【Java每日一题】20161228

package Dec2016;

import java.util.ArrayList;
import java.util.List;

public class Ques1228 {

public static void main(String[] arg){
Student stu01 = new Student("001");
Student stu02 = new Student("001 ");  // stu02中001后面有个空格

List<Student> students = new ArrayList<Student>();
students.add(stu01);
students.add(stu02);
System.out.println("students是否包含001学号："+students.contains(stu01));
System.out.println("students是否包含002学号："+students.contains(stu02));
}
}

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;
return stuId.equalsIgnoreCase(stu.getStuId().trim());
}
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】20161228”查看20161227问题解析）

题目原发布于公众号、简书：【Java每日一题】20161228，【Java每日一题】20161228

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