import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;/** * @author thomaslwq  * @version 創建時間：Sep 4, 2012 9:53:49 PM * 類說明 */public class ReflectionTest {    public static void setObjectColor(Object obj) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAcces***ception, InvocationTargetException{    Class cls = obj.getClass();    //獲得類的私有方法    Method method = cls.getDeclaredMethod("privateMethod", null);    method.setAccessible(true); //沒有設置就會報錯    //調用該方法    method.invoke(obj, null);  }  public static void main(String args[]) throws SecurityException, IllegalArgumentException, NoSuchMethodException, IllegalAcces***ception, InvocationTargetException{        setObjectColor(new MyTest());  }} //測試類 class MyTest{      public void setMyTest(){    System.out.println("setMyTest");  }  /**   類的私有方法   **/  private void privateMethod(){    System.out.println("調用了 private Method");  }  }