Code-Blocks II

Java Programs PART II :

Next level to basic programs are available here with sample inputs and outputs

1) NUMBER PALINDROME :

Java Program to Reverse a Number & Check if it is a Palindrome.

import java.util.*;

public class Palindrome

    public static void main(String args[])

        int n, m, a = 0,x;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter any number:");

        n = s.nextInt();

        m = n;

        while(n > 0)

            x = n % 10;

            a = a * 10 + x;

            n = n / 10;

        if(a == m)

            System.out.println("Given number "+m+" is Palindrome");

        else

            System.out.println("Given number "+m+" is Not Palindrome");

Sample input/output 1:

Enter any number:121

Given number 121 is Palindrome

Sample input/output 2:

Enter any number:145

Given number 145 is Not Palindrome

2) Java Program to Find Two Elements such that their Sum is Closest to Zero

import java.util.*;

public class Sum_Zero

    public static void main(String[] args)

        int n, min1 = 0, min2 = 1, sum, minimum;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter the number of elements you want:");

        n = s.nextInt();

        int a[] = new int[n];

        System.out.println("Enter all the numbers:");

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

            a[i] = s.nextInt();

        minimum=Math.abs(a[0] + a[1]);

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

            for(int j = i + 1; j < n; j++)

                sum = Math.abs(a[i] + a[j]);

                if(sum < minimum)

                    min1 = i;

                    min2 = j;

                    minimum = sum;

        System.out.println("Element 1:"+a[min1]);

        System.out.println("Element 2:"+a[min2]);

Sample input:

Enter the number of elements you want:5

Enter all the numbers:

-2

-1

Sample output:

Element 1:-2

Element 2:3

3) Java Program to Find if a Given Year is a Leap Year.

import java.util.*;

public class Check_Leap_Year

    public static void main(String args[])

        Scanner s = new Scanner(System.in);

        System.out.print("Enter any year:");

        int year = s.nextInt();

        boolean flag = false;

        if(year % 400 == 0)

            flag = true;

        else if (year % 100 == 0)

            flag = false;

        else if(year % 4 == 0)

            flag = true;

        else

            flag = false;

        if(flag)

            System.out.println("Year "+year+" is a Leap Year");

        else

            System.out.println("Year "+year+" is not a Leap Year");

Sample Input/output 1:

Enter any year:1800

Year 1800 is not a Leap Year

Sample Input/output 2:

Enter any year:2000

Year 2000 is a Leap Year

4) Java Program to Find Arithmetic Sum of 2 or 3 or 4 Variables by Passing Argument using Method Overloading.

import java.util.*;

public class Sum_Overloading

    int add(int x, int y)

        int sum;

        sum = x + y;

        return sum;

    int add(int x, int y, int z)

        int sum;

        sum = x + y + z;

        return sum;

    int add(int x, int y, int z, int w)

        int sum;

        sum = x + y + z + w;

        return sum;

    public static void main(String[] args)

        Sum_Overloading obj = new Sum_Overloading();

        int a = obj.add(10, 15);

        System.out.println("Sum with two arguments:"+a);

        int b = obj.add(10, 15, 20);

        System.out.println("Sum with three arguments:"+b);

        int c = obj.add(10, 15, 20, 25);

        System.out.println("Sum with four arguments:"+c);

Sample output:

Sum with two arguments:25

Sum with three arguments:45

Sum with four arguments:70

5) Java Program to Show the Nesting of Methods to find the area,perimeter,volume.

import java.util.*;

public class Nesting_Methods

    int perimeter(int l, int b)

            int pr = 12 * (l + b);

            return pr;

    int area(int l, int b)

            int pr = perimeter(l, b);

            System.out.println("Perimeter:"+pr);

            int ar = 6 * l * b;

            return ar;

    int volume(int l, int b, int h)

        int ar = area(l, b);

        System.out.println("Area:"+ar);

        int vol ;

        vol = l * b * h;

        return vol;

    public static void main(String[] args)

        Scanner s = new Scanner(System.in);

        System.out.print("Enter length of cuboid:");

        int l = s.nextInt();

        System.out.print("Enter breadth of cuboid:");

        int b = s.nextInt();

        System.out.print("Enter height of cuboid:");

        int h = s.nextInt();

        Nesting_Methods obj = new Nesting_Methods();

        int vol = obj.volume(l, b, h);

        System.out.println("Volume:"+vol);

Sample input:

Enter length of cuboid:5

Enter breadth of cuboid:6

Enter height of cuboid:7

Sample output:

Perimeter:132

Area:180

Volume:210

6) java sample program to find the use of final keyword and funtions.

import java.util.*;

class Figure

    final int length = 5;

    final int bredth = 4;

    final void area()

        int a = length * bredth;

        System.out.println("Area:"+a);

class Rectangle extends Figure

    final void rect()

        System.out.println("This is rectangle");

final public class Final_Use extends Rectangle

    public static void main(String[] args)

        Final_Use obj = new Final_Use();

        obj.rect();

        obj.area();

Sample Input:

This is rectangle

Sample Output:

Area:20

7) java program to perform string concatenation using funtions.

import java.util.*;

public class String_Concatenate

    public static void main(String[] args)

        String a, b, c;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter first string:");

        a = s.nextLine();

        System.out.print("Enter second string:");

        b = s.nextLine();

        String_Concatenate obj = new  String_Concatenate();

        c = obj.concat(a, b);

        System.out.println("New String:"+c);

    String concat(String x, String y)

        String z;

        z = x + " " + y;

        return z;

sample Input:

Enter first string:hello

Enter second string:world

Sample Output:

New String:hello world

8) java program to find the simple interest .

import java.util.*;

public class Simple_Interest

    public static void main(String args[])

        float p, r, t;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter the Principal : ");

        p = s.nextFloat();

        System.out.print("Enter the Rate of interest : ");

        r = s.nextFloat();

        System.out.print("Enter the Time period : ");

        t = s.nextFloat();

        float si;

        si = (r * t * p) / 100;

        System.out.print("The Simple Interest is : " + si);

Sample input:

Enter the Principal : 20202

Enter the Rate of interest : 2.5

Enter the Time period : 3

Sample output:

The Simple Interest is : 1515.15

9) java program to find the amstrong number from 1 to n.

import java.util.*;

public class Armstrong

    public static void main(String[] args)

        int n, count = 0, a, b, c, sum = 0;

        System.out.print("Armstrong numbers from 1 to 1000:");

        for(int i = 1; i <= 1000; i++)

            n = i;

            while(n > 0)

                b = n % 10;

                sum = sum + (b * b * b);

                n = n / 10;

            if(sum == i)

                System.out.print(i+" ");

            sum = 0;

sample output:

Armstrong numbers from 1 to 1000: 1 153 370 371 407

10) java program to check whether the given number is perfect number or not.

import java.util.*;

public class Perfect

    public static void main(String[] args)

        int n, sum = 0;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter any integer you want to check:");

        n = s.nextInt();

        for(int i = 1; i < n; i++)

            if(n % i == 0)

                sum = sum + i;

        if(sum == n)

            System.out.println("Given number is Perfect");

        else

            System.out.println("Given number is not Perfect");

    int divisor(int x)

       return x;

sample input:

Enter any integer you want to check:6

Sample output:

Given number is Perfect

11) java program to check whether the given number is a amstrong number or not.

import java.util.*;

public class ArmStrong

    public static void main(String[] args)

        int n, count = 0, a, b, c, sum = 0;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter any integer you want to check:");

        n = s.nextInt();

        a = n;

        c = n;

        while(a > 0)

            a = a / 10;

            count++;

        while(n > 0)

            b = n % 10;

            sum = (int) (sum+Math.pow(b, count));

            n = n / 10;

        if(sum == c)

            System.out.println("Given number is Armstrong");

        else

            System.out.println("Given number is not Armstrong");

Sample input:

Enter any integer you want to check:153

sample output:

Given number is Armstrong

12) java program to find the given number is prime or not.

import java.util.*;

public class CheckPrime

    public static void main(String args[])

        int j, x, flag = 0;

        System.out.print("Enter any number :");

        Scanner s = new Scanner(System.in);

        x = s.nextInt();

        for( j = 2; j < x; j++)

            if(x % j == 0)

                flag = 0;

                break;

            else

                flag = 1;

         if(flag == 1)

             System.out.println("The "+x+" is a prime number.");

         else

             System.out.println("The "+x+" is not a prime number.");

sample input:

Enter any number :45

sample output:

The 45 is not a prime number.

13) java program to generate  fibonacci series

import java.util.*;

public class Fibonacci

    public static void main(String[] args)

        int n, a = 0, b = 0, c = 1;

        Scanner s = new Scanner(System.in);

        System.out.print("Enter value of n:");

        n = s.nextInt();

        System.out.print("Fibonacci Series:");

        for(int i = 1; i <= n; i++)

            a = b;

            b = c;

            c = a + b;

            System.out.print(a+" ");

sample input:

Enter value of n:5

sample output:

Fibonacci Series:0 1 1 2 3

14) java program to compute the sum of two complex numbers using buffer reader.

import java.*;

public class ComplexNumbers {

    // Main function to read two complex numbers and add them

    public static void main(String[] args) {

    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double i1,j1,i2,j2;

        System.out.println("Enter the real part and

                            imaginary part of the first complex number");

        try{

            i1=Double.parseDouble(br.readLine());

            j1=Double.parseDouble(br.readLine());

        }catch (Exception e){

            System.out.println("An error occurred");

            return;

        System.out.println("Enter the real part and

                            imaginary part of the second complex number");

        try{

            i2=Double.parseDouble(br.readLine());

            j2=Double.parseDouble(br.readLine());

        }catch (Exception e){

            System.out.println("An error occurred");

            return;

        System.out.println("The first complex number is "

                            + i1 + " + i(" + j1 + ")");

        System.out.println("The second complex number is "

                            + i2 + " + i(" + j2 + ")");

        System.out.println("The sum of the two complex numbers is "

                            + (i1 + i2) + " + i(" + (j1 + j2) + ")");

sample input:

Enter the real part and imaginary part of the first complex number

Enter the real part and imaginary part of the second complex number

-5

sample output:

The first complex number is 4.0 + i(6.0)

The second complex number is -5.0 + i(2.0)

The sum of the two complex numbers is -1.0 + i(8.0)

15) java program to print the area of a trapezium

import java.io.*;

public class AreaOfATrapezium {

    // Function to find area of a trapezium

    public static void main(String[] args) {

   BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        double l1,l2,height;

        System.out.println("Enter the length of the two parallel sides

                                     and the height of the trapezium");

            l1=Double.parseDouble(br.readLine());

            l2=Double.parseDouble(br.readLine());

            height=Double.parseDouble(br.readLine());

        if(l1<=0 || l2<=0 || height<=0){

            System.out.println("Wrong Input");

        System.out.println("Area = " + (l1+l2)*height/2 );

sample input:

Enter the length of the two parallel sides and the height of the trapezium

13.765

23.555

8.0

sample output:

Area = 149.28

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