重学JAVA基础(四):线程的创建与执行-优快云博客

本文深入探讨了Java中多线程的实现方式，通过实例展示了如何继承Thread类和实现Runnable接口来创建线程，并利用线程池优化线程管理。

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1.继承Thread

public class TestThread extends Thread{

    public void run(){
        System.out.println(Thread.currentThread().getName());
    }
    
    public static void main(String[] args) {
        Thread t = new TestThread();
        t.start();
    }
}

2.实现Runnable

public class TestRunnable implements Runnable
{

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
        
    }

    public static void main(String[] args) {
        Thread t = new Thread(new TestRunnable());
        t.start();
    }
}

3.线程池

public class TestThreadPool {
    
    public static ExecutorService singlePool = Executors.newSingleThreadExecutor();
    
    private static ExecutorService fixedPool = Executors.newFixedThreadPool(2);
    
    private static ExecutorService cachedPool = Executors.newCachedThreadPool();
    
    private static ThreadPoolExecutor tpe = new ThreadPoolExecutor(5, 10, 5000, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(), new DefaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());

    private static class DefaultThreadFactory implements ThreadFactory{
        @Override
        public Thread newThread(Runnable r) {
            Thread t = new Thread(r);
            return t;
        }
    }
    
    public static void main(String[] args) {
        singlePool.execute(new TestThreadP());
        fixedPool.execute(new TestThreadP());
        cachedPool.execute(new TestThreadP());
        tpe.execute(new TestThreadP());
    }
    
    
}
class TestThreadP implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
    }
    
}