we pass the value 6 to factorial recursion function.

it will multiply the value = 6 *5 * 4* 3* 2 * 1 = 720.

eg)

static int Factorial(int n)

{

return n < 1 ? 1 : n * Factorial(n - 1);

}

until n < 1 the recursion take place.

So we get the output as given below

Factorial Result =720

====================================================

Output

fx result1=0.412118485241757

fx result2 with delegate =193

asinh with delegate =1.81844645923207

acosh with delegate =2.06343706889556

atanh with delegate =0.277258872223978

String with delegate =True

Count names=3

Count no of Books=2

NegativeNumbers count=4

Empty book title count=1

0! = 1

1! = 1

2! = 2

3! = 6

4! = 24

5! = 120

6! = 720

7! = 5040

8! = 40320

9! = 362880

Factorial Result =720

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Sample 33 : AutoBoxing and UnBoxing

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Boxing In OAKJAVA7

The process of converting a Value Type variable (char, int etc.) to a Reference Type variable (object) is called Boxing.

Boxing is an implicit conversion process in which object type (super type) is used.

Value Type variables are always stored in Stack memory, while Reference Type variables are stored in Heap memory.

UnBoxing in OAKJAVA7

The process of converting a Reference Type variable into a Value Type variable is known as Unboxing. It is an explicit conversion process.

J7Pr10.web

<WEB>

// Load oakjava7 util package.

<PACK> j7Prsample10

{

<CLASS> J7Pr10

{

//Boxing in Oakjava7

public void main()

{

ArrayList list <NEW> ArrayList();

list.Add(256); // boxing

list.Add("Bill");

<PRINTLN>("Boxing result ="+list);

object o = 1010;

int i = (int)o; //performs unboxing

<PRINTLN>("UnBoxing result ="+i);

}

Explanation

Now here we are adding data 256 and "Bill" to the ArrayList

ArrayList list <NEW> ArrayList();

list.Add(256); // boxing

list.Add("Bill");

and it will print [256,Bill] as output.

object o = 1010;

int i = (int)o; //performs unboxing

<PRINTLN>("UnBoxing result ="+i);

we know that the process of converting a Reference Type variable into a Value Type variable. This

can be done by casting, eg) (int) of object instance o.

ie) int i=(int)o; This gives a Unboxing value which is stored in variable i.

Output:

Boxing result =[256, Bill]

UnBoxing result =1010

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Sample 34:Lambdaj7 in Oakjava7

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What is Lambdaj7 expression?

Lambda expressions are anonymous functions that contain expressions or sequence of operators.

All lambda expressions use the lambda operator @L, that can be read as “goes to” or “becomes”.

The left side of the lambda operator specifies the input parameters and the right side holds

an expression or a code block that works with the entry parameters.

Here we can see about Lambda Pass by value, Lambda function condition check all the numbers which is Odd or not, Perform ADD operations by passing 10,10 value in add method, Action , Delegate, Predicate, anonymous function to print the given value.

lamdaj7.web

<WEB>

<PACK> Program8

{

<CLASS> Prog

{

static int Sum(int x, int y)

{

return x + y;

}

static bool IsUpperCase(string str)

{

return str.Equals(str.ToUpper());

}

public @D void Print(int value);

public void main()

{

// statement lambda that takes two int inputs and returns the sum

@A<string> greet = name @L

{

string greeting = "Hello";

<PRINTLN>(greeting+name);

};

greet("World");

int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

Func <int,bool> oddNumbers = n @L n % 2 == 1;

<PRINTLN>("There are "+oddNumbers(5)+" odd numbers in "+ string.Join(" ", numbers));

//streams

Func<int,int, int> add = Sum;

int result = add(10, 10);

<PRINTLN>(result);

@A<int> printActionDel = @D(int i)

{

<PRINTLN>(i);

};

printActionDel(10);

//predicate

@P <string> isUpper = IsUpperCase;

bool result1 = isUpper("hello world!!");

<PRINTLN>(result1);

//anonymous

Print print = @D(int val) {

<PRINTLN>("Inside Anonymous method. Value: {0}", val);

};

print(100);

}

Output

HelloWorld

There are True odd numbers in 5 4 1 3 9 8 6 7 2 0

20

10

False

Inside Anonymous method. Value: 100

Explanation

i) Lambda Pass by value and concat the strings greeting and

name.

