How to check if a checkbox is checked using jQuery / javascript
Many times we need to show or hide an element based on the current state of a checkbox and for that we should first check whether the checkbox is checked…
How to remove an item from array in javascript
An array is a collection of values enclosed between square brackets in javascript. It is possible to create an array with pre-defined values and also add values to the array…
Ternary operator in java with example
What is ternary operator Literal meaning of ternary is three. As the name suggests, a ternary operator is an operator which has three operands. First of these three operands is…
How to download a file from URL in java
Often it is required to download a file directly from a URL to a local system such as downloading a file from a remote repository. This requires reading a file…
How to get java version programatically
Why java version at runtime Sometimes you need to execute some code conditionally based on the current executing java version. For example, there is some functionality whose code was different…
How to find size of directory in linux / du command tutorial in linux
Determining the size of a directory or its sub-directories is often required for the purpose of monitoring such as a folder which is taking space above some limit. du command…
How to change default ports in wildfly
Every server runs at some pre-defined default ports. But you can also change the default setting so that the server listens at the configured port number. Default ports of Wildfly…
java.lang.UnsupportedClassVersionerror and its solution
Almost every java developer would have encountered the below error sometime or the other while executing a java program. Exception in thread "main" java.lang.UnsupportedClassVersionError: com/codippa/HelloWorld has been compiled by a…
How to find out the jdk version which compiled a class in java
You can easily determine the jdk version with which a given java file was compiled using the below command. javap --verbose <class file name> The above command should be executed…