Ошибка java runtime environment not found

In this post, we will solve the «Java Runtime Environment not found error». This java error is one of the common errors faced by developers or end-users. Whenever you try to install any software which requires java like eclipse or Minecraft. Also, if you are new to java development, JDK or Java Development Kit is necessary for you.

Following this tutorial will help you to resolve all Java runtime errors. Additionally, you will learn to install, remove and set java variables in Windows10 and Ubuntu.

These are the very common errors you will find related to Java.

• java runtime environment not found
• java runtime environment not found windows 10
• eclipse java runtime environment not found
• eclipse java runtime environment not found path
• java SE runtime environment not found
• java runtime environment not found at bin javaw.exe
• unable to load java runtime environment
• cannot determine a valid java home
• java runtime environment not found mac

Let’s understand some basic concepts of Java runtime first. Check out this post, if you are getting a java command not found error.

What is a runtime environment?

Runtime basically means everything you require to run a program. Which includes environment variables, directory structure, common libraries etc. This can also be a virtual machine like

• JRE (Java Runtime Environment)
• CLR (Common Language Runtime) for .net framework

The target would be JRE or CLR for your program, need to decide by you. As soon as you execute any program, it’s in run time.

JRE vs JDK

What are the causes of the «Java Runtime environment not found» error

1. Java is not installed in your system
2. Java installation not completed (due to errors)
3. Environment variables of Java are not set
4. Java conflict due to more than one Java Runtime installation

Because JRE is platform-dependent, I have covered java installation, variable setup and un-installation for Windows and Ubuntu both.

Choose Windows 10 or Ubuntu 20.04 from the post and follow step by step to get java issues resolved.

Java download

Before installation, first, we need to download java —

Step1

Visit oracle.com and download JDK 15 or the latest available for your system. I am downloading it for Windows 10 (64-bit). The latest available versions of java are listed in the screenshot.

How to install Java runtime environment step by step

Let’s solve 1^st reason for «Java runtime environment not found», Because java is not installed.

Step2

First, check for any pre-installed java version —

Open the command prompt with «Run as administrator» and run java command.

C:Usersadmin> java --version

How to install java runtime environment in Windows 10

Step3

Once Download completes. Browse to the «jdk-15.0.1_windows-x64_bin.exe» file and double-click on it, to run the installer. Click Next.

Step4

I recommend keeping «C:Program filesjavajdk-15.0.1 (64-bit)» as the default installation folder. Select Next.

You may select different installation folders also. For example, if you are installing a second instance of java software. Click on change and browse for the target folder.

Step5

Let installation complete, it may take a few minutes.

Step6

Click close. Now you are done with java installation on windows 10.

How to set the environment variable for java in windows10

Set the Environment variable for java in windows 10 by these steps —

Step7

Type «environment» in the search window. Click «open» on «Edit the system environment variables«

Step8

Click on Environment variables.

Step9

Select «Path» > Then click Edit.

Step10

Select New > Give path of java installation directory > For example, «C:Program filesjavajdk-15.0.1bin» in my case. If you have selected a different folder for java installation in step4. You can enter your path to the bin folder.

Click OK.

Step11

Set «classpath» for java. Click «New» in the environment variable window. It allows to set up the new environment variables.

Step12

In «Variable name», enter «classpath«. Also in «variable value» provide path to your java installation till «lib» folder. In my case it is «C:program filesjavajdk-15.0lib > Select OK

Close all open environment variables windows by selecting OK.

How to check what version of java I have?

Installation and java variables have been set up. Now, Let’s validate the java installation and version.

Step13

Open the command prompt with «run as administrator» rights in windows 10.

Step14

Run the «java» command to check your Java and JRE (Java Runtime Environment) version.

java --version

Check java SDK version with javac command

Video tutorial-JRE error solved for Windows

«Java Runtime Environment not found» error fixed for windows 10

How to uninstall java from Windows 10

In case, you are not happy with your old java or JRE version and want to install a new. For that, you need to remove the old Java version.

Cleanup of Java from Windows 10 is pretty easy. Follow these steps to remove java from your system.

