Testing process IO Handling to preserve IO between parent/child when child dies.

Main.java

package net.dv8tion.test;

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

public class Main
{
    private static final String WAIT_ON_INSTANCE = "wait";
    private static final String NO_WAIT_ON_INSTANCE = "ignore";
    private static final String SECOND_INSTANCE_IDENTIFIER = "second";

    public static void main(String[] args) throws IOException, InterruptedException
    {
        if (args.length == 0)
        {
            printErrorMessage();
        }
        else if (args[0].equals(SECOND_INSTANCE_IDENTIFIER))
        {
            while (true)
            {
                System.out.println("I am here!");
                Thread.sleep(1000);
            }
        }
        else if (args[0].equals(WAIT_ON_INSTANCE) || args[0].equals(NO_WAIT_ON_INSTANCE))
        {
            relaunch(args[0].equals(WAIT_ON_INSTANCE));
        }
        else
        {
            printErrorMessage();
        }
    }

    public static File getThisJarFile() throws UnsupportedEncodingException
    {
      //Gets the path of the currently running Jar file
        String path = Main.class.getProtectionDomain().getCodeSource().getLocation().getPath();
        String decodedPath = URLDecoder.decode(path, "UTF-8");
        return new File(decodedPath);
    }

    private static void relaunch(boolean wait) throws IOException, InterruptedException
    {
        String[] command = new String[] {"java", "-jar", Main.getThisJarFile().getPath(), SECOND_INSTANCE_IDENTIFIER};
        ProcessBuilder processBuilder =  new ProcessBuilder(command);
        processBuilder.inheritIO(); //Tells the new process to use the same command line as this one.
        
        Process process = processBuilder.start();
        if (wait)
        {
            process.waitFor();
        }
        System.out.println("Original is ending here!");
    }

    private static void printErrorMessage() throws UnsupportedEncodingException
    {
        System.out.println("Relaunch using one of the argument versions:");
        System.out.printf("java -jar %s %s\nOR\njava -jar %s %s\n",
                Main.getThisJarFile().toPath(), WAIT_ON_INSTANCE,
                Main.getThisJarFile().toPath(), NO_WAIT_ON_INSTANCE);
    }
}