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();
		}
	}
	
	/**
	 * 反射呼叫方法
	 * @param newObj 例項化的一個物件
	 * @param methodName 物件的方法名
	 * @param args 引數陣列
	 * @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); 
    } 
}