List集合实现自定义排序

来源：互联网发布：win10开机windows聚焦编辑：程序博客网时间：2024/06/05 14:30

List自定义排序根据Collections.sort重载方法来实现，实现Comparable接口。

实现Comparator ,重写compare方法。

public class DataSort implements Comparator<Student>{/** * 重写方法 实现自定义排序 */@Overridepublic int compare(Student o1, Student o2) {int i = o1.getAge() - o2.getAge();//按照年龄排序(从小到大)           //年龄相等的情况下if(i == 0){              return 0;          }          return i;  }public static void main(String[] args) {List<Student> students = new ArrayList<Student>();          students.add(new Student(11));          students.add(new Student(21));          students.add(new Student(31));          students.add(new Student(22));          students.add(new Student(15));          students.add(new Student(27));          for(Student stu : students) {              System.out.println("age:" + stu.getAge());          }          Collections.sort(students,new DataSort());  //排序        for(Student stu : students) {              System.out.println("age:" + stu.getAge());          }  }}

student类：

public class Student {      private int age;         public Student(int age) {super();this.age = age;}public int getAge() {          return age;      }      public void setAge(int age) {          this.age = age;      }  }

0 0