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| import cn.hutool.core.date.DateUtil;
import junit.framework.TestCase;
import java.util.concurrent.*;
public class TestJug extends TestCase {
public void testNewCachedThreadPool() throws InterruptedException {
ExecutorService executorService = Executors.newCachedThreadPool();
for (int i = 0; i < 10; i++) {
final int index = i;
executorService.execute(() -> {
// 获取线程名称,默认格式:pool-1-thread-1
System.out.println(DateUtil.now() + " " + Thread.currentThread().getName() + " " + index);
// 等待2秒
sleep(TimeUnit.SECONDS,2);
});
}
executorService.awaitTermination(3, TimeUnit.SECONDS);
}
public void testNewFixedThreadPool() throws InterruptedException {
ExecutorService executorService = Executors.newFixedThreadPool(5);
for (int i = 0; i < 10; i++) {
final int index = i;
executorService.execute(() -> {
// 获取线程名称,默认格式:pool-1-thread-1
System.out.println(DateUtil.now() + " " + Thread.currentThread().getName() + " " + index);
// 等待2秒
sleep(TimeUnit.SECONDS,2);
});
}
executorService.awaitTermination(3, TimeUnit.SECONDS);
}
public void testNewSingleThreadPool() throws InterruptedException {
ExecutorService executorService = Executors.newSingleThreadExecutor();
for (int i = 0; i < 10; i++) {
final int index = i;
executorService.execute(() -> {
// 获取线程名称,默认格式:pool-1-thread-1
System.out.println(DateUtil.now() + " " + Thread.currentThread().getName() + " " + index);
// 等待1秒
sleep(TimeUnit.MILLISECONDS,1000);
});
}
executorService.awaitTermination(11, TimeUnit.SECONDS);
}
public void testNewScheduledThreadPool() throws InterruptedException {
ScheduledExecutorService executorService = Executors.newScheduledThreadPool(3);
System.out.println(DateUtil.now() + " 提交任务");
for (int i = 0; i < 10; i++) {
final int index = i;
executorService.execute(() -> {
// 获取线程名称,默认格式:pool-1-thread-1
System.out.println(DateUtil.now() + " " + Thread.currentThread().getName() + " " + index);
// 等待1秒
sleep(TimeUnit.SECONDS,1);
});
}
executorService.awaitTermination(6, TimeUnit.SECONDS);
}
public void testCreateThreadPool() throws InterruptedException {
//阻塞队列和拒绝策略根据实际情况可自行选择
ExecutorService executorService = new ThreadPoolExecutor(2, 10,
1, TimeUnit.MINUTES, new ArrayBlockingQueue<>(5, true),
Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());
for (int i = 0; i < 10; i++) {
final int index = i;
executorService.execute(() -> {
// 获取线程名称,默认格式:pool-1-thread-1
System.out.println(DateUtil.now() + " " + Thread.currentThread().getName() + " " + index);
// 等待2秒
sleep(TimeUnit.SECONDS,2);
});
}
executorService.awaitTermination(5, TimeUnit.SECONDS);
}
private void sleep(TimeUnit timeUnit,int time){
try {
timeUnit.sleep(time);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
|