import java.lang.reflect.Method;

public class testReflect {

	/**

	 * @param args

	 */

	public static void main(String[] args) {

		try {

			Wu w=new Wu();

			Object[] argspara=new Object[]{};

			testReflect.invokeMethod(w, "outInfo",argspara);

			argspara=new Object[]{"wu"};

			testReflect.invokeMethod(w, "outInfo",argspara);

			argspara=new Object[]{"wu",2};

			testReflect.invokeMethod(w, "outInfo",argspara);

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * 反射调用方法

	 * @param newObj 实例化的一个对象

	 * @param methodName 对象的方法名

	 * @param args 参数数组

	 * @return 返回值

	 * @throws Exception

	 */

	public static Object invokeMethod(Object newObj, String methodName, Object[] args)throws Exception {

		Class ownerClass = newObj.getClass();

		Class[] argsClass = new Class[args.length];

		for (int i = 0, j = args.length; i < j; i++) {

		   argsClass[i] = args[i].getClass();

		}

		Method method = ownerClass.getMethod(methodName, argsClass);

		return method.invoke(newObj, args);

	}

}

class Wu{

    public void outInfo() {

        System.out.println("Wu.outInfo");

    }

    public void outInfo(String s) {

        System.out.println("Wu.outInfo(String s):"+s);

    }

    public void outInfo(String s,Integer n) {

        System.out.println("Wu.outInfo(String s,int n):"+s+n);

    }

}