OOP-JAVA Practical 21

• PPS(C)
• JAvA

• Aim: Write a program to create a file name 123.txt, if it does not exist. Append a new data to it if it already exist. Write 150 integers created randomly into the file using Text I/O. Integers are separated by space.
• Code:

  import java.io.File;
  import java.io.FileWriter;
  import java.util.Scanner;
  public class practical21{
      public static void main(String[] args) {
          try {
              File file = new File("123.txt");
              FileWriter mWriter=new FileWriter("123.txt");
              for(int i=0;i<150;i++){
                  mWriter.write(String.format("%4d", (int)(Math.random()*150)));
                  if ((i+1)%25==0) {
                      mWriter.write("\n");
                  }
              }
              mWriter.close();
              Scanner s=new Scanner(file);
              while (s.hasNextLine()) {
                  String data=s.nextLine();
                  System.out.print(data);
              }
              s.close();
          } catch (Exception e) {
              System.out.println("An error occurred");
          }
      }
  }

• Output:
  

Practical 20 Practical 22