Redirect standard output - A Java Code Example

If you want to change the location to where the standard output messages go there's a method in the System class called setOut() which takes a PrintStream instance as argument.
In this code example we show how to redirect all standard output messages to a file by creating a FileOutputStream instance and pass it to the PrintStream instance that is sent to the setOut method, like so:

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
/**
* Main.java
*
* @author www.javadb.com
*/
public class Main {

    /**
     * Redirects System.out and sends all data to a file.
     *
     */
    public void redirectSystemOut() {

        try {

            System.setOut(new PrintStream(new FileOutputStream("system_out.txt")));

        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
            return;
        }

        System.out.println("This won't get displayed on the console, but sent to the file system_out.txt");

    }
    /**
     * Starts the program
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new Main().redirectSystemOut();
    }
}

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