@A<string> greet = name @L

{

string greeting = "Hello";

<PRINTLN>(greeting+name);

};

greet("World");

Here "@L" says that it is a lambda function.

when greet function is called and string "World" is

passed to the Lambda function. In the Lambda function

when greeting ="Hello" and greeting and name value is

passed to the print statement.Here name variable is

assigned as "World". So we will get output as "HelloWorld".

ii) Lambda function condition check all the numbers which is Odd or not?

int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

Func <int,bool> oddNumbers = n @L n % 2 == 1;

<PRINTLN>("There are "+oddNumbers(5)+" odd numbers in "+ string.Join(" ", numbers));

Here "@L" says that it is a lamda function.And we are assigning the

return type in Func function as int,boolean(bool).

ie) Func <int,bool> . Where n @L n % 2 == 1 is the lamda function condition.

It will check whether integers in numbers array is odd number or not.

so When the OddNumbers(5) is invoked and the print statement

will print boolean value as true. So this string.Join(" ",numbers) will

print numbers array complete contents. So we will get output as given below

There are True odd numbers in 5 4 1 3 9 8 6 7 2 0

iii) Perform ADD operations by passing 10,10 value in add method.

Func<int,int, int> add = Sum;

int result = add(10, 10);

<PRINTLN>(result);

static int Sum(int x, int y)

{

return x + y;

}

Here we are using 3 integers datatype in Func<int,int,int> and

we are assuming Sum method to add function; so it will perform

Sum operations using method Sum(int x, int y). When we pass the value

in add function which is given below..

add(10, 10) and we use <PRINTLN> statement to print the result value.

So we will get output as 20.

iv) Use Action Delegate to print the value which you passed

in printActionDel(10) method.

@A<int> printActionDel = @D(int i)

{

<PRINTLN>(i);

};

printActionDel(10);

What is Action Delegate ?

Action type delegate is the same as Func delegate except that

the Action delegate doesn't return a value. In other words, an

Action delegate can be used with a method that has a void return type.

Action Delegate is represented as @A in oakjava7 program.

Using object of Action delegate printActionDel(10) will print the value

as 10 as the output. Because we use <PRINTLN>(i) statement inside

Action Delegate block.

v) Check whether the given string is UpperCase or not. and print that boolean value

@P<string> isUpper = IsUpperCase;

bool result1 = isUpper("hello world!!");

<PRINTLN>(result1);

Predicate is the delegate like Func and Action delegates.

It represents a method containing a set of criteria and checks whether the

passed parameter meets those criteria. A predicate delegate methods must take one

input parameter and return a boolean - true or false.

Predicate Syntax

public @D bool @P<in T>(T obj);

Here at Predicate object isUpper is assigned a IsUpperCase functions.

so when we pass the value "hello world!!" to the Predicate object

isUpper will return the boolean value as false.Because it will check

whether the value "hello world!!" is UpperCase or not. But here it

is Lowercase so it return a value false as the output when we

print the result value.

vi) use anonymous function to print the given value.

//anonymous

Print print = @D(int val) {

<PRINTLN>("Inside Anonymous method. Value: {0}", val);

};

print(100);

Here in this Anonymous function object print(100)

means value 100 is passed to print Anonymous method.

val is assigned 100 as a value.

So <PRINTLN> will print the output which is given

below ...

Inside Anonymous method. Value: 100

=========================================================================

Sample 35: Define and Explain forward , include , visitor count,ip address and hostname internationalization with an example

=========================================================================================

1) Forward Action

==================

Syntax

======

public static forward list=new forward("{key}",arraylistobject);

It is used to forward a request or a list or set of data to another page.

Here {key} indicates the key , arraylistObject indicates arraylist object.

2) Include Action

==================

Syntax-1

=========

Java7request.include("<htmlfilename>",choice,"html");

It is used to insert a file into the same page.

