/**

*

*/

import java.util.Random;

/**

* Shows an example of multi-threading.

*

* @author Massimiliano "Maxi" Zattera

*

*/

public class MultiThreadDemo extends Thread {

private final static Random rnd = new Random(666);

private final String name;

// must do this as strings are not garbage collected and wil cause out of memory

private final String sleepMsg;

private final String wakeUpMsg;

private MultiThreadDemo(String name) {

this.name = name;

sleepMsg = name + " is going to sleep...";

wakeUpMsg = name + " wakes up and says hello! :-)";

System.out.println(name + " created.");

}

@Override

public void run() {

while (true) {

int sleepTime = rnd.nextInt(3) + 1;

System.out.println(sleepMsg);

try {

Thread.sleep(sleepTime*1000);

} catch (InterruptedException e) {

break;

}

System.out.println(wakeUpMsg);

}

}

public static void main(String[] args) throws Exception {

String[] names = {"Inky", "Blinky", "Pinky", "Clyde"};

MultiThreadDemo[] t = new MultiThreadDemo[names.length];

for (int i = 0; i < names.length; ++i) {

t[i] = new MultiThreadDemo(names[i]);

}

for (int i = 0; i < t.length; ++i) {

t[i].start();

}

while (true) {}

}

}