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最精簡的java 線程池與任務隊列
import java.util.*;
public class WorkQueue {
private final int nThreads;// 線程池的大小
private final PoolWorker[] threads;// 用數組實現線程池
private final LinkedList queue;// 任務隊列
public WorkQueue(int nThreads) {
this.nThreads = nThreads;
queue = new LinkedList();
threads = new PoolWorker[nThreads];
for (int i = 0; i < nThreads; i++) {
threads[i] = new PoolWorker();
threads[i].start();// 啟動所有工作線程
}
}
public void execute(Runnable r) {// 執行任務
synchronized (queue) {
queue.addLast(r);
queue.notify();
}
}
private class PoolWorker extends Thread {// 工作線程類
public void run() {
Runnable r;
while (true) {
synchronized (queue) {
while (queue.isEmpty()) {// 如果任務隊列中沒有任務，等待
try {
queue.wait();
} catch (InterruptedException ignored) {
}
}
r = (Runnable) queue.removeFirst();// 有任務時，取出任務
}
try {
r.run();// 執行任務
} catch (RuntimeException e) {
// You might want to log something here
}
}
}
}
public static void main(String args[]) {
WorkQueue wq = new WorkQueue(10);// 10個工作線程
Mytask r[] = new Mytask[20];// 20個任務
for (int i = 0; i < 20; i++) {
r[i] = new Mytask();
wq.execute(r[i]);
}
}
}
class Mytask implements Runnable {// 任務接口
public void run() {
String name = Thread.currentThread().getName();
try {
Thread.sleep(100);// 模擬任務執行的時間
} catch (InterruptedException e) {
}
System.out.println(name + " executed OK");
}
}
最後更新：2017-04-03 18:52:13