import?java.lang.reflect.Method;

public?class?MethodDemo1?{
	class?A{
		public?void?print(int?a,int?b){
			System.out.println(a+b);
		}
		public?void?print(String?a,String?b){
			System.out.println(a.toUpperCase()+"?"+b.toLowerCase());
		}
	}
	public?static?void?main(String[]?args){
		A?a1?=?new?A();
		Class?c?=?a1.getClass();
		//獲取方法，名稱和參數(shù)列表決定
		//getMethod獲取的是public的方法
		//getDelcareMethod自己聲明的方法
			try?{
				//Method?m?=?c.getMethod("print",?new?Class[]{int.class,int.class});
				Method?m?=?c.getMethod("print",int.class,int.class);
				
				//方法的反射操作，是用m對(duì)象進(jìn)行方法調(diào)用
				m.invoke(a1,?new?Object[]{10,20});
				
				
			}?catch?(Exception?e)?{
				//?TODO?Auto-generated?catch?block
				e.printStackTrace();
			}?
	}
	

}	

A a1 = new A(); ?這里報(bào)錯(cuò)不知道為什么

No enclosing instance of type MethodDemo1 is accessible. Must qualify the allocation with an enclosing instance of type MethodDemo1 (e.g. x.new A() where x is an instance of MethodDemo1).

這是報(bào)錯(cuò)的信息

求解答 ? 實(shí)在不知道怎么回事