package Set_one;

import java.io.*;

import java.util.Scanner;

public class q1 {

public static void main(String[] args) throws Exception{

 // Using BufferedReader

 File x = new File("H:\\Java LAb\\Lab Task CSE 298\\Input.txt");

 BufferedReader y = new BufferedReader(new FileReader(x));

 String z;

 while((z = y.readLine()) != null)

 System.out.println(z);

 //Using FileReader

 FileReader as = new FileReader("H:\\Java LAb\\Lab Task CSE 298\\Input 2.txt");

 int i;

 while((i=as.read()) != -1)

  System.out.println((char)i);

 //Using Scanner

 File z1 = new File("H:\\Java LAb\\Lab Task CSE 298\\Input 3.txt");

 Scanner ab = new Scanner(z1);

 ab.useDelimiter("\\Z"); 

 System.out.println(ab.next());

}

}

package Set_one;

import java.io.*;

import java.io.FileWriter;

import java.io.IOException;

public class q2 {

public static void main(String[] args){

  try {

  FileWriter x = new FileWriter("H:\\Java LAb\\Lab Task CSE 298\\Output.txt");

  //Simple way

  x.write("Hi this is the Ytosko");

  x.close();

  System.out.println("Writting output done!");

  //Complex way

  FileWriter y = new FileWriter("H:\\Java LAb\\Lab Task CSE 298\\Output 1.txt");

  BufferedWriter ax = new BufferedWriter(y);

  ax.write("I am ");

  ax.write("Saiki Sarkar");

  ax.newLine();

  ax.write("i am from SUST");

  ax.close();

  System.out.println("Writting output 2 done!");

 } catch (IOException e) {

  System.out.println("Error!");

 }

}

}

17.3

package Set_one;

import java.io.*;

import java.util.Scanner;

public class q3_17_3 {

public static void main(String[] args){

  Scanner x = new Scanner(System.in);

 System.out.println("Enter the directory name : ");

 analysis(x.nextLine());

}

public static void analysis(String path) {

 File a = new File(path);

 if(a.exists()){

  System.out.printf("%s %s\n%s\n%s\n%s\n%s %s\n%s %s\n%s %s\n%s %s\n%s %s", a.getName(), "Exists",(a.isFile()?"is a file":"is not a file"),(a.isDirectory()?"is a Directory":"is not a directory"),(a.isAbsolute()?"Is an absulote path":"is not an absulote path"),"Last modified :",a.lastModified(),"Length :",a.length(),"Path :",a.getPath(),"Absulote path :",a.getAbsolutePath(),"Parent :",a.getParent());

  if(a.isDirectory()){

   String[] b = a.list();

   System.out.println("\nDirectory contains :\n");

   for(String g : b)

    System.out.println(g);

  }

 }

 else{

  System.out.printf("%s %s",path,"doesn't exists!");

 }

}

}

17.4

package Set_one;

public class q3_17_4 {

   Integer ac;

   String fn;

   String ln;

   double bal;

   public q3_17_4(){

     this(0,"","",0.0);

   }

public q3_17_4(int i, String string, String string2, double d) {

 setac(i);

 setfn(string);

 setln(string2);

 setbal(d);

}

private void setbal(double d) {

 bal = d;

}

private void setln(String string2) {

 ln = string2;

}

private void setfn(String string) {

 fn = string;

}

private void setac(int i) {

 ac = i;

}

public int getac(){

 return ac;

}

public String getfn(){

 return fn;

}

public String getln(){

 return ln;

}

public double getbal(){

 return bal;

}

public static void main (String[] args){

 q3_17_4 ob1 = new q3_17_4(2, "Saiki", "Sarkar", 3.15);

 System.out.printf("Account : %d ",ob1.getac());

 System.out.printf("Name : %s %s ",ob1.getfn(),ob1.getln());

 System.out.printf("Balance : %.2f",ob1.getbal());

}

}