Java线程间通信：使用管道

管道输入/输出流和普通的文件输入/输出流或者网络输入/输出流不同之处在于，它主要用于线程之间的数据传输，而传输的媒介为内存。

管道输入/输出流主要包括了如下4种具体实现：PipedOutputStream、PipedInputStream、PipedReader和PipedWriter，前两种面向字节，而后两种面向字符。

package gj.concurrent.sync;

import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;

/**
 * Author: areful
 */
public class PipedSync {
    private static class Writer implements Runnable {
        private PipedWriter out;

        private Writer(PipedWriter writer) {
            out = writer;
        }

        @Override
        public void run() {
            int receive;
            try {
                while ((receive = System.in.read()) != -1) {
                    out.write(receive);
                }
            } catch (Exception ignored) {
            } finally {
                try {
                    out.close();
                } catch (IOException ignored) {
                }
            }
        }
    }

    private static class Printer implements Runnable {
        private PipedReader in;

        private Printer(PipedReader in) {
            this.in = in;
        }

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

    public static void main(String[] args) throws Exception {
        PipedWriter out = new PipedWriter();
        PipedReader in = new PipedReader();
        out.connect(in);

        Thread printThread = new Thread(new Printer(in), "PrintThread");
        printThread.start();

        Thread writeThread = new Thread(new Writer(out), "WriteThread");
        writeThread.start();
    }
}