package 使用Comparator接口;
import java.util.Comparator;
import java.util.Set;
import java.util.TreeSet;
class Person{
private String name;
private Integer age;
public Person(String name, Integer age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
class AcsAgeComparator implements Comparator<Person>{//按年龄升序,这是一个第三方比较器
@Override
public int compare(Person o1, Person o2) {
return o1.getAge()-o2.getAge();
}
}
public class Test {
public static void main(String[] args) {
Set<Person> set = new TreeSet<>(new AcsAgeComparator());
set.add(new Person("张三",20));
set.add(new Person("李四",18));
System.out.println(set);
}
}
Comparable接口与Camparator接口区别
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转载自blog.csdn.net/weixin_40995778/article/details/85537888
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