public class SimpleThread extends Thread { public SimpleThread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System.out.println(i + " " + getName()); try { sleep((long)(Math.random() * 1000)); } catch (InterruptedException e) {} } System.out.println("DONE! " + getName()); } }
public class TwoThreadsTest { public static void main (String[] args) { new SimpleThread("Jamaica").start(); new SimpleThread("Fiji").start(); } }
0 Jamaica 0 Fiji 1 Fiji 1 Jamaica 2 Jamaica 2 Fiji 3 Fiji 3 Jamaica 4 Jamaica 4 Fiji 5 Jamaica 5 Fiji 6 Fiji 6 Jamaica 7 Jamaica 7 Fiji 8 Fiji 9 Fiji 8 Jamaica DONE! Fiji 9 Jamaica DONE! Jamaica
import java.awt.*; import java.util.*; import java.applet.*; import java.text.*; public class Clock extends java.applet.Applet implements Runnable { private volatile Thread clockThread = null; DateFormat formatter; // Formats the date displayed String lastdate; // String to hold date displayed Date currentDate; // Used to get date to display Color numberColor; // Color of numbers Font clockFaceFont; Locale locale; public void init() { setBackground(Color.white); numberColor = Color.red; locale = Locale.getDefault(); formatter = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.MEDIUM, locale); currentDate = new Date(); lastdate = formatter.format(currentDate); clockFaceFont = new Font("Sans-Serif", Font.PLAIN, 14); resize(275,25); } public void start() { if (clockThread == null) { clockThread = new Thread(this, "Clock"); clockThread.start(); } } public void run() { Thread myThread = Thread.currentThread(); while (clockThread == myThread) { repaint(); try { Thread.sleep(1000); } catch (InterruptedException e){ } } } public void paint(Graphics g) { String today; currentDate = new Date(); formatter = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.MEDIUM, locale); today = formatter.format(currentDate); g.setFont(clockFaceFont); // Erase and redraw g.setColor(getBackground()); g.drawString(lastdate, 0, 12); g.setColor(numberColor); g.drawString(today, 0, 12); lastdate = today; currentDate=null; } public void stop() { clockThread = null; } }