Java Answers Forum - Understanding of Threads in Java

Articles |
News |
Weblogs |
Books |
Forums

Artima Forums | Articles | Weblogs | Java Answers | News

Sponsored Link •

Java Answers Forum
Understanding of Threads in Java

1 reply on 1 page. Most recent reply: Mar 10, 2003 2:31 AM by Alex S

Welcome Guest
Sign In

Back to Topic List

Reply to this Topic

Search Forum

Threaded View


Previous Topic		Next Topic

Flat View: This topic has 1 reply on 1 page

Keith Cavanaugh

Posts: 1
Nickname: vanuatu
Registered: Feb, 2003

Understanding of Threads in Java

Posted: Feb 18, 2003 2:07 PM

If I created a subclass called testThread, put a counter in it that increments every 100 milliseconds,
and add a public method to retrieve the counter value, would the following be correct?

class clockThread extends Thread {

int counter = 0;

public clockThread(int number) {

while(true) {

counter = number;
try {
Thread.sleep(100);
}
catch ( InterruptedException e) {}
counter ++

}
}
}

How would I create an applet that has two instances of testThread and uses the paint method to
display the counters in two threads? How would I adjust the priorities of the two threads?

Your help in understanding this will be appreciated.

Alex S

Posts: 27
Nickname: andu
Registered: Mar, 2003

Re: Understanding of Threads in Java

Posted: Mar 10, 2003 2:31 AM

Every thread starts when you call start() method. This method will call run() method.

So, you have to override the Thread's run() method, put there your thread functionality and then call start() method to start the thread. By the way, if you put code like "while(true)..." in your constructor, I guess your object will never be created.

Pay attention to syncronization if you will share resources (variables, objects etc) between two or more threads.

If you want to learn java threads, read Thread and Runnable java api documentation and thread tutorial from java tutorial (check on http://java.sun.com site).

Flat View: This topic has 1 reply on 1 page

Previous Topic

Next Topic


	Web Artima.com