java线程-线程间通信
Posted z.arbitrary
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方法一 通过访问共享变量的方式(注:需要处理同步问题)
方法二 通过管道流
其中方法一有两种实现方法,即
方法一a)通过内部类实现线程的共享变量
public class Innersharethread { public static void main(String[] args) { Mythread mythread = new Mythread(); mythread.getThread().start(); mythread.getThread().start(); mythread.getThread().start(); mythread.getThread().start(); } } class Mythread { int index = 0; private class InnerThread extends Thread { public synchronized void run() { while (true) { System.out.println(Thread.currentThread().getName() + "is running and index is " + index++); } } } public Thread getThread() { return new InnerThread(); } } /** * 通过内部类实现线程的共享变量 * */ public class Innersharethread { public static void main(String[] args) { Mythread mythread = new Mythread(); mythread.getThread().start(); mythread.getThread().start(); mythread.getThread().start(); mythread.getThread().start(); } } class Mythread { int index = 0; private class InnerThread extends Thread { public synchronized void run() { while (true) { System.out.println(Thread.currentThread().getName() + "is running and index is " + index++); } } } public Thread getThread() { return new InnerThread(); } }
b)通过实现Runnable接口实现线程的共享变量
public class Interfacaesharethread { public static void main(String[] args) { Mythread mythread = new Mythread(); new Thread(mythread).start(); new Thread(mythread).start(); new Thread(mythread).start(); new Thread(mythread).start(); } } /* 实现Runnable接口 */ class Mythread implements Runnable { int index = 0; public synchronized void run() { while (true) System.out.println(Thread.currentThread().getName() + "is running and the index is " + index++); } } /** * 通过实现Runnable接口实现线程的共享变量 */ public class Interfacaesharethread { public static void main(String[] args) { Mythread mythread = new Mythread(); new Thread(mythread).start(); new Thread(mythread).start(); new Thread(mythread).start(); new Thread(mythread).start(); } } /* 实现Runnable接口 */ class Mythread implements Runnable { int index = 0; public synchronized void run() { while (true) System.out.println(Thread.currentThread().getName() + "is running and the index is " + index++); } }
方法二(通过管道流):
public class CommunicateWhitPiping { public static void main(String[] args) { /** * 创建管道输出流 */ PipedOutputStream pos = new PipedOutputStream(); /** * 创建管道输入流 */ PipedInputStream pis = new PipedInputStream(); try { /** * 将管道输入流与输出流连接 此过程也可通过重载的构造函数来实现 */ pos.connect(pis); } catch (IOException e) { e.printStackTrace(); } /** * 创建生产者线程 */ Producer p = new Producer(pos); /** * 创建消费者线程 */ Consumer c = new Consumer(pis); /** * 启动线程 */ p.start(); c.start(); } } /** * 生产者线程(与一个管道输入流相关联) * */ class Producer extends Thread { private PipedOutputStream pos; public Producer(PipedOutputStream pos) { this.pos = pos; } public void run() { int i = 8; try { pos.write(i); } catch (IOException e) { e.printStackTrace(); } } } /** * 消费者线程(与一个管道输入流相关联) * */ class Consumer extends Thread { private PipedInputStream pis; public Consumer(PipedInputStream pis) { this.pis = pis; } public void run() { try { System.out.println(pis.read()); } catch (IOException e) { e.printStackTrace(); } } }
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