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POThread wait sleep and notify
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  1. POThread wait sleep and notify
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    copied!<p>i'm creating a simple timer,i have some basic knowledge about thread. i can stop the currently sunning thread by wait but can't able to notify it shows"illegalmonitorstateexception".</p> <pre><code>'import java.awt.*; import java.awt.event.*; import java.applet.Applet; /* &lt;applet code = "TimerClass" width = 800 height = 600&gt;&lt;/applet&gt;*/ public class TimerClass extends Applet implements Runnable, ActionListener { Thread t1; int i; TextField sec; Button start; Button stop; boolean isStop; boolean isAlive; public void init() { sec = new TextField(10); start = new Button("Start"); stop = new Button("Stop"); add(sec); add(start); add(stop); start.addActionListener(this); stop.addActionListener(this); isStop = true; t1 = new Thread(this); } public void startThread() { t1.start(); isAlive = true; } public void awake() { try { System.out.println(Thread.currentThread().isAlive()); synchronized(t1) { Thread.currentThread().notify(); } } catch(Exception e) { System.out.println(e.toString()); } //Thread.interrupted(); } synchronized public void run() { do { try { Thread.sleep(1000); i += 1; sec.setText(Integer.toString(i)); System.out.println(i); if(isStop) { break; } } catch(InterruptedException ie) { continue; } }while(isStop != true); } public void stopThread() { try { synchronized(t1) { Thread.currentThread().wait(); } } catch(Exception ie) { } } public void paint(Graphics g) { } public void actionPerformed(ActionEvent ae) { if(ae.getActionCommand() == "Start") { if(!isAlive) { isStop = false; System.out.println("Thread start"); startThread(); } else { isStop = false; System.out.println("Thread start again" + isStop); awake(); } } if(ae.getActionCommand() == "Stop") { isStop = true; stopThread(); } } } </code></pre> <p>need help with this.</p>
 

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