Question

designing custom components

Asked by: jkid

Hi,

I am newbie to Java and looking for a job change.I like to answers to know the common questions that I am encountered in recent interviews.
1. How to design custom components ?
2. Where can learn more about core java design patterns.  
   Let me know any websites that allows me download.

And in my recent interview i was asked to write a program  for a producer/consumer scenario based on threads. Producer thread should start producing objects and push it into a queue. And consumer thread consume them as FIFO. When no objects in queue sleep for some time and check later if there any in queue. And producer should go to sleep,if the quantity in queue reaches 100. And check after sleep if the quantiy is less than 100.

Any help in thi regard highly appreciated.

java-whizkid.

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Asked On
2003-01-06 at 01:53:44ID20445456
Tags

consumer

,

design

Topic

Java Programming Language

Participating Experts
4
Points
100
Comments
7

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Answers

 

by: heyhey_Posted on 2003-01-06 at 02:57:42ID: 7675883

regarding your second question - google is your friend

http://www.google.com/search?q=Java+producer+consumer+example&num=0&ie=utf-8&oe=utf-8

http://java.sun.com/docs/books/tutorial/essential/threads/synchronization.html

regarding your first question - there isn't magic book - start reading the Java tutorial and code various small application yourself.

 

by: conickPosted on 2003-01-06 at 08:33:26ID: 7677591

1) What kind of components? GUI components? If GUI find a component that meets the majority of your needs and change it. If you need a completely new component override JComponent. This question is virtually impossible without further details.
2) "Design Patterns" by GoF is usually given as THE pattern book. Ive heard "Applied Java Patterns" is a good knockoff that uses Java examples (instead of SmallTalk/C++). You can download Bruce Eckel's "Thinking in Patterns". Its unfinished but freely available. (I dont know how finished it is):
http://64.78.49.204/

3) See heyhey_'s links.

 

by: jkidPosted on 2003-01-07 at 10:10:45ID: 7681110

Hi,
thanks for the answers. I got the answer for the produer/consumer problem. I have still no clue about designing custom components. For instance, if want to design new component that is not available in AWT/Swing, may be some thing like button looks limke a two way electrical switch, appears differently with ON/OFF. Its just an hypothetical example only. Here my question is what steps/care should i need to take care when extending a Jcomponent.

java-whizkid

 

by: conickPosted on 2003-01-07 at 18:21:43ID: 7682867

So you are talking about graphical components.

You still to base your component off of a GUI component and then do custom painting. JComponent or JPanel (for Swing) or Canvas (for AWT) are normally used.

You then override the painting method(s) of the component and work with the Graphics object provided.

Check out the Java Tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/painting/index.html

 

by: CleanupPingPosted on 2003-08-03 at 05:31:14ID: 9060175

jkid:
This old question needs to be finalized -- accept an answer, split points, or get a refund.  For information on your options, please click here-> http:/help/closing.jsp#1
EXPERTS:
Post your closing recommendations!  No comment means you don't care.

 

by: TimYatesPosted on 2003-11-18 at 05:32:15ID: 9770732

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is:

Split between heyhey_ and conick.

Please leave any comments here within the next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

TimYates
EE Cleanup Volunteer

20120131-EE-VQP-002

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