Here <filename> given is html file name.

eg) Java7request.include("test.html",0,"html");

And "html" indicates it is html type file.

So choice =0 indicates that the filename belong to html file or

any other type filename.

Syntax-2

=========

Java7request.include("<otherfilename>",choice,"exe");

Here when we don't give htmlfilename and give as other filename and choice =1

and "exe" indicates that it is a executable file name. Then it will include

executable filename and it is called as assembly file.

eg) Java7request.include("autocomplete",1,"exe");

Syntax-3

========

Java7request.include("<otherfilename>",choice,"ojava7");

Here when we don't give htmlfilename and give as other filename and choice =2

and "ojava7" indicates that it is a oakjava7 file name and it is also an executable filename.

Then it will include oakjava7 executable filename and it is called as Oakjava7 assembly file.

eg) Java7request.include("jarray",2,"ojava7");

3) Visitor Count

================

Syntax:

=======

Java7request.Visitorscount("visitorname");

Visitor count will be incremented every time a person visit the page

and it's return value is always an integer.

eg) int count =Java7request.Visitorscount("visitor1");

Here visitor1 is the Visitorscount name.

4) Visitor clear count

=======================

Syntax

=======

Java7request.Clearcount("visitorname");

Visitor count will be cleared when the person visit the page 5 times

ie) if count > 5 then count =0;

and it's return value is always an void.

eg)

if (count >5)

Java7request.Clearcount("visitor1");

5) Date in Oakjava7

===================

Date d=new Date();

=> It is used to create date object d.

<PRINTLN>("Second of the minute is : "+d.getSeconds());

=> It is used to get seconds from our current date hour.

6) OakJava7 - internationalization i18n

=======================================

Locale[] locales = { new Locale("en", "US"),

new Locale("es", "ES"), new Locale("it", "IT") };

=> Locale[] contains array of US english, es Spanish, it Itally locale objects.

for (int i=0; i<3; i++)

{

String displayLanguage = locales[i].getDisplayLanguage(locales[i]);

<PRINTLN>(" "+locales[i].ToString() + " = " + displayLanguage);

<PRINTLN>("<BR>");

}

=> Here locales[i].getDisplayLanguage(locales[i]);

is to display languages as English, español, italiano

=> Here locales[i].ToString() will display as en_US, es_ES, it_IT repectively

for display languages as English, español, italiano

7) IP Address and Hostname

===========================

Syntax

======

Java7request.FindIPandHostname();

It is used to display IP address and Hostname for your machine

8) AutoRefresh Page

===================

Syntax

======

Java7request.AutoRefresh(n);

It will automatically refresh the page every n seconds

eg) Java7request.AutoRefresh(3000);

In this given example it will refresh the page

every 3 seconds.

Sample35.web

<WEB>

<USE> ScrollLib;//load ScrollLib packages

<USE> <OJ7UTIL> //load oakjava7 util packages

<PACK> example1

{

public <CLASS> Java7eg1

{

public static forward list= null;

public static void Java7eg1t2()

{

ArrayList ar = new ArrayList();

ArrayList ar1 = new ArrayList();

for(int i=0;i<100;i++)

ar.add(i);

for(int i=100;i<200;i++)

ar1.add(i);

list=new forward("language0",ar);

list.setValue("language1",ar1);

}

public void main()

{

<TRY>

{

Java7request.include("test.html",0,"html");

// Java7request.include("autocomplete",1,"exe");

// Java7request.include("jarray",2,"ojava7");

// Java7request.AutoRefresh(3000);

int count=Java7request.Visitorscount("visitor1");

Java7request.FindIPandHostname();

<PRINTLN>("visitor count="+count);

<PRINTLN>("<BR>");

if (count >5)

Java7request.Clearcount("visitor1");

Date d=new Date();

<PRINTLN>("Second of the minute is : "+d.getSeconds());

<PRINTLN>("<BR>");

Locale[] locales = { new Locale("en", "US"),

new Locale("es", "ES"), new Locale("it", "IT") };

for (int i=0; i<3; i++)

{

String displayLanguage = locales[i].getDisplayLanguage(locales[i]);

<PRINTLN>(" "+locales[i].ToString() + " = " + displayLanguage);

<PRINTLN>("<BR>");

}

<PRINTLN>("<BR>");

HTML.displayhtml("Register100.html");

}

<CATCH> (Exception e)

{

<PRINTLN>("Error.... "+e);

}

{

<PRINTLN>("The Finally block is executed...");

}

Note: It will display test.html form and the given below output and

after that it will display Register100.html form.

