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java | join 原理
source link: https://benpaodewoniu.github.io/2022/12/18/java111/
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java | join 原理
join 是等待线程终止。它的原理和 java | 设计模式 同步模式-保护性暂停 优化 超时 等待线程超时是一样的。
public final synchronized void join(long millis)
throws InterruptedException {
long base = System.currentTimeMillis();
long now = 0;
if (millis < 0) {
throw new IllegalArgumentException("timeout value is negative");
}
if (millis == 0) {
while (isAlive()) {
wait(0);
}
} else {
while (isAlive()) {
long delay = millis - now;
if (delay <= 0) {
break;
}
wait(delay);
now = System.currentTimeMillis() - base;
}
}
}
和 java | 设计模式 同步模式-保护性暂停 优化 超时 是一样的原理。
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