java冒泡排序什么毛病

Question

package com.wk.tt;

public class t {
    public static void main(String[] args) {
        person [] persons=new  person  [3];
       persons[0] = new person("刷个",18,"演员");
      persons[1] = new person("李白", 24, "诗人");
      persons [2]=new person("杜甫",30,"杜甫");
      for(int i=0;i<persons.length-1;i++){
          for(int j=0;j< persons.length-i-1;j++){
              if(persons[j].getAge()>persons[j+1].getAge()){
                  int tmp=0;
                  tmp=persons[j].getAge();
                  persons[j].getAge()=persons[j+1].getAge();
                  persons[j+1].getAge()=tmp;
                  
                  
              }
          }
      }
        
        
        

    }
}

Answer 1

• 你这 只是交换了局部变量的 age 吧，也没有将对应数据设置到person类里，另外 其他的数据也还是原来
• 参考如下：

import java.util.Arrays;

public class Main {

    public static void main(String[] args) {
        person[] persons= new  person  [3];
        persons[0] = new person("刷个",25,"演员");
        persons[1] = new person("李白", 24, "诗人");
        persons [2]=new person("杜甫",30,"诗人");
        for(int i=0;i<persons.length-1;i++){
            for(int j=0;j< persons.length-i-1;j++){
                if(persons[j].getAge()>persons[j+1].getAge()){
                    person tmp = persons[j];
                    persons[j] = persons[j+1];
                    persons[j+1] = tmp;
                }
            }
        }
        System.out.println(Arrays.toString(persons));
    }

    private static 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 + '\'' +
                    '}';
        }
    }
}