import java.util.Scanner; 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{ public int max(int x,int y) { return x>y?x:y; } }