public class PseudoTimeSlicing implements Runnable 
{ 
  private static final String 
  JAVA_VERSION = System.getProperty("java.version"), 
  JAVA_VENDOR = System.getProperty("java.vendor"), 
  OS_NAME = System.getProperty("os.name"), 
  OS_ARCH = System.getProperty("os.arch"), 
  OS_VERSION = System.getProperty("os.version"); 

  private static Thread me = null; 
  private static int timeSlice; 
  public PseudoTimeSlicing() { this(100); } 
  public PseudoTimeSlicing(int ts) { 

  // See http://www.javaworld.com/javaworld/jw-04-1999/ 
  // jw-04-toolbox_p.html for the correct way to do singletons 
  // in a multithreaded situation. 
  
  if (me == null) 
  { 
    System.out.println("Java version=" + JAVA_VERSION + "\nJava vendor=" + JAVA_VENDOR + "\nOS name=" + OS_NAME + "\nOS arch=" + OS_ARCH + "\nOS version=" + OS_VERSION); 
if (OS_NAME.equals("Solaris") || 
(OS_NAME.equals("Linux") && 
!JAVA_VENDOR.startsWith("IBM"))) { 
timeSlice = ts; 
me = new Thread(this); 
me.setPriority(Thread.MAX_PRIORITY); 
me.setDaemon(true); 
me.start(); 
System.out.println("PseudoTimeSlicing installed"); 
} else 
System.out.println("No PseudoTimeSlicing needed"); 
} else System.out.println( 
"PseudoTimeSlicing already installed"); 
} 
public void run() { 
if (Thread.currentThread() != me) return; 
// this highest-priority thread waking up sends the 
// currently executing thread back to the runnable set 
while (true) { 
try{Thread.sleep(timeSlice);}
catch (InterruptedException e) { /* ignored */ } 
} 
} 
}