[jboss-user] [Javassist user questions] - NewExpr Error!!!!

[Panzer_Kavalier]

public class Test implements Runnable{
	
	
	public Test(){
		Thread t = new Thread(this);
		t.start();
	}
	public void run(){
		System.out.println("run");
	}
	

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		Test test = new Test();

	}
	

}
-----------------------------------------------------------------------------
public class EmulatorThread implements Runnable{

	public Runnable _target;


	public EmulatorThread(Runnable target) {

		_target = target;
	}
	
	
	protected void start(){
		(new Thread(this)).start();
	}
	
    public void run()
    {
        if(_target != null)
        	_target.run();
    }
}

---------------------------------------
public class MethodSetEditor extends ExprEditor {

public void edit(NewExpr m) throws CannotCompileException{
		try{
			
			
			if (m.getConstructor().getDeclaringClass().getName()
					.equals("java.lang.Thread")) {
				if (m.getConstructor().getSignature().equals(
						"(Ljava/lang/Runnable;)V")) {
					m.replace("{$_ = new EmulatorThread($1);}");
				}
			}
			}
			catch(Exception e){
				e.printStackTrace();
			}
}

}

-----------------------------------------
when I use the folowing codes to modify the above code:
		ClassPool pool = ClassPool.getDefault();
		
		try{
		pool.appendClassPath("D:\\eclipse\\workspace\\Javassist\\");
		
		CtClass cc = pool.makeClass(new FileInputStream("D:\\eclipse\\workspace\\Javassist\\Test.class"));
		
	    CtField [] cts = cc.getFields();
	    for(int i = 0; i < cts.length; i++){
	    	if(cts.getSignature().equals("Ljava/lang/Thread;"))
	    		cts.setType(pool.makeClass("EmulatorThread"));
	    }
	    
	    cc.instrument(new MethodSetEditor());
	    
	    cc.writeFile("E:\\");
		}
		catch(Exception e){
			e.printStackTrace();
		}

when I run the Test. the following error occured:
Exception in thread "main" java.lang.VerifyError: (class: Test, method:  s
ignature: ()V) Incompatible object argument for function call

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