利用java反射机制调用类的私有方法(推荐)

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * @author thomaslwq 
 * @version 创建时间：Sep 4, 2012 9:53:49 PM
 * 类说明
 */
public class ReflectionTest {
  
  public static void setObjectColor(Object obj) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAcces***ception, InvocationTargetException{
    Class cls = obj.getClass();
    //获得类的私有方法
    Method method = cls.getDeclaredMethod("privateMethod", null);
    method.setAccessible(true); //没有设置就会报错
    //调用该方法
    method.invoke(obj, null);
  }
  public static void main(String args[]) throws SecurityException, IllegalArgumentException, NoSuchMethodException, IllegalAcces***ception, InvocationTargetException{
    
    setObjectColor(new MyTest());
  }
}
 //测试类 
class MyTest{
  
  
  public void setMyTest(){
    System.out.println("setMyTest");
  }
  /**
   类的私有方法
   **/
  private void privateMethod(){
    System.out.println("调用了 private Method");
  }
  
}