I make JSF project on GAP and it work well but when I put tag this problem appear HTTP ERROR 500 Problem accessing /welcome.jsf. Reason: DisableIdUniquenessCheck Caused by: Answer java.lang.NoSuchFieldError: DisableIdUniquenessCheck at com.sun.faces.util.Util.checkIdUniqueness(Util.java:812) This field was in…
Android Thread Allocation – growing heap?
Hi everyone out there, i am developing an android application against API 7 at the moment in which i use an activity which need to be restarted. Lets say my activity looks like this: The problem is that the gc doesnt seem to free the fullAnim thread so that the heap is growing by ~100K at every restart –…
Rounding Up To The Nearest Hundred
I came to a part in my java program where I need to round up to the nearest hundred and thought that there was probably some way to do it but I guess not. So I searched the net for examples or any answers and I’ve yet to find any since all examples appear to be to the nearest hundred.
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
I see java.util.function.BiFunction, so I can do this: What if that is not good enough and I need TriFunction? It doesn’t exist! I guess I should add that I know I can define my own TriFunction, I’m just trying to understand the rationale behind not including it in the standard library. Answer As …
How to print the address of an object if you have redefined toString method
I’m a newbie to Java. Now I’m studying equals and == and redefinition of equals and toString. I would like to use both the toString method that I have redefied and the default method that is inherited from the Object class. I failed to use that super modificator to reach that method. This is for e…
Java Questions Regarding declaring a list of Comparable objects
It is a pretty simple one. I want to declare a list of objects, but I want make sure all objects implemented the Comparable interface. What should I do? I try to write But compiler gives me a warning. What is the proper way to write it? Thanks Follow up: I thought I had finished the question before I post
How do I convert unicode codepoints to their character representation?
How do I convert strings representing code points to the appropriate character? For example, I want to have a function which gets U+00E4 and returns ä. I know that in the character class I have a …
IllegalArgumentException: Numbers of source Raster bands and source color space components do not match For a color image Exception
The above answer that someone has suggest, converts my colored image to a black and white one. So it’s not appropriate for my question. here is the code and below is the image. Download the image and save in your pc. And try to run the above code with a correct value of path, it will throw an exception …
How can I import javax.json in eclipse
I have installed eclipse ide for EE developers and I am receiving an import error for I have right clicked on project folder -> clicked properties -> clicked Java build path -> add library -> JRE System Library, but the dependencies that show up are already imported. How can I import the javax.jso…
Formatting a string array in java
I have a string array which has k elements. I want to print them out using System.out.format, but the issue is that I do not know k. So essentially, I want to use something like: System.out.format(“%s %s … k times”, str1, str2, … strk); (where k is a variable) I was looking through the…