Step15

Search add or remove programs and click open

Step16

Select the java program and click Uninstall.

Java software will go from the window. You can clean up java variables also, set up in step10 and 11 earlier.

There are two ways to download and install java or JDK in Ubuntu 20.04

A.) Using the apt command

B.) Download the Oracle JDK package and install it manually

Let’s see both options one by one-

A.) How to install java or JRE in Ubuntu 20.04 using the apt command

To install Java in Ubuntu using the repository, Follow these commands

Step17

Update package index using apt command

$ sudo apt update

Step18

Check if you have any old java versions installed in the system. In my case, java is not installed.

$ sudo java -version

output

Command ‘java’ not found, but can be installed with:

sudo apt install openjdk-11-jre-headless              # version 11.0.9.1+1-0ubuntu1~20.04, or
sudo apt install default-jre                                      # version 2:1.11-72
———————-output-truncated————————————

Step19

Run the «apt» command to install java or JRE. I will install default-jre version 2:1.11-72 in my Ubuntu system from the list.

$ sudo apt install default-jre

Select «Y» and press Enter. Let installation complete. it will take a few minutes.

Step20

Check the java version

$ sudo java -version

output

How to Remove java from Ubuntu 20.04

Step21

Run apt command to remove JRE package installed. Press Y and then enter.

$ sudo apt autoremove "JRE package name"

B.) How to install the latest java or JDK in Ubuntu 20.04 from oracle (manually)

Step22

Java JRE download steps —

Visit oracle.com and download JDK 15 or the latest available .deb and transfer to your system. I am downloading Debian package jdk-15.0.1_linux-x64_bin.deb.

Alternatively, you can download java using wget command.

$ sudo wget "download link"

Reference output

Step23

Rename the .deb file using mv command, if required. Then install the Debian package using the dpkg command.

Learn more ways to install .deb package.

$ sudo dpkg -i ".deb-file-path"

output

Default installation directory path of java would be «/usr/lib/jvm/jdk-15.0.1/«. So, make a note of it, as it will be required to set up a Java_HOME variable.

How to set the «JAVA_HOME» variable in Ubuntu 20.04

Set the JAVA_HOME variable for all users in Ubuntu by editing the environment file.

Step24

Edit /system/environment file

$ sudo vi /etc/environment

Add path «/usr/lib/jvm/jdk-15.0.1/bin» to the last of the environment file. Then, save and exit.

Run source command to execute changes made in the environment file.

$ sudo source /etc/environment

Step25

Check your java version

$ sudo java -version

Remove java runtime environment package using dpkg command

Step26

Run the dpkg command with the —purge option to completely clean java from Ubuntu 20.04

$ sudo dpkg --purge "package-name"

For example,

$ sudo dpkg --purge jdk-15.0.1

Video Tutorial — JRE error solved for Ubuntu

Video on «How to fix java runtime environment error in Ubuntu 20.04»

Frequently Asked Questions (FAQs)

Ending notes

I hope after reading this article, you will be able to solve the «Java Runtime Environment not found error». Because majorly reasons for java related errors are, either Java is not installed or the java variable is not set.

if you still have issues, please comment and let me know, I will try to help you.

The Java Development Kit (JDK), the Java Virtual Machine (JVM), and the Java Runtime Environment (JRE) form a trio of Java platform components for developing and running Java apps.

A runtime environment is a piece of software designed to run other software. For example, as the runtime environment for Java, the JRE contains the Java class libraries, the Java class loader, and the JVM.

So if you don’t have JRE installed or you have an older version of the software, you might encounter one of the following messages:

• Error: Could not find Java SE Runtime Environment – you don’t have the Java SE version installed on your system
• This application needs version 1.x or higher of the Java Runtime Environment – you should update your Java version to the latest you can find on the official website
• A Java Runtime Environment(JRE) or Java Development Kit (JDK) must be available to run this app – like the first error, check if you have installed JRE or JDK and if not, install them

Today’s guide will explore the most efficient and easy methods to resolve the Java Runtime Environment not found and the other similar errors with Java. Read on for more details.

