我需要生成monotonically Increasing integers。
我能否利用时间来做些什么,产生这种分类的分类?
我当时会要求进行愤怒,而我却在同一秒钟中要求不止一次的愤怒——如果我这样做的话,如果我在这个二天间穿过同样的愤怒的话,我会赢得思想。
我需要生成monotonically Increasing integers。
我能否利用时间来做些什么,产生这种分类的分类?
我当时会要求进行愤怒,而我却在同一秒钟中要求不止一次的愤怒——如果我这样做的话,如果我在这个二天间穿过同样的愤怒的话,我会赢得思想。
您可使用rel=“nofollow”>AtomicInteger
反对保持一种安全屏障。 然后使用getAndIncrement (。 当你们需要下一个愤怒的时候。
由于单逐年增加的愤怒不必是毗连的(只要数量持续增加,就会出现差距),因此,正如你想要在第二季度发出的所有呼吁来回same integer,这一回归方法将多少转而采用联合核查机制。
这里的简单实施是:
private static long startTime = System.currentTimeMillis();
public static int secondsSinceStart() {
return (int) TimeUnit.SECONDS.convert(
System.currentTimeMillis() - startTime, TimeUnit.MILLISECONDS);
}
该法案将持续68年。
这是我自发的创造者......
public final class IdGenerator {
private static final int MAGNITUDE = 10000;
private static long previousTimestamp;
private static int counter = 0;
private IdGenerator() {
}
public synchronized static long generateId() {
final long timeMillis = System.currentTimeMillis();
if (previousTimestamp != timeMillis) {
counter = 0;
}
previousTimestamp = timeMillis;
final int counterValue = counter++;
if (counterValue >= MAGNITUDE) {
//just to be sure
throw new IllegalStateException("too many id generated for a single timestamp!");
}
return timeMillis * MAGNITUDE + counterValue;
}
}
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