Java中comparator接口和Comparable接口的比较解析

 public static void main(String[] args) {
        List<Integer> list= new ArrayList<>();
        list.add(20);
        int i=0;
        while (i<10){
            list.add(i++);
        }
        list.sort(new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                if (o1.intValue()>o2.intValue()){
                    return 1;
                }else if (o1.intValue()<o2.intValue()){
                    return -1;
                }
                return 0;
            }
        });
        System.out.println(list.toString());
    }

Integer[] ins = {3, 5, 1, 6, 7};
        Arrays.sort(ins, new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                if (o1.intValue()>o2.intValue()){
                    return 1;
                }else if (o1.intValue()<o2.intValue()){
                    return -1;
                }
                return 0;
            }
        });
        System.out.println(Arrays.toString(ins));

public class   Person implements Comparable<Person> {
    public Integer getAge() {
        return age;
    }
    public Person(Integer age){
        this.age=age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    private Integer age;
    @Override
    public int compareTo(Person o) {
        return this.age<o.getAge()?1:(this.age==o.getAge()?0:-1);
    }
}

public static void main(String[] args) {
        Person[] peoples={new Person(20),new Person(50),new Person(10)};
        Arrays.sort(peoples);
        System.out.println(Arrays.toString(peoples));
    }