ArrayList按照元素的特性排序

来源：互联网发布：软件代理出口编辑：程序博客网时间：2024/05/16 19:10
ArrayList的排序

[代码] [Java]代码

view source
print?
01import java.util.ArrayList;
02import java.util.Collections;
03import java.util.Comparator;
04 
05public class ArrayListSort {
06 
07    public static void main(String[] args) {
08        ArrayList<Person> persons = new ArrayList<Person>();
09        Person zhangsan = new Person("zhangsan", 20, true);
10        Person lisi = new Person("lisi", 21, true);
11        Person wangwu = new Person("wangwu", 18, false);
12        persons.add(zhangsan);
13        persons.add(lisi);
14        persons.add(wangwu);
15 
16        Collections.sort(persons, new Comparator<Person>() {
17            @Override
18            public int compare(Person o1, Person o2) {
19                if (o1 != null && o2 != null) {
20                    if (o1.getAge() > o2.getAge()) {
21                        return 1;
22                    } else if (o1.getAge() < o2.getAge()) {
23                        return -1;
24                    }
25                }
26                return 0;
27            }
28        });
29 
30        for (Person p : persons) {
31            System.out.println(p);
32        }
33    }
34 
35}
36class Person {
37 
38    private String name;
39    private int age;
40    private boolean sex;
41 
42    public Person() {
43    }
44 
45    public Person(String name, int age, boolean sex) {
46        this.name = name;
47        this.age = age;
48        this.sex = sex;
49    }
50 
51    public String getName() {
52        return name;
53    }
54 
55    public void setName(String name) {
56        this.name = name;
57    }
58 
59    public int getAge() {
60        return age;
61    }
62 
63    public void setAge(int age) {
64        this.age = age;
65    }
66 
67    public boolean isSex() {
68        return sex;
69    }
70 
71    public void setSex(boolean sex) {
72        this.sex = sex;
73    }
74 
75    @Override
76    public String toString() {
77        return "name=" + name + "\tage=" + age + "\tsex" + sex;
78    }
79 
80}