Difference Betwixt Wait() In Addition To Bring Together Method Inwards Coffee Thread

Though both wait() together with join() methods are used to time out the electrical flow thread together with guide maintain a lot of similarities they guide maintain unlike purposes. One of the most obvious differences betwixt the wait() together with join() method is that sometime is declared inward java.lang.Object degree while join() is declared inward java.lang.Thread class. This agency that wait() is related to the monitor lock which is held yesteryear each instance of an object together with bring together method is related to Thread itself. The wait() method is used inward conjunction amongst notify() together with notifyAll() method for inter-thread communication, merely join() is used inward Java multi-threading to hold off until i thread finishes its execution.

 Another departure betwixt wait() and join() method is that sometime must live on called from synchronized method or block merely later on tin live on called without a synchronized block inward Java.

Influenza A virus subtype H5N1 expert noesis of differnet thread related methods e.g. start together with run, hold off together with notify, bring together together with yield goes a long way inward writing robuts together with right multi-threaded, concurrent Java applications. If you lot don't know how to usage bring together method, you lot fille out on writing programme where i thread needs to hold off for the completion of other thread earlier it starts.

These were to a greater extent than or less commutation departure betwixt wait() together with join() method, let's encounter a twain of to a greater extent than differences together with similarities inward detail.

Similarities betwixt wait() together with join()

Before looking at the departure betwixt wait() together with join() method of thread class, let's encounter to a greater extent than or less of the key similarities betwixt them:


1) Both wait() together with join() is used to time out the electrical flow thread inward Java. In the starting fourth dimension case, the thread which calls the wait() method goes into waiting for the solid set down spell inward the instant instance the thread which calls the join() method goes into waiting for the solid set down until the thread on which bring together has been called finishes its execution.  You tin farther see Complete Java Masterclass, i of the best Java course of report on Udemy to acquire to a greater extent than close how to usage bring together method inward Java.

2) Both wait() and join() are overloaded inward Java. You tin honour a version of both the wait() together with join() which accepts a timeout parameter.

3) Both wait() together with join() tin live on interrupted yesteryear calling interrupt() method inward Java. Which agency you lot tin handgrip the interrupt yesteryear catching InterrruptedException inward Java.

4) Both wait() together with join() are a non-static method together with cannot live on called from the static context.

Difference betwixt wait() together with join() method of thread

So far you lot guide maintain learned what is wait() together with join() method, why they are used together with to a greater extent than or less similarities betwixt them. Now is the fourth dimension to revise together with honour out to a greater extent than or less key differences betwixt them.

1) First together with firstly departure betwixt wait() together with join() method is that wait() is declared together with defined inward Object degree spell join() is defined inward the thread class. You tin farther encounter my answer to a related inquiry why hold off together with notify is declared inward Object class together with non inward Thread degree to acquire to a greater extent than close it.

2) Second of import departure betwixt wait() together with join() is that wait() must live on called from synchronized context i.e. synchronized method or block otherwise it volition throw IllegalMonitorStateException merely in that place is no such requirement for calling the join() method inward Java.

On the other hand, you lot tin telephone outcry upwards join() method amongst together with without synchronized context inward Java. The Java Concurrency inward Practice has explained this concept inward to a greater extent than detail, you lot tin refer to the wait, notify business office to acquire more.

wait() is used for inter-thread communication spell the join() is used for adding sequencing betwixt multiple threads e.g. i thread starts execution after starting fourth dimension thread finishes its execution.

5) You tin awake a thread waiting yesteryear calling wait() method of the object degree yesteryear using notify() together with notifyAll() method merely you lot tin non time out the waiting imposed yesteryear bring together without interruption or unless the thread on which bring together is called has finished execution.


That's all close the departure betwixt wait() together with join() method inward Java. Use wait() when you lot desire inter-thread communication e.g. to solve the producer-consumer occupation spell using the Thread.join()  method when you lot desire i thread to start execution alone if the starting fourth dimension thread finishes its execution.

Further Learning
Multithreading together with Parallel Computing inward Java
Applying Concurrency together with Multi-threading to Common Java Patterns
Java Concurrency inward Practice Course yesteryear Heinz Kabutz


Thanks for reading this article thence far. If you lot similar this interview inquiry together with my explanation together with thence delight portion amongst your friends together with colleageus. If you lot guide maintain whatsoever questions for feedback together with thence delight drib a comment. 

Share this post