题解 | #实现接口#

public class Main {

    public static void main(String[] args) {
        Comparator comparator = new ComparatorImpl();

        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            System.out.println(comparator.max(x, y));
        }
    }

}

interface Comparator {
    /**
     * 返回两个整数中的最大值
     */
    int max(int x, int y);
}

//write your code here......

class ComparatorImpl implements Comparator{//一个类只有public class作为一个文件的唯一入口
     
    @Override
     public int max(int x, int y){
         if(x < y){
             int tem = x;
             x = y;
             y = tem;
             
         }
         return x;
     }
    
   
}