JAVA并发编程的书有很多，对我胃口的就这一本：《Java并发编程从入门到精通》。

不厚，但从入门讲起。

今天实践了三种线程的简单实现。

ThreadA

package demo.thread;public class ThreadA extends Thread {	public void run() {		super.run();		try {			Thread.sleep(500L);		} catch (InterruptedException e) {			e.printStackTrace();		}		System.out.println("This is thread A.");	}}

ThreadB

package demo.thread;public class ThreadB implements Runnable {	public void run() {		try {			Thread.sleep(600L);		} catch (InterruptedException e) {			e.printStackTrace();		}		System.out.println("This is thread B.");	}}

ThreadC

package demo.thread;import java.util.concurrent.Callable;public class ThreadC implements Callable
    
      {	public String call() throws Exception {		try {			Thread.sleep(500L);		} catch (InterruptedException e) {			e.printStackTrace();		}		System.out.println("This is thread C.");		return "thread C";	}}
    

ThreadMain

package demo.thread;import java.util.concurrent.ExecutionException;import java.util.concurrent.FutureTask;public class ThreadMain {	public static void main(String[] args) {		ThreadA threadA = new ThreadA();		threadA.start();				ThreadB threadB = new ThreadB();		new Thread(threadB).start();				ThreadC threadC = new ThreadC();		FutureTask
    
      future = new FutureTask
     
      (threadC);		new Thread(future).start();				System.out.println("This is main thread.");		System.out.println("This is main thread begin.");				try {			System.out.println("threadC return value: " + future.get());		} catch (InterruptedException e) {			e.printStackTrace();		} catch (ExecutionException e) {			e.printStackTrace();		}				System.out.println("This is main thread end.");	}}
     
    

输出样子