Output

Your current IP address : DESKTOP-H7QSQP2/192.162.67.5

Your current Hostname : DESKTOP-H7QSQP2

visitor count=6

<BR>

Second of the minute is : 47

<BR>

en_US = English

<BR>

es_ES = español

<BR>

it_IT = italiano

<BR>

=========================================================================================

Sample 36: Define and Explain first Page for forward action and Next page for forward action output.

=======================================================================================

Sample35.web contains static method Java7eg1t2().

Sample35.web

public static void Java7eg1t2()

{

ArrayList ar = new ArrayList();

ArrayList ar1 = new ArrayList();

for(int i=0;i<100;i++)

ar.add(i);

for(int i=100;i<200;i++)

ar1.add(i);

list=new forward("language0",ar);

//This statement will set arraylist value to ar1

list.setValue("language1",ar1);

}

Explanation

Arraylist ar contains 100 elements from 0 to 99

and Arraylist ar1 contains 100 elements from 100 to 199.

and Forward Action assumes two Arraylist objects ar and ar1.

Now see the second page program...

Sample36.web

<WEB>

<USE> ScrollLib;// load the ScrollLib util package

<USE> <OJ7UTIL>//load oakjava7 util packages

<USE> example1; // load the firstpage package example1

<PACK> example2

{

<CLASS> Java7eg2

{

public void main()

{

<TRY>

{

//Call the public static method Java7eg1t()

Java7eg1.Java7eg1t();

//ar1

ArrayList ars = Java7eg1.list.getForwardValue("language1");

<PRINTLN>(ars.get(90));

//ar

ArrayList ars1 = Java7eg1.list.getForwardValue("language0");

<PRINTLN>(" ");

<PRINTLN>(ars1.get(80));

}

<CATCH> (Exception e)

{

<PRINTLN>("Error.... "+e);

}

{

<PRINTLN>("The Finally block is executed...");

}

Explanation

After calling the public static method Java7eg1t() method which is

Java7eg1.Java7eg1t(),Java7eg1 represent the name of class and Java7eg1t() is the method name for Java7eg1.

which is called in Sample36.web and it will intialize the array list ars and ars2 values

of forward action values which are language1,language0 respectively which can be done which are given below....

ArrayList ars = Java7eg1.list.getForwardValue("language1");

// Note this Java7eg1.list.getForwardValue("language1") will return the Arraylist object Forward action "language1" value and which is assign to arraylist ars

<PRINTLN>(ars.get(90));

ArrayList ars1 = Java7eg1.list.getForwardValue("language0");

// Note this Java7eg1.list.getForwardValue("language0") will return the Arraylist object Forward action "language0" value

and which is assign to arraylist ars1

<PRINTLN>(" ");

<PRINTLN>(ars1.get(80));

So ars.get(90) arraylist contains 190 as value because we assigned the values of For loop from

100 to 199 and we add this to ar1 arraylist in sample35 program which is given below ...

for(int i=100;i<200;i++)

ar1.add(i);

and ars1.get(80) will contain 80 value because we assigned the values of For loop from

1 to 99.

We know finally block will execute whether error happens or not.

So it display the value with String "190 80The Finally block is executed..."

as output. So the output will be given below..

Output:

190 80The Finally block is executed...

==================================================================================

Sample 37: Define and Explain OakJava7 Context,OakJava7 Session, OakJava7 Config

==================================================================================

OakJava7 Context

OakJava7 Context will have constant Oakjava7 context values and it reduces the need of

xml file. So it will carry to be used with in the OakJava7 Web Application and

at the next OakJava7 Web application. Syntax is given below..

public static Java7Context <contextobject> = new Java7Context("Key=Value");

Java7 Context should be used outside any methods or main method. When you store

the values using this given above syntax. and when you use this given below syntax.

