管道流的主要作用可以用于两个线程之间的通信，有管道输出流 PipeOutputStream和管道输入流 PipeInputStream。然后通过connect将两个管道连接起来。
import java.io.PipedInputStream;
import java.io.PipedOutputStream; class Send implements Runnable{
private PipedOutputStream pos = null; public Send() {
// TODO Auto-generated constructor stub
pos = new PipedOutputStream();
} @Override
public void run() {
// TODO Auto-generated method stub
String str = "Hello world!";
try {
pos.write(str.getBytes());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
} try {
pos.close();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
} public PipedOutputStream getPos() {
return pos;
}
} class Receive implements Runnable{
private PipedInputStream pis = null; public Receive() {
// TODO Auto-generated constructor stub
pis = new PipedInputStream();
} public PipedInputStream getPis() {
return pis;
} @Override
public void run() {
// TODO Auto-generated method stub
byte[] b = new byte[1024];
int len = 0;
try {
len = pis.read(b);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
} try {
pis.close();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
} System.out.println(new String(b, 0, len));
} } public class PipeDemo01 { public static void main(String[] args) {
// TODO Auto-generated method stub
Send s = new Send();
Receive r = new Receive();
try {
s.getPos().connect(r.getPis());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
} new Thread(s).start();
new Thread(r).start();
} }