How to Reset the Standard Output Stream in Java?

How can I reset the standard output stream in Java after using System.setOut?

PrintStream originalOut = System.out; // Store the original output
System.setOut(new PrintStream(new FileOutputStream("output.txt"))); // Redirect output
System.setOut(originalOut); // Reset to original output

In Java, you can redirect the standard output stream using the `System.setOut` method to direct the output to a different destination, such as a file. To reset the standard output stream to its original state, you first need to store a reference to the original output stream. This guide explains how to achieve this effectively.

// Example code to reset Standard Output
import java.io.*;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        // Store the original output stream
        PrintStream originalOut = System.out;

        // Redirect standard output to a file
        System.setOut(new PrintStream(new FileOutputStream("output.txt")));

        // Print to the new output stream
        System.out.println("This output goes to output.txt");

        // Reset to original output
        System.setOut(originalOut);

        // Print to the standard output again
        System.out.println("This output goes to console");
    }
}

Causes

• Using `System.setOut()` changes the default output stream.
• Failing to store the original output stream before redirection.

Solutions

• Store the original output stream in a variable before setting a new one.
• Use this stored reference to reset the output stream when needed.
• Example: Save the original output using a `PrintStream` variable.

Mistake: Neglecting to store the original standard output stream.

Solution: Always save the original output to a variable before changing it.

Mistake: Forgetting to reset the output after redirection.

Solution: Make sure to include a reset step after you're done redirecting.