<Classname first program>.<contextobject>.get(Index).ToString();

we can retreive the value and we can print it by using the syntax which is given above...

example)

public static Java7Context list = new Java7Context("Secretno=1089678");

Program.list.get(0).ToString();

[where Program indicates Sessiontracking classname and list is the context object,

and we can get the first value by using get(0).ToString().]

OakJava7 Session

OakJava7 Session is created using the given below syntax...

public static Java7Session <sessionobject> = new Java7Session("<key>","<value>");

This is used to create OakJava7 Session, with key and value.

OakJava7 Session is used to carry data or array list of data to the page(filename.exe) that you have mentioned in html file.

OakJava7 Session can retrieve the value by using the given below Syntax.

<classname>.<sessionobject>.getSessionValue("<key>");

example)

public static Java7Session list1 = new Java7Session("No of employees","1000 employees");

public static void p()

{

list1.setValue("seqno1","2000 values");

list1.setValue("seqno2","2001 values");

list1.setValue("seqno3","2005 values");

}

so using <sessionobject>.setValue(....) function we can store many keys and value needed for the next page.

OakJava7 Config

OakJava7 Config is used to retrieve the configuration information. Example

using Java7Config.getParameter("Driver").

Syntax

Java7Config.getParameter("<configuration key name>");

J7Config.config file is a global Oakjava7Config file which is used to store all the configuration

information and such configuration will be used by the Oakjava7 programs.

eg) This <- arrow indicates that sun.jdbc.Driver is assigned to a key Driver.

This given below example indicates how to store the information with key and value parameters.

J7Config.config

Driver <- sun.jdbc.Driver

First Program

Sample37.web

<WEB>

<USE> ScrollLib;

<PACK> example11

{

public <CLASS> Program

{

public static Java7Session list1 = new Java7Session("No of employees","1000 employees");

public static Java7Context list = new Java7Context("Secretno=1089678");

public static void p()

{

list1.setValue("seqno1","2000 values");

list1.setValue("seqno2","2001 values");

list1.setValue("seqno3","2005 values");

}

Note: This program will generate a .dll file when you compile using javac7 <filename.web>.Put that filename.web.dll in oakjava7 properties file and after that copy that generated .dll file from outputs directory to d:\ or c:\oakjava7\src directory.

Second Program

Sample371.web

<WEB>

<USE> ScrollLib;

<USE> example11;

<PACK> Sessiontracks1

{

<CLASS> Program1

{

public void main()

{

<TRY>

{

<PRINTLN>(" <BR> ");

//intialize and add the session data or session Arraylist data.

Program.p();

<PRINTLN>(" <BR> ");

<PRINTLN>("Session value of seqno1 ="+Program.list1.getSessionValue("seqno1"));

<PRINTLN>(" <BR> ");

<PRINTLN>("OakJava7Context ="+Program.list.get(0).ToString());

<PRINTLN>(" <BR> ");

<PRINTLN>("Java7config="+Java7Config.getParameter("Driver"));

<PRINTLN>(" <BR> ");

}

<CATCH> (Exception e)

{

<PRINTLN>("Error.... "+e);

}

{

<PRINTLN>("The Finally block is executed...");

}

Final Output:-

Session value of seqno1 =2000 values

OakJava7Context =Secretno=1089678

Java7config=sun.jdbc.Driver

The Finally block is executed...

==================================================================================================================================================================================================

OAKJava7(JAVA7.0) Advanced Concepts : OakJava7 Streams

=======================================================================================

==================================================================================

Sample 38: OakJava7 Streams Introduction

==================================================================================

OakJava7 Streams

OakJava7 stream is invented by J. Wilmix jemin at year 2023. This project

takes the time for me around 1 month to build the OakJava7 Streams.

Streams are more important for the development to do

any program. OakJava7 stream is learnable.

In Java (Jdk1.8) streams are not learnable.So

Oakjava7 stream is nothing but it is same as

Jdk1.8 stream.So if you know Jdk1.8 then

you can easily learn OakJava7 Stream.

