java语法：04_面向接口编程

package com.guoyasoft.implement;

import java.util.List;

import org.testng.internal.junit.ArrayAsserts;

public class TestStudent {
    public static void main(String[] args) {

        IStudy wl1=new StudentWL();
        IStudy wl2=new StudentCY();

        List<IStudy> list=new ArrayList<IStudy>();
        list.add(wl1);
        list.add(wl2);
        
        for(IStudy s:list){
            s.doHomeWork("家庭作业");
            s.learn("法语");
        }
        
    }
}