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import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
public class MainClass {
public static void main (String[] args) throws IOException {
PipedOutputStream pout = new PipedOutputStream();
PipedInputStream pin = new PipedInputStream(pout);
NumberProducer fw = new NumberProducer(pout, 20);
NumberConsumer fr = new NumberConsumer(pin);
fw.start();
fr.start();
}
}
class NumberProducer extends Thread {
private DataOutputStream theOutput;
private int howMany;
public NumberProducer(OutputStream out, int howMany) {
theOutput = new DataOutputStream(out);
this.howMany = howMany;
}
public void run() {
try {
for (int i = 0; i < howMany; i++) {
theOutput.writeInt(i);
}
}
catch (IOException ex) { System.err.println(ex); }
}
}
class NumberConsumer extends Thread {
private DataInputStream theInput;
public NumberConsumer(InputStream in) {
theInput = new DataInputStream(in);
}
public void run() {
try {
while (true) {
System.out.println(theInput.readInt());
}
}
catch (IOException ex) {
if (ex.getMessage().equals("Pipe broken")
|| ex.getMessage().equals("Write end dead")) {
// normal termination
return;
}
ex.printStackTrace();
}
}
}
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