Getting Started with Java threads--defining the Run method in a thread

The Run method is the code that needs to be executed when the thread is run. (You want to use code-that is, the run () method-to describe a process, rather than creating an object that represents the process. There has been a controversy over how to understand threads. It depends on whether you treat the thread as an object or as a process. If you think it is a process, you are free from the oo dogma of everything. But at the same time, if you just want the process to take over a part of the program, you have no reason to make the whole class Runnable. For this reason, it is often a wiser choice to hide the thread code in the form of an inner class. From TIJ3. ）





in the Java language, we can implement our run method in the following two ways:





1, overrides the Java.lang.Thread public void Run () method.








public class Simplethread extends Thread {





public Simplethread (String str) {





super (str);





}





public void Run () {





for (int i = 0; i < i++) {





System.out.println (i + "" + getName ());





try {





Sleep ((Long) (Math.random () * 1000));





} catch (Interruptedexception e) {





}





}





System.out.println ("done!" + getName ());





}





}





call the thread defined above:








public class Twothreadsdemo {





public static void Main (string[] args) {





New Simplethread ("Jamaica"). Start ();





New Simplethread ("Fiji"). Start ();





}





}











2, implement Java.lang.Runnable interface:








import Java.awt.Graphics;





import java.util.*;





import Java.text.DateFormat;





import Java.applet.Applet;











public class Clock extends Applet implements Runnable {





private Thread clockthread = null;





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) {





Calendar cal = Calendar.getinstance ();





date = Cal.gettime ();





DateFormat dateformatter = Dateformat.gettimeinstance ();





g.drawstring (Dateformatter.format (date), 5, 10);





}





public void Stop () {





Clockthread = null;





}





}