system.out to file

DemoSystemOut.java

package lesson8.chars;


import java.io.*;

public class DemoSystemOut {

    public static void main(String[] args) {

        try (OutputStream outputStream = new FileOutputStream(new File("system.out.txt"));
             PrintStream printOut = new PrintStream(outputStream)) {

            System.setOut(printOut);
            System.out.println("Hello, world!");
            
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}