Java: Convert File to Char Array
Here is the code for converting a file to a char array. Actually, it should be reading file content to a char …
Unzip a .jar file in Java program
Here is a method that can unzip/unjar .jar file and extract files inside to a destination directory. There are mainly 2 steps: …
Java Method to Shuffle an Array
How to shuffle an array in Java? There are two approaches to shuffle an int array(randomizes the order of the elements in …
Java Code – Convert a file to a String
How to read file content into a string? The following is the Java code to do that. To make it work, the …
Java method for spliting a camelcase string
This Java method accepts a camel case string, and returns a linked list of splitted strings. It has been designed to handle …
Java Code: Given range, return an array of N random numbers
Here is a problem that accepts a range and a number, returns an array of n random numbers. n: size of random …
Sort content in a txt file
If you have a file with come words or terms on each line, you may want to sort it. Java Arrays.sort is …
Eclipse: java.lang.UnsupportedClassVersionError: Bad version number in .class file
While programming for a small project under Eclipse IDE, I got the following error message: java.lang.UnsupportedClassVersionError: Bad version number in .class file …
Java.lang.exception: can’t locate library at com.izforge.izpack.util.librarian.loadarchspecificlibrary
Java.lang.exception: can’t locate library at com.izforge.izpack.util.librarian.loadarchspecificlibrary This may not be all error messages you got. I only copied this part here for …
Schedule a java task to run at a certain time, and wrap it as a windows service
To make a Java program that runs at certain time is not difficult, we can just use java.util.Timer and java.util.TimerTask classes, here …
A simple example to show how to use java properties file
I am trying to make a simplified Database class for Database connection and query operation. It’s a good idea to put the …
A tool to increase blog visitor count
For some blogs, if you refresh the page, the count will increase such as blogs of sina, sohu, etc. I make the …
Convert java jar file to exe
Using eclipse or Netbeans, you can get executable jar files, but this jar file can be launched by using command line. But …
Java code: Open IE browser and close it
I want to refresh my blog on Sohu to increase the visitor count. The following is the code for open IE browser …
Please set java.home to a JDK installation
Please set java.home to a JDK install
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Using Java to read web page
The following is the code for reading html content of a web page. Using java to read web page is different from …
Java: convert a file to a byte array, then convert byte array to a file.
If you need Java code to convert a file to a byte array and then convert it back, this will work for …
Java: convert image to byte array, convert byte array to image
If you want to convert an image to a byte array, and then convert the byte array back to image, this is …
