输入一个数字作为秒数，按小时，分钟，秒

 import java.util.Scanner;public class Time2 { public static void main(String[] args) { System.out.println("请输入秒数"); Scanner sc = new Scanner(System.in); int second = sc.nextInt(); int hours = second / 3600; int minutes = second % 3600 /60; int seconds = second % 3600 % 60; if(hours<10){ System.out.print("0"+hours+":"); }else{ System.out.print(hours+":"); } if(minutes<10){ System.out.print("0"+minutes+":"); }else{ System.out.print(minutes+":"); } if(seconds<10){ System.out.print("0"+seconds); }else{ System.out.print(seconds); } }}