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// : c13:PipedIO.java
// Using pipes for inter-thread I/O
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.util.Timer;
import java.util.TimerTask;
import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.util.Random;
class Sender extends Thread {
private Random rand = new Random();
private PipedWriter out = new PipedWriter();
public PipedWriter getPipedWriter() {
return out;
}
public void run() {
while (true) {
for (char c = 'A'; c <= 'z'; c++) {
try {
out.write(c);
sleep(rand.nextInt(500));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}
}
class Receiver extends Thread {
private PipedReader in;
public Receiver(Sender sender) throws IOException {
in = new PipedReader(sender.getPipedWriter());
}
public void run() {
try {
while (true) {
// Blocks until characters are there:
System.out.println("Read: " + (char) in.read());
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
public class PipedIO {
public static void main(String[] args) throws Exception {
Sender sender = new Sender();
Receiver receiver = new Receiver(sender);
sender.start();
receiver.start();
new Timeout(4000, "Terminated");
}
} ///:~
class Timeout extends Timer {
public Timeout(int delay, final String msg) {
super(true); // Daemon thread
schedule(new TimerTask() {
public void run() {
System.out.println(msg);
System.exit(0);
}
}, delay);
}
} ///:~
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