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Easy Learn Java: Programming Articles, Examples and Tips - Page 108


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The beta release of J2SE 1.5 is scheduled for late 2003. I have heard that there

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Question: The beta release of J2SE 1.5 is scheduled for late 2003. I have heard that there will be some changes in a code writing process that will make our life easier...

Answer: Yes, indeed. The improvements to J2SE being developed in project "Tiger" are intended to make programs clearer, shorter, safer, and easier to develop, without sacrificing compatibility. Java 1.5 will shift the responsibility for writing the boilerplate code from the programmer to the compiler...
Example:

Instead of writing
String title = ((String) words.get(i)).toUppercase();

you will do like this:

String title = words.get(i).toUppercase();
and it will decrease the number of compile errors. Compiler will try to cast to String without saying it explicitly.

More about all coming changes you can read in this excellent article:
"New Language Features for Ease of Development in the Java 2 Platform, Standard Edition 1.5: A Conversation with Joshua Bloch" on:
http://java.sun.com/features/2003/05/bloch_qa.html

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9 comments | Printer Friendly Page  Send to a Friend | Score: 4
Posted by jalex on Tuesday, November 11, 2003 (00:00:00) (3079 reads)

I want to use progress bar for downloading files from Internet. But how do I kn

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Question: I want to use progress bar for downloading files from Internet. But how do I know in advance the file size and then show the progress of downloading?

Answer: First, try to get file size by:

int filesize = yourURL.openConnection().getContentLength();
if it returns -1 then you really do not know the file size.

Second step in this case will be to use progress bar in indeterminate mode - Mozilla like. This is available since Java 1.4. In this mode, the progress bar displays animation to indicate that work is occurring. As soon as the program determines the length of the task, you should switch the progress bar back into its default, determinate mode.
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1 comment | Printer Friendly Page  Send to a Friend | Score: 3.5
Posted by jalex on Monday, November 10, 2003 (00:00:00) (5258 reads)

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