point.comJava Daemon Thread
Daemon thread runs as a low priority thread in the background to perform certain tasks such as garbage collection, finalizer, etc.
- A daemon thread will execute only as long as the rest of the program continues to execute.
- When all user threads finish execution after JVM terminates itself.
- In Java, many daemon threads are running automatically e.g. gc, finalizer etc.
- It is a very low priority thread.
- The daemon thread life depends on user threads.
Syntax:
public void setDaemon(boolean status) public boolean isDaemon()
Methods for Java Daemon thread
There are two methods in daemon thread.
| S.No | Method | Description |
|---|---|---|
| 1 | public void setDaemon(boolean status) | It is used to mark the current thread as daemon thread or user thread. |
| 2 | public boolean isDaemon() | It is used to check that current is daemon. |
Example:
public class DaemonThread extends Thread {
public void run() {
if(Thread.currentThread().isDaemon()){
System.out.println("Daemon Thread");
}
else{
System.out.println("Normal Thread");
}
}
public static void main(String[] args) throws Exception {
DaemonThread t = new DaemonThread();
System.out.println("Current thread is " + t.currentThread());
t.setDaemon(true);
t.start();
}
}
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