インタフェースの適用_ソートの実装

public interface Sort {
    //  
    public int sort(Object obj,Object obj1);
}

class Test {
    //           (         ) 
    public Sort s;
    //                          
    public Test(Sort s) {
        this.s = s;
    }
    //      ,         ,
    public Object[] paixu(Object[] obj) {
        //       
        for (int i = 0; i < obj.length - 1; i++) {
            for (int j = 0; j < obj.length - i - 1; j++) {
                //    (                           ,,)
                //                   sort  ,      ., int   ;             
                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;
                }
            }
        }
        return obj;
    }
}

class Cat {
    int age;
    int score;
    //              ,
    @Override
    public String toString() {
        return "  =" + this.age + "  =" + this.score;
    }
}

//Sort      
class Com implements Sort {
    //          ;
    @Override
    public int sort(Object obj, Object obj1) {
        // obj     Cat  
        Cat cat = (Cat)obj;
        Cat cat2 = (Cat)obj1;
        //    cat       
        if (cat.score > cat2.score) {
            return 1;
        }
        return -1;
    }
    
}

public static void main(String[] args) {
        //        4 Cat  ;
        Cat cat1 = new Cat();
        cat1.age = 12;
        cat1.score = 13;
        
        Cat cat2 = new Cat();
        cat2.age = 13;
        cat2.score = 20;
        
        Cat cat3 = new Cat();
        cat3.age = 10;
        cat3.score = 14;
        
        Cat cat4 = new Cat();
        cat4.age = 15;
        cat4.score = 23;
        
        //      ,,  Cat       ;
        Cat[] arr = {cat1,cat2,cat3,cat4};
        //            
        Com com = new Com();
        // con    Test 
        Test test = new Test(com);
        //  Test      .          .
        Object[] newArr = test.paixu(arr);
        //      
        System.out.println(Arrays.toString(newArr));
        
    }