a simple jvm launcher

ever wanted to have more memory available with jvm, but didn't want to write platform dependent shell script or .bat files? here is a sampler, it spawns a new vm with more memory from the class file, which can be packed as a jar (you need jdk 1.5 for this code):

import javax.swing.*;

public class Hello {
  public static void main(String [] args) {
    if (args.length == 0) {
      try {
        System.out.println("I now have : " + Runtime.getRuntime().maxMemory());
        Process p = new ProcessBuilder("java", "-Xmx256m", "Hello", "memory").start();        
      } catch(Exception e) {
        e.printStackTrace();
      }
    } else {      
      JFrame f = new JFrame("Hi! I have more memory!: " + Runtime.getRuntime().maxMemory());
      f.setVisible(true);
    } // end if
  }
}