From the main menu, select Help | Find Action or press Ctrl Shift 0A . Find and select the Choose Boot Java Runtime for the IDE action. Select the new desired runtime and click OK.
Java SE 11 OR 17 remains the preferred production standard in 2022. While both 9 and 10 have been released, neither will be offering LTS. Since it's first release in 1996, Java has maintained a reputation for being one of the most secure, reliable, and platform independent languages for computer programming.
The JAVA_HOME environment variable is set to the JDK installation directory. The variable can then be used by any program that needs access to the JDK. You can think of JAVA_HOME as a pointer. Any time you start a program that relies on the JDK in some way, the program uses that pointer to find it.
I'd recommend setting it as a system variable. JAVA_HOME is used by Gradle and Maven build tools (and some other things) to know where the root directory of your JDK is located. It should point to the folder where the bin folder is located, ie C:\Program Files\Java\jdk-11.0.
To conclude, the JAVA_HOME environment variable is used by programs mostly targeted as development tools. On the other hand, user-facing applications need the PATH environment variable to know the location of the JVM.
The default installation directory of a static JRE is C:\Program Files (x86)\Java\jre n (for 32-bit versions) or C:\Program Files\Java\jre n (for 64-bit versions), where n is the full Java SE release and update number (for example, n = 1.8. 0_20 for release 8 update 20).
The default installation directory of a static JRE is of the form c:/Program Files/Java/jre<version>. For example, by default, a static JRE for Java SE 6u10 will be installed in the directory c:/Program Files/Java/jre1.
You can use internal extensions to modify the runtime process. Internal extensions are not separate processes—they run as part of the runtime process. Lambda provides language-specific environment variables that you can set to add options and tools to the runtime.
JDK is for development purpose whereas JRE is for running the java programs. JDK and JRE both contains JVM so that we can run our java program. JVM is the heart of java programming language and provides platform independence.
JDK(Java Development Kit) is used to develop Java applications. JDK also contains numerous development tools like compilers, debuggers, etc. JRE(Java Runtime Environment) is the implementation of JVM(Java Virtual Machine) and it is specially designed to execute Java programs.
The Java Runtime Environment (JRE) is software that Java programs require to run correctly. Java is a computer language that powers many current web and mobile applications. The JRE is the underlying technology that communicates between the Java program and the operating system.
If you want to run Java programs, but not develop them, download the Java Runtime Environment, or JRE. If you want to develop applications for Java, download the Java Development Kit, or JDK. The JDK includes the JRE, so you do not have to download both separately.
Java isn't preinstalled in any Windows version (OEM not included - depends on the manufacturer then).
By default, the path to the Java directory is Java 1.6 installation directory \Java1. 6\bin. To configure the Java path: Open My Computer and click Properties to open the System Properties window, or click Start > Control Panel > System.
Generally, it does not matter if you point it at JRE or JDK. It depends on the application which uses it. Ant documentation says you should point it at JDK to get all Ant's features. as a developer, you should point your JAVA_HOME at jdk to access javac copiler etc.
Open a Command Prompt window (Win⊞ + R, type cmd, hit Enter). Enter the command echo %JAVA_HOME% . This should output the path to your Java installation folder. If it doesn't, your JAVA_HOME variable was not set correctly.
The JAVA_HOME directory is /usr/local/j2sdk1. 4.2_03 . If the which java command returns a symbolic link, use the ls -ld <symbolic_link> command to determine the real Java directory name. Note the Java version that is returned.