java JavaFX 实时时间和日期
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/42383857/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
JavaFX Live Time and Date
提问by Bryan Reyes
I am building currently an application using JavaFx with an extra feature that displays the current date and time in the top corner of the scene. Since I am new to JavaFX, I don't know how to implement this one.
我目前正在使用 JavaFx 构建一个具有额外功能的应用程序，该功能在场景的顶角显示当前日期和时间。由于我是 JavaFX 的新手，我不知道如何实现这一点。
I tried to use an old code in swing but I got an IllegalStateException Error.
我尝试在 Swing 中使用旧代码，但出现 IllegalStateException 错误。
Here's my code.
这是我的代码。
MainMenuController.java
主菜单控制器.java
@FXML private Label time;
private int minute;
private int hour;
private int second;
@FXML
public void initialize() {
Thread clock = new Thread() {
public void run() {
for (;;) {
DateFormat dateFormat = new SimpleDateFormat("hh:mm a");
Calendar cal = Calendar.getInstance();
second = cal.get(Calendar.SECOND);
minute = cal.get(Calendar.MINUTE);
hour = cal.get(Calendar.HOUR);
//System.out.println(hour + ":" + (minute) + ":" + second);
time.setText(hour + ":" + (minute) + ":" + second);
try {
sleep(1000);
} catch (InterruptedException ex) {
//...
}
}
}
};
clock.start();
}
MainMenu.fxml
主菜单文件
<children>
<Label fx:id="time" textFill="WHITE">
<font>
<Font name="Segoe UI Black" size="27.0" />
</font>
</Label>
<Label fx:id="date" textFill="WHITE">
<font>
<Font name="Segoe UI Semibold" size="19.0" />
</font>
</Label>
</children>
Main.java
主程序
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("view/MainMenu.fxml"));
primaryStage.setScene(new Scene(root,1366, 768));
primaryStage.show();
}
}
As you notice, I tested it printing the live time in the console. Yeah it worked, but the label is still static.
如您所见，我测试了它在控制台中打印实时时间。是的，它有效，但标签仍然是静态的。
回答by Shekhar Rai
I think you need FX UI Thread Platform.runLater(...)for that, but you can do something like this using Timelinein you controller class,
我认为你需要 FX UI Thread Platform.runLater(...)，但是你可以Timeline在你的控制器类中使用类似的东西，
@FXML
public void initialize() {
Timeline clock = new Timeline(new KeyFrame(Duration.ZERO, e -> {
LocalTime currentTime = LocalTime.now();
time.setText(currentTime.getHour() + ":" + currentTime.getMinute() + ":" + currentTime.getSecond());
}),
new KeyFrame(Duration.seconds(1))
);
clock.setCycleCount(Animation.INDEFINITE);
clock.play();
}
回答by WEGSY85
The @Shekhar Rai answer works well, but here is a shorter version who works pretty well too.
@Shekhar Rai 的答案效果很好，但这里有一个较短的版本，效果也很好。
@FXML
Label dateTime;
@Override
public void initialize(URL location, ResourceBundle resources) {
initClock();
}
private void initClock() {
Timeline clock = new Timeline(new KeyFrame(Duration.ZERO, e -> {
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
dateTime.setText(LocalDateTime.now().format(formatter));
}), new KeyFrame(Duration.seconds(1)));
clock.setCycleCount(Animation.INDEFINITE);
clock.play();
}
The main advantage is that you dont have to define every variables (seconds, minutes, ...)
主要优点是您不必定义每个变量（秒，分钟，...）
回答by Samer
i have a simple method it may helps you
我有一个简单的方法可以帮助你
private JFXDatePicker txtDateVenteAV;
txtDateVenteAV.setValue(LocalDate.now());
