How To Set Java, JRE and JDK Home Path and Environment Variables On Windows?

Java is a very popular programming language which provides a different component in order to run, develop Java applications. JRE or Java Runtime Environment is used to run Java application. JDK or Java Development Kit is used to develop Java applications. In this tutorial, we will learn how to set up Java, JRE, and JDK operating system path variables in order to work properly.

Locate JRE or JDK Path

Before starting the configuration we have to locate the JRE or JDK path. JRE or JDK generally installed on the Program Files or Program Files(x86) directory under the Java directory like below.

Locate JRE or JDK Path

and under the Java directory the JDK is residing.

Locate JRE or JDK Path

Set Java HOME_PATH Environment Variable

Now we have learned the path of the Java, JRE or JDK installation. We can set this path as Java HOME_PATH environment variable. We will open the computer properties with by running sysdm.cpl in the Run menu like below. We can also open it from the File Explorer -> Computer -> Right Click.

Open System Properties

In the system properties, we will navigate to the Advanced tab which provides the Environment Variables button like below.

Open Environment Variables

Below we can see the environment variables menu where we will create the JAVA_HOME system variable and set the path accordingly. We click to the New in order to create a new system variable.

Create New System Variable

Here we will set the Variable Name as JAVA_HOME and the Variable Value the path or Java, JRE or JDK which is C:\Program Files\Java\jdk-12 in this example. Then we will click OK.

Set JAVA Executable Path

If we want to run java.exe or similar executables provided by JRE or JDK we have to add the path of Java in the Path variable like below. We select the system variable named Path and click to the Edit .

Here we click to New which will add a new line to the existing values.

Here we will set the bin folder path which is C:\Program Files\Java\jdk-12\bin in this example.

Add Path System Variable

Then we will click OK and OK in the environment variables screen which will save and activated new path configuration.

Check Java Is Working

We can check the new path configuration simply opening a new command line interface MS-DOS. Then just type java -version which will execute java.exe with the -version option. We can see the current java binary version by running it.

3 thoughts on “How To Set Java, JRE and JDK Home Path and Environment Variables On Windows?”

What is the point in setting the JAVA_HOME to the path to the jdk install folder path if you then edit the Path variable and add the full path to the jdk bin folder? Shouldn’t you make use of the JAVA_HOME variable and add %JAVA_HOME%\bin to the Path instead.

@James Coffey, maybe the point of setting JAVA_HOME is just in preparation for GlassFish:
https://docs.oracle.com/cd/E19182-01/820-7851/inst_cli_jdk_javahome_t/index.html
Still, the author could make use of it in Path as you say, but maybe the author is just trying to keep it simple.

THANK YOU SO MUCH. YOU SAVED MY LIFE. I need to use java in jupyter

Window add Java to Path

I used to use My Computer -> Environment variables to set up PATH for Java, but where can I find the same in Windows 8?

2 Answers 2

Type: Control Panel

In the control panel search box, enter:

Edit environment variables for your account

Edit the system environment variables

The environment variable dialog itself is very similar to the one under previous versions of Windows.

Set Environment variable using Command Prompt in easy two steps:

Example of windows SET command:

Step 1. Print the PATH environment variable

Step 2. Add one variable to path ( For example : Java SDK )

Verify the Change

Not the answer you’re looking for? Browse other questions tagged java windows path or ask your own question.

Linked

Related

Hot Network Questions

Subscribe to RSS

To subscribe to this RSS feed, copy and paste this URL into your RSS reader.

site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. rev 2021.4.16.39093

By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.

What is the path of the JVM inside the JRE?

I am just learning Java and I wanted to know that everywhere its written that JVM present inside JRE. I just wanted to know the complete path where exactly JVM is present inside JRE.

4 Answers 4

In Windows : inside your JRE, you will have a folder like this : C:\Program Files (x86)\Java\jre7\bin\client —> this directory contains the client JVM jvm.dll .

Under :linux you will find it in /jreInstallation/lib/yourSystemArchtecture(amd64 in my case)/(server/client)/libjvm.so

A VM is nothing but a shared library like dll or so file. Your java exe or other executable file calls the jvm.

Note : You can call your JVM using any language / executable file/ You could write a shell script or a cobol program to execute the JVM

If you intend to use the Invocation API in a native application and access Java APIs installed as part of OpenJDK (Java 10, Java 11, etc.) in $ directory, link against (or dynamically load) jvm.dll found in $/bin/server/jvm.dll .

