在java.sql.Time中localTime可以连续增加1秒吗？

Question

在java.time.LocalTime ，有addSeconds()方法。 可以用来连续增加1秒吗？

LocalTime localTime = Time.valueOf("00:00:00").toLocalTime();
localTime = localTime.plusSeconds(1L);
String output = localTime.toString();
whiteTime = Time.valueOf(output);

我从 Intellij 添加了这部分错误消息。

00:00:58
respond to action of white: Black Time
00:00:59
respond to action of white: Black Time
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException
    at java.sql/java.sql.Time.valueOf(Time.java:109)
    at ui.TimerPanel.blackTimerTikTok(TimerPanel.java:71)
    at util.GameModel$2.actionPerformed(GameModel.java:87)
    at java.desktop/javax.swing.Timer.fireActionPerformed(Timer.java:317)
    at java.desktop/javax.swing.Timer$DoPostEvent.run(Timer.java:249)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:389)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

当它到达00:00:59时，它看起来会出错。 如何使其00:01:00连续计数秒？

Answer 1

问题是您正在使用java.sql.Time.valueOf(String)并依赖于LocalTime.toString()格式，该格式可能不会打印秒数，因为：

所使用的格式将是输出完整时间值的最短格式，其中省略部分隐含为零。

您应该使用Time.valueOf(LocalTime) ：

LocalTime localTime = Time.valueOf("00:00:59").toLocalTime();
localTime = localTime.plusSeconds(1);
System.out.println(Time.valueOf(localTime)); // 00:01:00

Answer 2

要添加到什么@Karol Dowbecki回答，如果你需要用你的字符串表示LocalTime ，你可以使用DateTimeFormatter保持一致的格式：

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");

String output = localTime.format(formatter);
whiteTime = Time.valueOf(output);

这将在时间滚动时输出00:01:00并且不会给您错误