Java多线程-处理线程的返回值
发布时间：2020-12-15 01:59:09 所属栏目：Java 来源：网络整理
导读：一、主线程等待法：优点：实现简单，缺点：代码冗余 package com.test.thread;public class CycleWait implements Runnable { private String value; @Override public void run() { try { Thread.sleep(5000); } catch (InterruptedException e) { e.printS
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一、主线程等待法：优点：实现简单，缺点：代码冗余package com.test.thread;
public class CycleWait implements Runnable {
private String value;
@Override
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
value = "we have data now";
}
public static void main(String[] args) throws InterruptedException {
CycleWait cycleWait = new CycleWait();
Thread t = new Thread(cycleWait);
t.start();
while (cycleWait.value == null) {
Thread.sleep(100);
}
System.out.println(cycleWait.value);
}
}
运行结果: we have data now 二、使用Thread类的join()阻塞当前线程，以等待子线程处理完毕。优点：比“主线程等待法”更简单 缺点：粒度更细package com.test.thread;
public class CycleWait implements Runnable {
private String value;
@Override
public void run() {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
value = "we have data now";
}
public static void main(String[] args) throws InterruptedException {
CycleWait cycleWait = new CycleWait();
Thread t = new Thread(cycleWait);
t.start();
// join方法，在start后
t.join();
System.out.println(cycleWait.value);
}
}
三、通过Callable接口实现：通过FutureTask 或者 线程池获取（编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
