Question 1: my question is that y child thread is running everytime 2 times than of main thread.could u please clearify it more. i will be really thankfull to u. kumar abhay [ edited to add 'code' tags (for readability) - George ] [ July 17, 2002: Message edited by: George Brown ]
This is becuase of sleep interval. In your code the main thread is sleeping for 1000ms and child thread is sleeping for 500ms.Increase the sleep interval of child process to 1000ms and you will get different output.Something like this: Child Thread:Thread[Demo Thread,5,main] Main Thread:5 Child thread:5 Main Thread:4 Child thread:4 Main Thread:3 Child thread:3 Main Thread:2 Child thread:2 Main Thread:1 Child thread:1 Main Thread Exiting Exiting Child Thread [ June 28, 2002: Message edited by: Snigdha Solanki ]
Snigdha<br />Sun Certified Programmer for the Java™ 2 Platform
It is not necessary to both implement Runnable AND encapsulate another thread. I altered yoru program below to show how you should/could have done it.
This is typically how Runnable is used. Also, threads will NOT run in a guaranteed order. The OS will decide when to switch off a thread and when to switch on one. Just because you put in certain timing does not mean that is what you will see on the output. Not to menation that both threads could try to access System.out at the same time and you could get some overwritten output kind of blended between the two. The OS is not a realtime OS and as such done expect fair time sharing, though the OS will attempt to be fair, its not guaranteed.