Daemon Threads
In Java, any thread can be a Daemon thread. Daemon threads are
like a service providers for other threads or objects running in the same process as the daemon thread. Daemon threads are used for background supporting tasks and are only needed while normal threads are executing. If normal threads are not running and remaining threads are daemon threads then the interpreter exits.
setDaemon(true/false) – This method is used to specify that a thread is daemon thread.
public boolean isDaemon() – This method is used to determine the thread is daemon thread or not.
The following program demonstrates the Daemon Thread:
public class DaemonThread extends Thread {
public void run() {
System.out.println("Entering run method");
try {
System.out.println("In run Method: currentThread() is"
+ Thread.currentThread());
while (true) {
try {
Thread.sleep(500);
} catch (InterruptedException x) {
}
System.out.println("In run method: woke up again");
}
} finally {
System.out.println("Leaving run Method");
}
}
public static void main(String[] args) {
System.out.println("Entering main Method");
DaemonThread t = new DaemonThread();
t.setDaemon(true);
t.start();
try {
Thread.sleep(3000);
} catch (InterruptedException x) {
}
System.out.println("Leaving main method");
}
}
|
Output of this program is:
C:\j2se6\thread>javac DaemonThread.java
C:\j2se6\thread>java DaemonThread
Entering main Method
Entering run method
In run Method: currentThread() isThread[Thread-0,5,main]
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
In run method: woke up again
Leaving main method
C:\j2se6\thread> |
Download this example
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Current Comments
3 comments so far (post your own) View All Comments Latest 10 Comments:Please run the EJB on Ecllipse IDE.bcz i have problem in it.
Posted by Shani Kumar Gupta on Wednesday, 06.4.08 @ 16:04pm | #62078
please show best example for Expression Language program and jsp usebean programin jsp concepts
Posted by kamala on Tuesday, 04.1.08 @ 17:30pm | #55042
hi.. i want free online books for core java ( pdf or doc) format,where can i have these books ?
thanks in Regards
Karthik
Posted by karthikeyan on Monday, 03.24.08 @ 16:14pm | #54146