题目要求

定义一个Person类(name,age,job),初始化Person对象数组，有3个person对象，按照age从小到大进行排序 使用冒泡排序

使用知识点

1. 构造器，构造方法

2.重写toString方法

3.冒泡排序

源码

public class Exercise01 {
    
    public static void main(String[] args) {
        Person[] people = new Person[3];
        people[0] = new Person("刘备",22,"卖草鞋");
        people[1] = new Person("张飞",34,"杀猪的");
        people[2] = new Person("关羽",18,"卖鞋的");

        //排序前的顺序
        for (int i = 0; i < people.length; i++) {
            // 直接输出一个对象 会默认调用toString方法
            System.out.println(people[i]);
        }
        // 冒泡排序 (从小到大)
        //定义一个中间变量 类型必须是Person
        Person temp = null;
        for (int i = 0; i < people.length - 1; i++) {
            for (int j = 0; j  people[j + 1].getAge()) {
                    temp = people[j];
                    people[j] = people[j + 1];
                    people[j + 1] = temp;
                }
            }
        }
        System.out.println("======排序后======");
        for (int i = 0; i < people.length; i++) {
            // 直接输出一个对象 会默认调用toString方法
            System.out.println(people[i]);
        }
    }
}
class Person {
    private String name;
    private int age;
    private String job;

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

    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;
    }

    public String getJob() {
        return job;
    }

    public void setJob(String job) {
        this.job = job;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + ''' +
                ", age=" + age +
                ", job='" + job + ''' +
                '}';
    }
}