20161228问题解析请点击今日问题下方的“【Java每日一题】20161229”查看（问题解析在公众号首发，公众号ID：weknow619）
package Dec2016;
import java.util.ArrayList;
import java.util.List;
public class Ques1229 {
public static void main(String[] args) {
Student stu01 = new Student("001");
Student stu02 = new Student(null);
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null："+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】20161229”查看20161228问题解析）
