管道流的主要作用是可以进行两个线程间的通信,分为管道输出流(PipedOutputStream)和管道输入流(PipedInputStream)
如图,如果要进行管道输出,则必须把输出流连在输入流上,在 PipedOutputStream 类上有此方法用于连接管道:
public void connect(PipedInputSteam snk) throws IOException
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
class Send implements Runnable{//实现 Runnable 接口
private PipedOutputStream pos = null;//管道输出流
public Send(){
this.pos = new PipedOutputStream();//实例化输出流
}
public void run(){
String str = "Hello World !!!";
try{
this.pos.write(str.getBytes());//输出信息
}catch (IOException e){
e.printStackTrace();
}
try{
this.pos.close();//关闭输出流
}catch (IOException e){
e.printStackTrace();
}
}
public PipedOutputStream getPos() {//通过线程类得到输出流
return pos;
}
}
class Receive implements Runnable{//实例化 Runnable 接口
private PipedInputStream pis = null;
public Receive(){
this.pis = new PipedInputStream();//实例化输入流
}
public void run(){
byte b[] = new byte[1024];
int len = 0;
try{
len = this.pis.read(b);//接收数据
}catch (IOException e){
e.printStackTrace();
}
try {
this.pis.close();
}catch (IOException e){
e.printStackTrace();
}
System.out.println("接收的内容为:" + new String(b,0,len));
}
public PipedInputStream getPis() {
return pis;
}
}
public class Test{
public static void main(String[] args) {
Send s = new Send();
Receive r = new Receive();
try {
s.getPos().connect(r.getPis());//连接管道
}catch (IOException e){
e.printStackTrace();
}
new Thread(s).start();//启动线程
new Thread(r).start();//启动线程
}
}
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