java中对象比较大小

1.实现conparable接口

2.匿名内部类（用lambda的方式写）

class Person implements Comparable<Person> {
    private String name;
    private int age;

    public Person(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age
                + "]";
    }
    /**
     * TODO重写compareTo方法实现按年龄来排序
     */
    @Override
    public int compareTo(Person o) {
        // TODO Auto-generated method stub
        return this.age-o.getAge()==0?this.name.compareTo(o.getName()):this.age-o.getAge();
    }
    public static void main(String[] args) {
        Person[] array=new Person[5];
        array[0]=new Person("cijun",2);
        array[1]=new Person("biu",1);
        array[2]=new Person("aiu",1);
        array[3]=new Person("ciu",1);
        array[4]=new Person("bhao",5);
        
//        Arrays.sort(array);//法一        
        Arrays.sort(array,(o1,o2)->{ return o1.age==o2.age?o1.name.compareTo(o2.name):o1.age-o2.age;});
        System.out.println(Arrays.toString(array));
    }
}