java泛型草稿

 

toString()

compareTo()

import java.util.Arrays;

class Person implements Comparable<Person> {
    String name;
    int score;
    Person(String name, int score) {
        this.name = name;
        this.score = score;
    }
    public String toString(){
        return this.name + "," + this.score;
    }
    @Override public int compareTo(Person other) {
        if(this.score > other.score) return 1;
        else if(this.score < other.score) return -1;
        else return 0;
    }

}
public class demo {
    public static void main(String[] args) {

//        String本身已经实现了Comparable<String>接口
//        String[] ss = new String[]{"Orange", "Apple", "AAPear"};
//        Arrays.sort(ss);
//        System.out.println(Arrays.toString(ss));

        Person[] ps = new Person[] {
                new Person("Bob", 61),
                new Person("Alice", 88),
                new Person("Lily", 75),
        };
        Arrays.sort(ps);
        System.out.println(Arrays.toString(ps));
    }
}