GTU OOP Program - 21

21). 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.

import java.io.*;

public class Program_21 {
    public static void main(String[] args) {
        File file = new File("program_21.txt");
        if (file.exists()) {
            System.out.println("File already exists");
            System.exit(0);
        }

        try (PrintWriter output = new PrintWriter(file);) {
            // writing 150 integers created randomly to file
            for (int i = 0; i < 150; i++) {
                output.print(((int) (Math.random() * 400) + 1) + " ");
            }
            System.out.println("File program_21.txt created Succesfully!");
        } catch (FileNotFoundException fnfe) {
            System.out.println("Cannot create the file");
            fnfe.printStackTrace();
        }
    }
}

Output

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