java线程同步之管道通信

之前看书的时候就看过，线程之间通信的两种方式，共享变量和管道通信，一直不知道管道通信是什么，今天终于看到了，话不多数，直接show the code

public class Pipe {
    public static void main(String[] args) throws IOException, InterruptedException {
        PipedWriter out = new PipedWriter();
        PipedReader in = new PipedReader();
        int recive = 0;
        out.connect(in);
        Thread printThread = new Thread(new PrintThread(in),"printThread");
        TimeUnit.SECONDS.sleep(5);
        printThread.start();
        while ((recive = System.in.read()) != -1){
            out.write(recive);
        }
    }
    static class PrintThread implements Runnable{

        private PipedReader in;

        public PrintThread(PipedReader in) {
            this.in = in;
        }

        public void run() {
            try {
                int recive = 0;
                while ( (recive = in.read())  != -1){
                    System.out.print( (char) recive);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

//控制台输出：
123
printThread 1
printThread 2
printThread 3

注意一点就是

        out.connect(in);

这一句，其实很好理解，两个管道要连通才可以生效，不然就会出问题