【疑難雜癥】new Date() 造成的線程阻塞問題
阿新 • • 發佈:2019-05-12
auth ava wait learn 發現 implement vat ole style
代碼如下
package com.learn.concurrent.probolem; import java.util.Date; import java.util.concurrent.CountDownLatch; /** * @author wx * @Description * @date 2019/05/12 18:33 */ public class DateProblem { public static void main(String[] args) { new DateProblem().execute(); }public void execute() { CountDownLatch latch = new CountDownLatch(1); new Thread(new Worker(latch)).start(); try { latch.await(); System.out.println("work has been done"); } catch (InterruptedException e) { e.printStackTrace(); } }class Worker implements Runnable { private CountDownLatch latch; public Worker(CountDownLatch latch) { this.latch = latch; } @Override public void run() { System.out.println("point 1"); System.out.println("point 2"+newDate()); latch.countDown(); } } }
在上面紅色代碼出設置一個斷點,發現只有"Point 1"這條消息輸出了,"Point 2" 這條消息沒有輸出
【疑難雜癥】new Date() 造成的線程阻塞問題