What Is Daemon Thread Inwards Coffee Together With Divergence To Not Daemon Thread - Tutorial Example
Daemon thread inwards Java are those thread which runs inwards background in addition to to a greater extent than oftentimes than non created yesteryear JVM for performing background project similar Garbage collection in addition to other solid keeping tasks. Difference betwixt Daemon in addition to Non Daemon(User Threads) is equally good an interesting multi-threading interview question, which asked to a greater extent than oftentimes than non on fresher score coffee interviews. In i describe principal divergence betwixt daemon thread in addition to user thread is that equally shortly equally all user thread complete execution coffee programme or JVM terminates itself, JVM doesn't await for daemon thread to complete at that spot execution. As shortly equally last non daemon thread finished JVM terminates no affair how many Daemon thread exists or running within JVM. In this coffee thread tutorial nosotros volition encounter example of Daemon thread inwards Java in addition to roughly to a greater extent than differences betwixt Daemon in addition to non daemon threads.
Important points near Daemon threads inwards Java
1. Any thread created yesteryear principal thread, which runs main method inwards Java is yesteryear default non daemon because Thread inherits its daemon nature from the Thread which creates it i.e. raise Thread in addition to since principal thread is a non daemon thread, whatever other thread created from it volition stay non-daemon until explicitly made daemon yesteryear calling setDaemon(true).
2. Thread.setDaemon(true) makes a Thread daemon but it tin flame solely live called earlier starting Thread inwards Java. It volition throw IllegalThreadStateException if corresponding Thread is already started in addition to running.
3. Daemon Threads are suitable for doing background jobs similar housekeeping, Though I accept even in addition to hence to utilization it for whatever practical role inwards application code. allow us know if you lot accept used daemon thread inwards your coffee application for whatever practical purpose.
Difference betwixt Daemon in addition to Non Daemon thread inwards Java
here are twain of differences betwixt daemon in addition to user thread inwards Java:
1) JVM doesn't wait for whatever daemon thread to complete earlier existing.
2) Daemon Thread are treated differently than User Thread when JVM terminates, finally blocks are non called, Stacks are non unwounded in addition to JVM simply exits.
Daemon Thread Example inwards Java
Here is a code instance of daemon thread inwards java. nosotros brand a user thread daemon yesteryear calling setDaemon(true) in addition to every fourth dimension you lot run you lot volition encounter variable release of impress tilt related to "daemon thread is running" you lot volition never encounter impress tilt written inwards finally block because finally volition non live called. public class DaemonThreadExample {
public static void main(String args[]){
Thread daemonThread = new Thread(new Runnable(){
@Override
public void run(){
try{
while(true){
System.out.println("Daemon thread is running");
}
}catch(Exception e){
}finally{
System.out.println("Daemon Thread exiting"); //never called
}
}
}, "Daemon-Thread");
daemonThread.setDaemon(true); //making this thread daemon
daemonThread.start();
}
public static void main(String args[]){
Thread daemonThread = new Thread(new Runnable(){
@Override
public void run(){
try{
while(true){
System.out.println("Daemon thread is running");
}
}catch(Exception e){
}finally{
System.out.println("Daemon Thread exiting"); //never called
}
}
}, "Daemon-Thread");
daemonThread.setDaemon(true); //making this thread daemon
daemonThread.start();
}
Output:
Daemon thread is running
Daemon thread is running
Daemon thread is running
Daemon thread is running
Daemon thread is running
Daemon thread is running
Daemon thread is running
Daemon thread is running
That’s all on What is Daemon Thread inwards Java in addition to difference betwixt Daemon in addition to non daemon thread inwards Java amongst code instance of Daemon thread inwards Java. JVM equally good uses daemon thread for Garbage collection.
Further Learning
Multithreading in addition to Parallel Computing inwards Java
Java Concurrency inwards Practice - The Book
How to Solve Producer Consumer Problem inwards Java
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