OakJava7 Streams represent a pipeline through which data will flow and the functions to

operate on the data. A pipeline in this instance consists of a stream source, followed by

zero or more intermediate operations, and a terminal operation.

OakJava7 Streams are used to optimize the oakjava7 source code.

But there are 8 blocks of streams which are given below....

Stream() block ,Read Ln block ,Display block,Streamagg() block,Streamfx() block,

Stream.Generate block,LOGIC block, and ParallelStream() block.

When these types of Block are used ? Explain it briefly ?

Mostly it is not to memorize all the blocks ,but you

have to say only the types of block during the oakjava7 interview.

Even if you don't use Read Ln block ,Display block,

Stream.Generate block,LOGIC block the oakjava7 compiler

will not throw error.

Stream() block

Stream block are the streams which contains

stream objects that can call any functions.

that is represented as

Stream()->

................

})->

where ...... represents Read Ln block ,Display block,

Stream.Generate block,and ,LOGIC block.

Stream()-> block is represented with Read Ln block ,Display block,

Stream.Generate block,and ,LOGIC block, Streams() are like pipeline.

Other Streams Block

Like Stream() block other Stream block like

Streamagg() block,Streamfx() block, and ParallelStream() block

functions the same things but the syntax may differ.

Streamfx() Block

Streamfx()->

......

Functions....

})->

where ...... represents Read Ln block ,Display block,

Stream.Generate block,and ,LOGIC block.

Where Functions represents Oakjava7 functions...

So only Oakjava7 functions should be mentioned in this

block.

Streamagg() block

========================

Streamagg()->

......

Agg f(x) in oj7stream

....

})->

where ...... represents Read Ln block ,Display block,

Stream.Generate block,and ,LOGIC block.

Where Functions represents Oakjava7 Aggregate functions...

So only Oakjava7 aggregate functions should be mentioned in this

block.

ParallelStream() block

In ParallelStream() Block stream

will display the data in a non sequence random order.

But Streams() block data will display the

datas in a sequence order. This is the

major difference between Stream() block

and Parallel stream block.. Parallel stream block

syntax is given below...

ParallelStream()

Read Ln block , LOGIC block, and Display block

The Read Ln block syntax is given below...

READLN(I->{

.........

Input statements...

})->

where ...... represents Read Ln block statements should be mentioned .So only

Input data should be mentioned according to the

rules of OakJava7 Stream. So it is good for

the client to read your program and analyze the Input

functionality which is mentioned in the

ReadLn block.

The Display block syntax is given below...

DISPLAY(O->{

.........

Output statements...

})->

where ...... represents Display block,

and ,LOGIC block.So only

Display statements(eg is Print statements and it's related statements) should be mentioned according to the rules of OakJava7 Stream. So it is good for

the client to read your program and analyze the output

functionality which is mentioned in the

DISPLAY block.

The Logic Block syntax is given below...

LOGIC(L->{

......... Logical statements...

})->

where ...... represents LOGICAL block statements should be represented in this Logic Block.Ie) only

Display statements(eg is Print statements and it's related statements) should be mentioned according to the rules of OakJava7 Stream. So it is good for the client to read your program and analyze the

functionality which is mentioned in the Logic block.

Stream.Generate block

When the business requirement became very complex or

hard or medium we must focus on Stream.Generate block.

It is same as Stream.Generate block followed by

limit() and skip functions or foreach functions.

So the Syntax for Stream.Generate block is given below...

Stream.Generate(()->{

......... Stream.Generate releated Logical statements.. or double for..loop or

double while -- loop or complex ,hard or medium statements..

})->

Where Stream.Generate releated Logical statements . or double for..loop or

double while -- loop or complex ,hard or medium statements..

example for Stream.Generate() is given below...

Medium problem : Ascending or descending order...

Stream.Generate(()->{

for (int i=0;i<n ;i++)

{

for (int j=0;j<n ;j++)

{

if (a[i] > a[j])

{

t=a[i];

a[i]=a[j];

a[j]=t;

}

})->

Note: We can see more detail about this 8 blocks like

Stream() block ,Read Ln block ,Display block,Streamagg() block,Streamfx() block,

Stream.Generate block,LOGIC block, and ParallelStream() block.

