排序2：选择排序

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/**  * @desc: 选择排序  * @author: 毛会懂  * @create: 2020-12-23 13:52:00  **/ public class Selection {       public static void sort(Comparable[] arr){         for(int i = 0; i < arr.length - 1;i++){             int minIndex = i;             for(int j = i + 1;j < arr.length;j++){                 if(isExchange(arr[minIndex],arr[j])){                     minIndex = j;                 }             }             //没有选择到更小的data，则不交换             if(i != minIndex) {                 swap(arr, i, minIndex);             }         }     }       private static Boolean isExchange(Comparable o1,Comparable o2){         return o1.compareTo(o2) > 0;     }       private static void swap(Comparable[] arr,int i,int j){         Comparable temp = arr[i];         arr[i] = arr[j];         arr[j] = temp;     } }   //选择排序 public static void main(String[] args) {     Integer[] arr = {10,8,20,30,5,7,4,12,40,30,1,2,4,3,100,5,32,45,23,66,45,7,55,79,6};     Selection.sort(arr);     Arrays.asList(arr).forEach(System.out::println);       Person[] persions = {new Person("b",11),new Person("a",10),new Person("c",12),new Person("b",111),             new Person("a",5),new Person("c",4)};     Insertion.sort(persions);     for (Person person : persions) {         System.out.println(person);     } }   附： /**  * @desc: 实现Comparable接口  * @author: 毛会懂  * @create: 2020-12-23 13:36:00  **/ public class Person implements Comparable<Person>{     private String name;       private Integer age;       public Person(String name, Integer age) {         this.name = name;         this.age = age;     }       public String getName() {         return name;     }       public void setName(String name) {         this.name = name;     }       public Integer getAge() {         return age;     }       public void setAge(Integer age) {         this.age = age;     }       @Override     public String toString() {         return "Persion{" +                 "name='" + name + '\'' +                 ", age=" + age +                 '}';     }       @Override     public int compareTo(Person o) {         return this.age - o.getAge();     } }