Java Concurrency - ThreadFactory, 使用工厂方法创建线程

当需要创建多个类似的线程实例时，使用工厂模式替代 new 操作符创建线程，能使代码更为简洁，易于维护。JDK 提供了 java.util.concurrent.ThreadFactory 接口，ThreadFactory 只有一个方法 newThread，它接收一个 Runnable 参数，返回一个 Thread 实例。

public class DaemonThreadFactory implements ThreadFactory {

@Override
public Thread newThread(Runnable task) {
Thread thread = new Thread(task);
thread.setDaemon(true);
return thread;
}

}

public class Task implements Runnable {

@Override
public void run() {
try {
Thread.sleep(1000L);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}

public class Main {

public static void main(String[] args) {

DaemonThreadFactory daemonThreadFactory = new DaemonThreadFactory();
for (int i = 0; i < 3; i++) {
Thread thread = daemonThreadFactory.newThread(new Task());
thread.start();
}

}

}