*2.8（當前時間）程序清單2-7給出了顯示當前格林尼治時間的程序。修改這個程序，提示用戶輸入相對于GMT的時區偏移量，顯示在這個特定時區的時間

• 題目
• • 題目描述
  • 運行示例
  • 程序清單2-7（非本題代碼）+思路（注釋）
• 代碼塊

題目

題目描述

*2.8（當前時間）程序清單2-7給出了顯示當前格林尼治時間的程序。修改這個程序，提示用戶輸入相對于GMT的時區偏移量，顯示在這個特定時區的時間

運行示例

Enter the time zone offset to GMT: -5
The current time is 4:50:34

程序清單2-7（非本題代碼）+思路（注釋）

public class ShowCurrentTime {public static void main(String[] args) {// 2.8可以在這里獲取時區// Obtain the total milliseconds since midnight, Jan 1, 1970long totalMilliseconds = System.currentTimeMillis();// Obtain the total seconds since midnight, Jan 1, 1970long totalSeconds = totalMilliseconds / 1000;//2.8可以在這里將求出的秒數+時區和GMT時區的偏移（秒數）// Compute the current second in the minute in the hourlong currentSecond = totalSeconds % 60;// Obtain the total minuteslong totalMinutes = totalSeconds / 60;// Compute the current minute in the hourlong currentMinute = totalMinutes % 60;// Obtain the total hourslong totalHours = totalMinutes / 60;// Compute the current hourlong currentHour = totalHours % 24;// Display resultsSystem.out.println("Current time is " + currentHour + ":"+ currentMinute + ":" + currentSecond + " GMT");} }

代碼塊

import java.util.Scanner;public class Test2_8 {public static void main(String[] args) {Scanner input = new Scanner(System.in);System.out.println("Enter the time zone offset to GMT:");int offset = input.nextInt();// Obtain the total milliseconds since midnight, Jan 1, 1970long totalMilliseconds = System.currentTimeMillis();// Obtain the total seconds since midnight, Jan 1, 1970long totalSeconds = totalMilliseconds / 1000;totalSeconds += offset * 60 * 60;// Compute the current second in the minute in the hourlong currentSecond = totalSeconds % 60;// Obtain the total minuteslong totalMinutes = totalSeconds / 60;// Compute the current minute in the hourlong currentMinute = totalMinutes % 60;// Obtain the total hourslong totalHours = totalMinutes / 60;// Compute the current hourlong currentHour = totalHours % 24;// Display resultsSystem.out.println("Current time is " + currentHour + ":"+ currentMinute + ":" + currentSecond + " GMT");} }

總結

以上是生活随笔為你收集整理的Java黑皮书课后题第2章：*2.8（当前时间）程序清单2-7给出了显示当前格林尼治时间的程序。修改这个程序，提示用户输入相对于GMT的时区偏移量，显示在这个特定时区的时间的全部內容，希望文章能夠幫你解決所遇到的問題。

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