前言

jdk 1.8

獲取當前項目所有的線程

代碼

import java.util.Random;public class Test {public static void main(String[] args) {Test t = new Test();t.initThreadContext();try {Thread.sleep(5 * 1000);} catch (InterruptedException e) {}t.printAllThread();}public void printAllThread(){// 遍歷線程組樹，獲取根線程組ThreadGroup topGroup =Thread.currentThread().getThreadGroup();while (topGroup.getParent()!=null){// 返回此線程組的父線程組topGroup=topGroup.getParent();}// 線程數(shù)組大小為當前活動線程數(shù)量的2倍。Thread[] tmpThreadList = new Thread[topGroup.activeCount() * 2];// 獲取根線程組下的所有線程 int actualSize = topGroup.enumerate(tmpThreadList); // 拷貝到一個新的數(shù)組，數(shù)組長度為實際長度Thread[] threadList = new Thread[actualSize]; System.arraycopy(tmpThreadList, 0, threadList, 0, actualSize); // 打印for (Thread thread : threadList) {System.out.println(" 線程id：" + thread.getId() + " 線程名稱：" + thread.getName() + " 線程狀態(tài)：" + thread.getState());}}public void initThreadContext() {for (int i=0; i<10; i++) {Thread t = new Thread() {public void run() {Random random = new Random();int times = random.nextInt(10) + 1;System.out.println("thread " + this.getId() + " started, run " + times + " seconds");for (int i=0; i<times; i++) {try {Thread.sleep(1000);} catch (InterruptedException e) {}}System.out.println("thread " + this.getId() + " done");}};t.start();}} }

執(zhí)行結(jié)果

thread 10 started, run 8 seconds thread 12 started, run 1 seconds thread 11 started, run 3 seconds thread 13 started, run 6 seconds thread 14 started, run 1 seconds thread 15 started, run 7 seconds thread 17 started, run 7 seconds thread 16 started, run 2 seconds thread 18 started, run 2 seconds thread 19 started, run 3 seconds thread 12 done thread 14 done thread 18 done thread 16 done thread 19 done thread 11 done 線程id：2 線程名稱：Reference Handler 線程狀態(tài)：WAITING 線程id：3 線程名稱：Finalizer 線程狀態(tài)：WAITING 線程id：4 線程名稱：Signal Dispatcher 線程狀態(tài)：RUNNABLE 線程id：5 線程名稱：Attach Listener 線程狀態(tài)：RUNNABLE 線程id：1 線程名稱：main 線程狀態(tài)：RUNNABLE 線程id：10 線程名稱：Thread-0 線程狀態(tài)：TIMED_WAITING 線程id：13 線程名稱：Thread-3 線程狀態(tài)：TIMED_WAITING 線程id：15 線程名稱：Thread-5 線程狀態(tài)：TIMED_WAITING 線程id：17 線程名稱：Thread-7 線程狀態(tài)：TIMED_WAITING thread 13 done thread 15 done thread 17 done thread 10 done

總結(jié)

以上是生活随笔為你收集整理的【Java】 获取当前项目所有的线程的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。