//封裝一個排序類
package com.lanou.jk;
public interface Sort {
//規(guī)則
public int sort(Object obj,Object obj1);
}

class Test {
    //接收用戶定義的排序規(guī)則的類
    public Sort s;
    public Test(Sort s){
        this.s = s;//不寫無參數(shù)的意味著必須給個s否則不能用
    }
    public Object[] paixu(Object[] obj){
        for (int i = 0; i < obj.length - 1; i++) {
            for (int j = 0; j < obj.length - i - 1; j++) {
                //判斷大小
                int result = s.sort(obj[j], obj[j+1]);
                 if (result > 0) {  
                    Object temp = obj[j];
                    obj[j] = obj[j+1];
                    obj[j+1] = temp;
                }
                //交換 
            }
            
        }
        return obj;
    }

}
//用戶類
package com.lanou.jk;

import java.util.Arrays;

public class User {
public static void main(String[] args) {
//數(shù)據(jù)
Cat c = new Cat();
c.age = 12;
c.score = 99;

    Cat c1 = new Cat();
    c1.age = 4;
    c1.score = 55;
    
    Cat c2 = new Cat();
    c2.age = 9;
    c2.score = 88;
    
    Cat c3 = new Cat();
    c3.age = 21;
    c3.score = 85;

        //創(chuàng)建一個數(shù)組
        Cat[] arr = {c,c1,c2,c3};
        //創(chuàng)建test接收的類
        com cm= new com();
        Test test = new Test(cm);
        //接收排序的結(jié)果
        Object[] newArr = test.paixu(arr);
        //打印輸出
        System.out.println(Arrays.toString(newArr));

}

}
//Sort接口的實現(xiàn)類
class com implements Sort {
@Override
public int sort(Object obj, Object obj1) {

        //強轉(zhuǎn)轉(zhuǎn)換類型
        Cat c = (Cat)obj;
        Cat c1 = (Cat)obj1;
        //利用Sort方法進行比較
        if (c.score > c1.score) {
            return 1;
        }   
        return -1;
    }

}
//數(shù)據(jù)類
class Cat{
int age;
int score;
@Override
public String toString() {
// TODO Auto-generated method stub
return "年齡 = "+ this.age + "分數(shù)"+ this.score;
}
}