Oracle installers (currently up to Java 8) add a Windows Registry key pointing to jvm.dll . For example, when JRE 8 is installed, the following key is added:

HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.8

and it contains a string value RuntimeLib set to absolute path to jvm.dll . Also, information that 1.8 is the CurrentVersion can be found in key:

HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment

As of Java 9, Oracle abbreviated Java Runtime Environment to JRE , so the keys are: HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\JRE HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\JRE\9

How to set the java path and classpath in windows-64bit

I have installed java on windows-64bit OS. but when I execute javac, it is failing with the

error message no such command is available». I have created following environmental variable

CLASSPATH C:\Program Files (x86)\Java\jdk1.6.0_05\lib

5 Answers 5

Add the appropriate javac path to your PATH variable. java.exe will be found under the bin directory of your JDK. E.g.

Before answering your question, just wann ans this simple question : Why we need PATH and CLASSPATH?

Answer:

1) PATH: You need to set PATH to compile Java source code, create JAVA CLASS FILES and Operating System to load classes at runtime.

2) CLASSPATH: This is used by JVM and not by OS.

Answer to your question :

Just make sure you have Modified PATH variable (Windows System Environmental Variable) so that it points to bin dir which contains all exe for example: java,javac and etc. In my case it is like this : ;C:\Program Files\Java\jre7\bin.

So, it doesn’t matter your system is 32 bit/64 bit until and unless you specify/Modify the PATH variable correctly.

Actually, the most conventional way of getting it done on Windows is

• Go to Control Panel
• Click System
• Open Advanced settings
• Click Environment Variables.

Path is one of the variables under «System Variables». This is where the system will search when you try to execute a command.

• just append the full path to the Bin folder under your Java installation path. You can copy it using Windows Explorer to avoid typing it manually
• click OK to close the dialogs.

To verify, open the command window aka console window (for example, WindowsKey-R cmd.exe ) and run:

If the java bin folder is in the path, the system will find and execute the javac.exe file located there, and you will see your Java version. Something like:

Very Simple:

You need to set the two environment variables only; PATH and java

=>Right Click on My computer

=>Properties

=>Click on left hand side bar menu «Advanced system settings» => Click on «Environment Variables» button refer below fig.

=>Follow the below steps to Set User variable and System variable.

To Set User variable named as «PATH«

• Click on «New» button in user variables section.
• Set the variable name as «PATH» and variable value as per your java installed version.(Shown in below fig.)

To Set System variable named as «java«

Click on «New» button in System variable tab.

Set the variable name as «java» and variable value as per your java installed version.(Shown in below fig.) Refer below images for the reference.

Java path..Error of jvm.cfg

Can anyone please tell me why I get the following error when I try to run my Java programs? The programs get compiled successfully but are not able to be run. I have already set the path of Java.

22 Answers 22

this should be an internal file of JRE and in general you shouldn’t deal with it when you’re running/compiling java.

Here you can find an explanation of what exactly this file is intended for. Bottom line, your Java installation is somehow corrupted, so as a first resort to resolve this issue, I suggest you to re-install jre.

You should ensure that you’re installing the right jre for your architecture.

Hope, this helps

Don’t think if this is a correct way. (perhaps proper installation of Java is a permanent solution). but this is a trick. )

Delete the “java.exe” file from “c:\windows” and “c:\windows\system32″. That should fix it.

In case you get here and scroll this far down, the newer Oracle versions of Java x86 and probably also x64 are horribly broken. You may find that after removing all versions of Java, and even manually deleting all the versions you find in c:/program files/ and c:/program files (x86)/ that you still can’t properly run a fresh install of Java.

I’m here to tell you why, and how to fix it.

Go to C:\Program Files\Common Files\ and DELETE the Oracle directory. It has a version of Java underneath it inside a junction (symlink) that is sequestered away from all your other installs. Bastards.

Now, also go to System Properties -> Advanced -> Environment Variables and edit the PATH under System Variables. Find the place where the Oracle folder is referenced, and delete it. Close all your windows down, reboot to be extra sure if you want.

Install the JRE or JDK. Open a command prompt and type ‘java’ and if it comes up, you’re golden. If not, go back to the PATH variable and add «C:\Program Files (x86)\Java\jdk1.8.0_221\bin» or whatever looks right for your machine.