formatting and converting in java

Posted by mike_hornbeck on Stack Overflow See other posts from Stack Overflow or by mike_hornbeck
Published on 2010-03-27T16:51:16Z Indexed on 2010/03/27 16:53 UTC
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Filed under:

java

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formatting

|

casting

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convert

I have few small basic problems :

How to format :

int i = 456;

to give output :

""00000456"

? I've tried %08d but it's not working. Next thing is a problem with conversion and then formatting. I have side and height of triangle, let's say int's 4,7, and 7 is the height. From formula for field we know that F=1/2(a*h). So how to get F as float, with precision up to 10 places ?

float f = a*h;

works fine, but multiplying it by 0.5 gives error and by 1/2 returns 0.

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