Win a copy of Machine Learning Systems: Designs that scale this week in the Scala forum
or Xamarin in Action: Creating native cross-platform mobile apps in the Android forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic

Printing sequence - Threads  RSS feed

 
Ranch Hand
Posts: 76
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
In the following code,

the output got is 'In doIt method' followed by ' Thread is running.'

I was expecting the output in reverse- ' Thread is running.' followed by ' In doIt method'. Could someone please clarify this behavior?
 
author and iconoclast
Sheriff
Posts: 24219
40
Chrome Eclipse IDE Mac OS X
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The Thread.start() method returns pretty much immediately, but it takes some time for a thread to get going. The thread that called start() (i.e., your main thread) keeps running while the newly-created thread gets ready to go. By the time that new thread starts actually running Java code, the original thread will have executed many instructions.

So the main thread here calls start(), then immediately calls doIt(), which prints a message. All the while, the new thread is being initialized. Finally, some time after doit() is called, the new thread starts to execute your code.
 
He loves you so much! And I'm baking the cake! I'm going to put this tiny ad in the cake:
Rocket Oven Kickstarter - from the trailboss
https://coderanch.com/t/695773/Rocket-Oven-Kickstarter-trailboss
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!