NoThreadSecurityManager.java

import java.lang.SecurityManager;

public class NoThreadSecurityManager extends SecurityManager {

  public void checkAccess(Thread t)
  {
    super.checkAccess(t);
    throw new SecurityException("New thread not allowed");  
  }

  public void checkAccess(ThreadGroup g) {
    super.checkAccess(g);
    throw new SecurityException("New thread not allowed");  
  }

}