Exemple de tri de liste de tableaux Java (utilisation de liste de tableaux)

Écrit un exemple de tri de tableaux Java, partagé ici pour que tout le monde puisse apprendre ensemble

package com.yonyou.test;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class Test {
 public static void main(String[] args) {
  Student zlj = new Student("丁晓宇", 21);
  Student dxy = new Student("赵四", 22);
  Student cjc = new Student("张三", 11);
  Student lgc = new Student("刘武", 19);
  List<Student> studentList = new ArrayList<Student>();
  studentList.add(zlj);
  studentList.add(dxy);
  studentList.add(cjc);
  studentList.add(lgc);
  System.out.println("按照年齡排序：");
  Collections.sort(studentList, new SortByAge());
  for (Student student : studentList) {
   System.out.println(student.getName() + " / " + student.getAge());
  }
  System.out.println(" ========= ");
  System.out.println("按照姓名排序");
  Collections.sort(studentList, new SortByName());
  for (Student student : studentList) {
   System.out.println(student.getName() + " / " + student.getAge());
  }
 }
}
class SortByAge implements Comparator {
 public int compare(Object o1, Object o2) {
  Student s1 = (Student) o1;
  Student s2 = (Student) o2;
  if (s1.getAge() > s2.getAge())
   return 1;
  else if (s1.getAge() == s2.getAge()) {
   return 0;
  }
  return -1;
 }
}
class SortByName implements Comparator {
 public int compare(Object o1, Object o2) {
  Student s1 = (Student) o1;
  Student s2 = (Student) o2;
  if(s1.getName().compareTo(s2.getName()) < 0)
   return -1;
  else if (s1.getName().compareTo(s2.getName()) > 0) {
   return 1;
  }
  return 0;
 }
}
class Student{
 private int age;
 private String name;
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public Student(String name,int age) {
  this.age = age;
  this.name = name;
 }
}

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