=============================================================================================

==============================================================================================

Sample 39: OakJava7 Streams :Sample -1 : Use of J7Filter and list array containing numbers.

==========================================================================================

Write a OakJava7 stream program using J7Filter (OakJava7 Filter) and Print the List array containing numbers present in the List.

oj7stream.web

<WEB> // Start point of oakjava7 program,it is mandatory.

// All the Oakjava7(JAVA7.0) namespace <PACK> should be used,

// so without namespace <PACK> will result in error and your oakjava7 program

// will not work correctly.

<PACK> sample1

{

public <CLASS> Programn

{

public void main()

{

// starting point of oakjava7 stream

Stream()->

// Input data stream -> READLN

READLN(I->{

int a=5;

int b=3;

int salary = 200000;

float f=123;

// letters arranged and oakjava7 array dimension should be focus on left side.

char []letters= { 'W', 'e', 'b'};

String a1="Madam";

String a2=a1+"1";

// pass the letter character array to string

string s1 <NEW> string(letters);

string s2 <NEW> string(letters);

})->

// Printing all the oakJava7 filter values using J7Print ie) Oakjava7Print statement.

DISPLAY(O->{

// J7Filter (Oakjava7 filter) returns boolean value only; and that J7filter value is passed to oakjava7 Print statement.

//check the condition if the salary is greater than 10000 value

// if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( salary > 10000));

//check the condition if the salary is greater than 10000 value ,if f value is greater than 121.0 or not or a1 value is "Madam" or not.

// If both conditions return true then the result will be the true value

// if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( (salary > 10000)&& (f>121.0)&&(a1=="Madam" ) ));

//check if a value is equal to 5 or not. if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( a ==5));

//check if a a value is greater than b or not. if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( a >b));

//check if a a value is less than b or not. if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( a < b));

//check if a a value is greater than b or not. and b value is equal to zero or not.

//If both conditions return true then the result will be the true value

// if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( (a >b) && (b==0)));

//check if a a value is greater than b or not. and b value is equal to zero or not.

//If any of the conditions return true then the result will be the true value

// if not return false other wise J7Filter return true.

obj->J7Print(obj->J7Filter( (a >b)|| (b==0)));

//if (a!=0) then J7Filter return true. otherwise return false...

obj->J7Print(obj->J7Filter(a!=0));

//if (a==a2) then J7Filter return true. otherwise return false...

obj->J7Print(obj->J7Filter(a1==a2));

//if (s1 equals s2) then J7Filter return true. otherwise return false...

// ie) Equals is used for string object comparison

obj->J7Print(obj->J7Filter(s1.Equals(s2) ));

// Assign numbers like (11,17,19,30,48,53,19) to the List

// <OJ7UTIL> is the oakjava7 util package.

<OJ7UTIL>.List lop= <OJ7UTIL>.Arrays.asList(11,17,19,30,48,53,19);

// Print the lop array List using J7Print by passing lop to J7Print function.

obj->J7Print(lop);

})->

<PRINTLN>("--------------------");

}

Explanation

I have already explained by giving comments above the Oakjava7 statements. J7Filter is for checking the condition. If the condition matches it will return a boolean value true or it will return false.

Note:

In the OakJava7 properties file you must use OJ7Stream.dll file. Go to

c:\ wilmix or create a directory in C or d drive or which directory you have created , start Visual studio

and type the command which is given below...

Use PS C:\wilmix> ./oj7stream

to run the program in visual studio code Editor.

Output

==============================================================================================

Note: This Oakjava7 Advanced Samples webpage is under construction for text alignment.

Here we covered 30% of Advanced samples , but remaining 70% of Advanced samples

will be found at Oakjava7 Enterprise Edition., and it is not found at Professional Edition.

But in Professional edition you can't learn about Oakjava7 templates. In Enterprise Edition

you can study more about OakJava7 Templates ,Security , Oakjava7 Advanced topics ,etc.