How to Install Java on Windows (Step-by-Step Guide)
Learn how to install Java 21 (Oracle and Temurin) on Windows with screenshots and easy-to-follow instructions.
How to attach JDK source code to IntelliJ IDEA?
In this article, we will show you how to attach the JDK source code into the IntelliJ IDEA? By default, IntelliJ IDEA doesn’t come with JDK source code, and the auto decompile feature is useful; however, we still need to jump in the source code to read the source code comments or docs to understand […]
How to change the IntelliJ IDEA JDK version?
This article shows you how to update the IntelliJ IDEA to use the new JDK 13. 1. On the menu, clicks File -> Project Structure 2. Platform Settings -> SDKs, add and point to the JDK 13 installed folder. 3. Project Settings -> Project, change both Project SDK and Project language level to JDK 13. […]
How to Set JAVA_HOME on Windows (Step-by-Step Guide)
Learn how to set the JAVA_HOME environment variable on Windows 10 or 11 with easy-to-follow steps and screenshots.
Where to download Java JDK source code ?
The JDK source code is inside the src.zip, this article shows you how to get it on Windows, Ubuntu (Linux) and Mac OSX. 1. Windows In Windows, visit the Oracle website and download the JDK (not JRE). Install the JDK and the src.zip is inside the JDK installed folder, for example : C:\Program Files\Java\jdk1.7.0_40\src.zip 2. […]
Download JDK Source code for Mac OS X
The JDK source code is packaged in a src.jar, and should be in the JDK/Home folder. However, some JDK versions in Mac OSX didn’t include the source code or Javadoc. Try find it : sudo find / -name src.jar If you couldn’t find the src.jar, then get it from Apple developer website. 1. Download from […]
Your project must be configured to use a JDK in order to use JSPs
Problem Using Eclipse 3.7 + Google Plugin for Eclipse to develop GAE project, when created a .jsp file in “war” directory, Eclipse shows a cross error icon on top of the JSP file. In Eclipse problem view, it show “Your project must be configured to use a JDK in order to use JSPs.“. Solution To […]
Maven : generics are not supported in -source 1.3
Problem Maven as project build tool. Using Java generic function, when build with Maven, get this error message generics are not supported in -source 1.3 (use -source 5 or higher to enable generics) Solution You need to tell Maven to use JDK 1.5 to compile your source code explicitly. Declare Maven compiler plugin (maven-compiler-plugin) in […]
How to compile Maven project with different JDK version?
By default, Maven 2 uses JDK 1.4, Maven 3 uses JDK 1.5 to compile the project, which is very old. Fortunately, Maven comes with a Compiler Plugin, which tell Maven to compile the project source with a particular JDK version. Solution Configure the plugin compiler directly. (Tested with Maven 2 and 3) pom.xml <project> <build> […]
How to install Java JDK on Ubuntu
This tutorial shows you how to install OpenJDK 8, 11, 16, and other JDK builds on Ubuntu 20. 1. APT Install JDK (OpenJDK 8 and 11) 2. Install JDK manually (OpenJDK 16) 3. Install Oracle JDK on Ubuntu 4. Switch between different JDK versions 5. Add JAVA_HOME to Ubuntu environment variable 6. References 1. APT […]
How to install java jdk on fedora core (linux)
How to install java jdk on fedora core? here i provide few steps to demonstrate how it’s work. Installation Setup 1 ) Please visit sun java website to download any java jdk version you like. http://java.sun.com/javase/downloads/index.jsp 2 ) Click download, select Linux platform, language and accept license and continue. 3 ) Select “Linux RPM in […]