[英]How do I calculate the elapsed time from a Java Swing Timer
我有一個來自 javax.swing.Timer 的 Timer 實例,我正在嘗試計算冷卻剩余的時間,因為我將它用於命令。
我正在測試它有 15 秒的冷卻時間。 冷卻效果很好,但我希望能夠發布當我達到 5 - 10 分鍾等更大的冷卻時間時剩余的時間。我想說 00:00:15 剩余 00:00:14 剩余 00: 00:13 剩余等
我知道我在這里遺漏了一些東西。
下面我把代碼用來計算經過的時間和從 Millis 到 HMS 的轉換當命令被調用時,開始時間設置為 currentTimeMillis()
long startTime = System.currentTimeMillis();
public void callWithCooldown(int cooldown) {
ActionListener callMethod = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
enable();
}
};
boolean didCall = call();
if(!didCall) return;
disable();
this.timer = new Timer(cooldown, callMethod);
timer.setRepeats(false);
this.startTime = System.currentTimeMillis();
timer.start();
String notification = "Cooldown activated for " + MathHelper.millisecondsToHMS(cooldown) + "!";
System.out.println(notification);
notify(notification);
}
public String elapsedTime() {
long now = System.currentTimeMillis();
long endTime = (startTime + cooldown);
int elapsed = (int) (endTime - now);
System.out.println(elapsed);
return millisecondsToHMS(Math.abs(elapsed));
}
public static String millisecondsToHMS(int milliseconds) {
String time = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(milliseconds),
TimeUnit.MILLISECONDS.toMinutes(milliseconds) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(milliseconds)),
TimeUnit.MILLISECONDS.toSeconds(milliseconds) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(milliseconds)));
return time;
}
您可以創建兩個Timer
對象。 一個是等待的總時間,一個是倒計時:
import javax.swing.Timer;
public class Main {
private static long START;
public static void main(final String[] args) {
final int totalSeconds = 15;
final Timer tm = new Timer(1000, e -> {
System.out.println("Seconds remaining: " + (totalSeconds * 1000 - System.currentTimeMillis() + START) / 1000d);
});
START = System.currentTimeMillis();
new Timer(totalSeconds * 1000, e -> {
tm.stop();
System.out.println("Finished!");
}).start();
tm.start();
//Wait for the program to execute:
try { Thread.sleep((totalSeconds + 2) * 1000); } catch (final InterruptedException ix) {}
}
}
雖然我認為Timer
並不是解決此類問題的最准確的方法(取決於您希望它的准確程度),但它是一個簡單的方法。
或者在您的代碼中,這可能是:
import java.util.concurrent.TimeUnit;
import javax.swing.Timer;
public class Main {
private long startTime;
private final Timer total, countDown;
public Main() {
countDown = new Timer(1000, e -> System.out.println(elapsedTime()));
total = new Timer(2000, e -> { //Defaults to 2000 ms for example.
countDown.stop();
enable();
});
total.setRepeats(false);
}
public void enable() {
System.out.println("Enable!");
}
public void callWithCooldown(int cooldownSeconds) {
total.setInitialDelay(cooldownSeconds * 1000);
startTime = System.currentTimeMillis();
total.start();
countDown.start();
}
public String elapsedTime() {
long now = System.currentTimeMillis();
long endTime = (startTime + total.getInitialDelay());
int elapsed = (int) (endTime - now);
return millisecondsToHMS(Math.abs(elapsed));
}
public static String millisecondsToHMS(int milliseconds) {
String time = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(milliseconds),
TimeUnit.MILLISECONDS.toMinutes(milliseconds) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(milliseconds)),
TimeUnit.MILLISECONDS.toSeconds(milliseconds) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(milliseconds)));
return time;
}
public static void main(final String[] args) {
final int seconds = 15;
new Main().callWithCooldown(seconds);
//Let the program run for 'seconds' seconds at least to show all messages:
try { Thread.sleep((seconds + 2) * 1000); } catch (final InterruptedException ix) {}
}
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.