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import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MainClass {
public static void main(String[] args) {
PrintTask task1 = new PrintTask("thread1");
PrintTask task2 = new PrintTask("thread2");
PrintTask task3 = new PrintTask("thread3");
System.out.println("Starting threads");
ExecutorService threadExecutor = Executors.newCachedThreadPool();
// start threads and place in runnable state
threadExecutor.execute(task1); // start task1
threadExecutor.execute(task2); // start task2
threadExecutor.execute(task3); // start task3
threadExecutor.shutdown(); // shutdown worker threads
System.out.println("Threads started, main ends\n");
}
}
class PrintTask implements Runnable {
private int sleepTime;
private String threadName;
public PrintTask(String name) {
threadName = name;
sleepTime = 1000;
}
public void run() {
try {
System.out.printf("%s going to sleep for %d milliseconds.\n", threadName, sleepTime);
Thread.sleep(sleepTime); // put thread to sleep
} catch (InterruptedException exception) {
exception.printStackTrace();
}
System.out.printf("%s done sleeping\n", threadName);
}
}
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