class Student {
public String name;
public int id;
public char gender;
public Student(String name, int id, char gender){
this.name = name;
this.id = id;
this.gender = gender;
}
}
然后我有一个ArrayList, 添加了三个学生进去
public static void main(String[] args){
List list = new ArrayList();
list.add(new Student("Tom", "3423", 'M'));
list.add(new Student("Tom", "1291", 'M'));
list.add(new Student("Marry", "3421"),'F'));
//然后我想给list里面的学生排序,很简单,只一行代码就可以
Collections.sort(list, new MyComparator());
}