인터페이스

package com.inter3;

interface IHello{
	void sayHello(String name);
}

class Hello implements IHello{
	public void sayHello(String name){
		System.out.println(name + "씨 안녕하세요!");
	}
}

public class InterfaceTest01 {
	public static void main(String[] args){
		Hello obj = new Hello();
		obj.sayHello(args[0]);
	}
}