java中反射类的方法

<span style="white-space:pre">	</span>public void fun(){
		System.out.println("fun1");
	}
	
	public void fun(String name,int password){
		System.out.println(name+"::"+password);
	}
	
	public Class[] fun(String name,int[] password){
		return new Class[]{String.class};
	}
	
	private void fun(InputStream in){
		System.out.println(in);
	}
	
	public static void fun(int num){
		System.out.println(num);
	}

对应如下

<span style="white-space:pre">	</span>public void test1() throws Exception{
		Person p = new Person();
		Class clazz = Class.forName("reflect.Person");
		//fun为调用的函数
		Method method = clazz.getMethod("fun", null);
		//p为对象，后面为参数
		method.invoke(p, null);
	}

public void test2() throws Exception{
		Person p = new Person();
		Class clazz = Class.forName("reflect.Person");
		Method method = clazz.getMethod("fun",String.class,int.class);
		method.invoke(p,"xiaoming",22);
	}

public void test3() throws Exception{
		Person p = new Person();
		Class clazz = Class.forName("reflect.Person");
		Method method = clazz.getMethod("fun", String.class,int[].class);
		Class cs[] = (Class[]) method.invoke(p, "zhangsan",new int[]{1,2,3});
		System.out.println(cs[0]);
	}

public void test4() throws Exception{
		Person p = new Person();
		Class clazz = Class.forName("reflect.Person");
		Method method = clazz.getDeclaredMethod("fun",InputStream.class);//private型的
		method.setAccessible(true);
		method.invoke(p,new FileInputStream("d:\\test.txt"));//此文件要存在
	}

public void test5() throws Exception{
		Person p = new Person();
		Class clazz = Class.forName("reflect.Person");
		Method method = clazz.getMethod("fun", int.class);
		//静态方法不需要对象也行
		method.invoke(null,23);
	}