java-me

How do I round a double to 5 decimal places, without using DecimalFormat ? You can round to the fifth decimal place by making it the first decimal place by multiplying your number. Then do normal rounding, and make it the fifth decimal place again. Let's say the value to round is a double named x : double factor = 1e5; // = 1 * 10^5 = 100000. double result = Math.round(x * factor) / factor; If you want to round to 6 decimal places, let factor be 1e6 , and so on. Whatever you do, if you end up with a double value it's unlikely to be exactly 5 decimal places. That just isn't the way binary

When I run my BlackBerry project in Eclipse, I get the following error: Error: Cannot run program "jar": CreateProcess error=2, The system cannot find the file specified How is this caused and how can I solve it? prinujith you can solve this problem by following setting Right Click My Computer -> Select Properties-> Select AdvancedSystem Settings Tab -> Environment variables Click on new button and Add Variable Name : JAVA_HOME Variable Value : C:\Program Files\Java\jdk1.7.0\ note jdk not jre Finally I get the solution .copy the jar.exe from java bin folder and paste to the jre bin folder. I

I'm developing a Java ME app & need pointers to some really good UI libraries. I did see a few such as Java ME Polish. Are there any more out there? For e.g. ebuddy's java ME app has an amazing UI and so is gmail's java ME app. What libraries would they have been using or would have they have developed it on their own? Sun recently released and opensourced their solution to crappy looking lcdui. It is called LIghtweight UI Toolkit and can be found on lwuit.dev.java.net We have been trying lately on kuix.. So far so good and more light weight than LWUIT code. http://code.google.com/p/kuix eSWT

What logging solutions exist for j2me? I'm specifically interested in easily excluding logging for "release" version, to have a smaller package & memory footprint. If you are using preprocessing and obfuscation with Proguard, then you can have a simple logging class. public class Log { public static void debug(final String message) { //#if !release.build System.out.println(message); //#endif } } Or do logging where ever you need to. Now, if release.build property is set to true, this code will be commented out, that will result in an empty method. Proguard will remove all usages of empty

I'm looking for an algorithm that rotates an image by some degrees (input). public Image rotateImage(Image image, int degrees) (Image instances could be replaced with int[] containing each pixel RGB values, My problem is that i need to implement it for a JavaME MIDP 2.0 project so i must use code runnable on JVM prior to version 1.5 Can anyone help me out with this ? EDIT: I forgot to mention that i don't have SVG APIs available and that i need a method to rotate by arbitrary degree other than 90 - 180- 270 Also, no java.awt.* packages are available on MIDP 2.0 earino One of the best pages