【Java每日一题】20170220

20170217问题解析请点击今日问题下方的“【Java每日一题】20170220”查看（问题解析在公众号首发，公众号ID：weknow619）

package Feb2017;  

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;  

public class Ques0220 {
    public static void main(String[] args) {
        List<Student> list = new ArrayList<Student>();
        list.add(new Student("001"));  

        Map<Student, Object> map = new HashMap<Student, Object>();
        map.put(new Student("001"), new Object());  

        System.out.println("list是否包含001："+list.contains(new Student("001")));
        System.out.println("map是否包含001："+map.containsKey(new Student("001")));
    }
}  

class Student{
    private String stuId;
    public Student(String stuId) {
        super();
        this.stuId = stuId;
    }      

    public String getStuId() {
        return stuId;
    }      

    public void setStuId(String stuId) {
        this.stuId = stuId;
    }      

    @Override
    public boolean equals(Object obj) {
        if(obj instanceof Student){
            Student stu = (Student) obj;
            if(stu.getStuId() == null || stuId == null){
                return false;
            }else{
                return stuId.equalsIgnoreCase(stu.getStuId());
            }
        }
        return false;
    }
} 

今日问题： 
请问主程序输出结果是什么？（点击以下“【Java每日一题】20170220”查看20170217问题解析）

题目原发布于公众号、简书：【Java每日一题】20170220，【Java每日一题】20170220 （也可以扫描头像二维码查看）