Heading Is there a way to map an arbitrary string to a HEX COLOR code. I tried to compute the HEX number for string using string hashcode. Now I need to convert this hex number to six digits which are in HEX color code range. Any suggestions ? Answer If you don’t really care about the “meaningR…
How to create own filetype?
I want to create own filetype to save objects in my app. Basically, I urgently do not need new filetype, but it will be better. I have class. For example Car. It has constructor (String name, String color, int length, Driver driver). When a car is created (its instance), how to save it like a file? Answer To …
Overload with different return type in Java?
Why is it not possible to overload a function just by changing the return type? Will that change in a future version of Java? By the way, just for reference, is this possible in C++? Answer You can’t do it in Java, and you can’t do it in C++. The rationale is that the return value alone is not suf…
How can I do LZW decoding in Java?
I have a database which contains picture data stored as a binary blob. The documentation says the data is encoded using LZW. I thought that I could decode it using the Zip or GZip input streams found in the Java library, but it didn’t work – I got an exception that said the format of the data is n…
How can I upload files to a server using JSP/Servlet?
How can I upload files to server using JSP/Servlet? I tried this: However, I only get the file name, not the file content. When I add enctype=”multipart/form-data” to the <form>, then request.getParameter() returns null. During research I stumbled upon Apache Common FileUpload. I tried this:…
IntelliJ IDEA with Junit 4.7 “!!! JUnit version 3.8 or later expected:”
When I attempt to run the following test in IntelliJ IDEA I get the message: “!!! JUnit version 3.8 or later expected:” It should be noted that this is an Android project I am working on in IntelliJ IDEA 9. The full stack trace looks like this… Answer This problem happens because Android Pla…
Java – ImageIcon won’t show image
I’m trying to load the icon but it won’t show up. The jpanel is within a boxlayout. I don’t know if that messes things up. It’s strange because I can add pretty much anything else except icon images. I went through the debugger and searchIcon is showing the width and height to be -1. D…
make a JLabel wrap it’s text by setting a max width
I have a JLabel which has a lot of text on it. Is there a way to make the JLabel have a max width so that it will wrap the text to make it not exceed this width? Thanks Answer No. You can use HTML in the label, but then you must hard code the break tag. A better approach
What is the Scanner class used for in Java? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 1 year ago. Improve this quest…
How to format decimals in a currency format?
Is there a way to format a decimal as following: If it is a round number, omit the decimal part. Otherwise format with two decimal places. Answer I doubt it. The problem is that 100 is never 100 if it’s a float, it’s normally 99.9999999999 or 100.0000001 or something like that. If you do want to f…