这篇文章给大家分享的是有关Java实现对象List排序的案例的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
按照对象中的某个属性，对对象List进行排序。
以初唐四杰的成绩排名为例，对诗人进行排序。
Java实现如下：
1、诗人（Poet）类结构，定义如下：
计算
安全
数据库
网络和加速
企业服务
/**
* Created by Miracle Luna on 2020/1/11
*/
public class Poet {
private String name;
private Double score;
public Poet(String name, Double score) {
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getScore() {
return score;
}
public void setScore(Double score) {
this.score = score;
}
@Override
public String toString() {
return "Poet{" +
"name='" + name + '\'' +
", score=" + score +
'}';
}
}2、诗人按照成绩排名，代码如下：
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
/**
* Created by Miracle Luna on 2020/1/11
*/
public class PoetSort {
public static void main(String[] args) {
List<Poet> poetList = new ArrayList<Poet>();
Poet poet1 = new Poet("杨炯", 94.0);
poetList.add(poet1);
Poet poet2 = new Poet("卢照邻", 92.5);
poetList.add(poet2);
Poet poet3 = new Poet("骆宾王", 95.0);
poetList.add(poet3);
Poet poet4 = new Poet("王勃", 99.5);
poetList.add(poet4);
// 初始顺序
System.out.println("==> 初始顺序如下：");
poetList.forEach(poet -> System.out.println(poet.toString()));
// 按照分数排名(从高到低)
poetList.sort(new Comparator<Poet>() {
@Override
public int compare(Poet poet1, Poet poet2) {
Double score1 = poet1.getScore();
Double score2 = poet2.getScore();
return score2.compareTo(score1);
}
});
System.out.println("\n==> 按照分数排名(从高到低)如下：");
poetList.forEach(poet -> System.out.println(poet.toString()));
// 按照分数排名(从低到高)
poetList.sort(new Comparator<Poet>() {
@Override
public int compare(Poet poet1, Poet poet2) {
Double score1 = poet1.getScore();
Double score2 = poet2.getScore();
return score1.compareTo(score2);
}
});
System.out.println("\n==> 按照分数排名(从低到高)如下：");
poetList.forEach(poet -> System.out.println(poet.toString()));
}
}3、运行结果如下：
==> 初始顺序如下：
Poet{name='杨炯', score=94.0}
Poet{name='卢照邻', score=92.5}
Poet{name='骆宾王', score=95.0}
Poet{name='王勃', score=99.5}
==> 按照分数排名(从高到低)如下：
Poet{name='王勃', score=99.5}
Poet{name='骆宾王', score=95.0}
Poet{name='杨炯', score=94.0}
Poet{name='卢照邻', score=92.5}
==> 按照分数排名(从低到高)如下：
Poet{name='卢照邻', score=92.5}
Poet{name='杨炯', score=94.0}
Poet{name='骆宾王', score=95.0}
Poet{name='王勃', score=99.5}感谢各位的阅读！关于“Java实现对象List排序的案例”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
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