本文部分摘自《Java 并发编程的艺术》
管道输入 / 输出流
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,而传输媒介为内存
管道输入 / 输出流主要包括如下四种具体实现:
- PipedOutputStream、PipedInputStream
- PipedReader、PipedWriter
前两种面向字节,后两种面向字符
下面的例子中,main 线程通过 PipedWriter 向 printThread 线程写入数据,printThread 线程通过 PipedReader 将读取数据并打印
public class Piped {public static void main(String[] args) throws IOException {PipedWriter out = new PipedWriter();PipedReader in = new PipedReader();// 将输入流和输出流进行连接,否则在使用时会抛出 IOExceptionout.connect(in);Thread printThread = new Thread(new Print(in), "PrintThread");printThread.start();int receive = 0;try {while ((receive = System.in.read()) != -1) {out.write(receive);}} finally {out.close();}}static class Print implements Runnable {private PipedReader in;public Print(PipedReader in) {this.in = in;}@Overridepublic void run() {int receive = 0;try {while ((receive = in.read()) != -1) {System.out.print((char) receive);}} catch (IOException e) {e.printStackTrace();}}}}
运行结果如下