Why is JRE not installed?

In Windows and macOS, installing the Java Developmental Kit (JDK) in previous releases optionally installed a Java Runtime Environment (JRE).

However, with JDK 11, Oracle removed JRE to be installed optionally. Therefore, with JDK 11 release, the JRE or Server JRE is no longer offered, and only the JDK is provided.

Also, the Java Runtime Environment not found it could be caused by several other reasons, which we have listed below.

• Java is not installed on your PC.
• Java installation was not completed due to some errors.
• The environment variables of Java are not set.
• You might have more than one Java Runtime installation.
• A Windows misconfiguration can also trigger this problem.

How do I fix the Java runtime environment not found?

1. Run Windows troubleshooter

1. Select Start, and click on Settings.
2. Choose Update & Security, and then click Troubleshoot.
3. Select the type of troubleshooting you want to run, then select Run the troubleshooter.
4. Allow the troubleshooter to run and then answer any questions on the screen. 

Some PC issues are hard to tackle, especially when it comes to corrupted repositories or missing Windows files. If you are having troubles fixing an error, your system may be partially broken.
We recommend installing Restoro, a tool that will scan your machine and identify what the fault is.
Click here to download and start repairing.

You can try the recovery options if you see a message that no changes or updates are necessary. This is a built-in troubleshooter tool from Windows 10.

2. Download Java Runtime Environment (JRE)

1. Download JRE from the official website.
2. Choose if you need a 32bit or a 64bit architecture of JRE based on your PC specifications.
3. Click on the Agree and download button to start the actual download.
   

If you don’t know which version of Java is the correct version for your system, you can find out by searching in the Start menu the term System Information.

It would be best if you opened the first option that appears after the search and then checked the value under System Type (32-bit or 64-bit).

3. Install Java Runtime Environment (JRE)

1. Right-click on the downloaded JRE setup file.
2. Select Run as administrator and accept the installation prompt.
3. Click on the Install button to complete the installation.
4. You will receive a message that the installation was successful. Next, click on close the complete the installation and close the window. 

We recommend you check if there is a new Java update each time you encounter this issue. Unfortunately, the software will not update automatically, so you must perform this task manually.

How can I fix Java Runtime Environment not found on Windows 11?

The above solutions also work perfectly well for Windows 11 PC. So, to summarize the answers, here’s what you can do to fix the Java Runtime Environment not found on Windows 11.

• Uninstall all Java versions from your PC and install the latest one from the official website.
• Configure the Environment Variables for Java on your PC.
• Reset your PC.
• Check for viruses or malware.

Where is JRE located?

1. Open the Start menu.
2. Click on Control Panel.
3. Select Java.
4. Switch to the Java tab.
5. Click View.
6. Check the Path column for the version of the JRE you have installed.
7. You will see a path. For example C:appsjdkjrebinjavaw.exe
8. So, the path is C:appsjdkbin

That is it. You should now have the latest version of Java Runtime Environment on your PC and no longer receive the error message.

Please write us in a comment below if these solutions helped you or if there are any other suggestions that we should include in our article.

When trying to open a Java .jar file through the command prompt, such as using the command “Java -Jar xxxx.jar”, you might encounter the following error message:

Error: opening registry key ‘SoftwareJavaSoftJRE’

Error: could not find java.dll

Error: Could not find Java SE Runtime Environment.

This could be due to several factors, including but not limited to:

• Corrupted registry
• Missing Java path in your Environment Variables
• Java installation folder being moved

For example, we encountered this issue when updating Java SE to the latest version – we likely previously had a 32-bit Java installation, and when running the 64-bit Java installer, our Java path changed.

Luckily, this is fairly easy to fix, as it just requires addressing one of the above problems with the appropriate solution. Follow our steps below to get your Java commands via command prompt working again, and leave a comment in the comments section if you encounter any further issues (or know of a better solution).

1. Delete all previous versions of Java (using “Programs and Features” uninstall process). If java folder is remains in “C:/Program Files/…”, please delete it.
2. Clean up your registry (delete your java key):
3. Go to Start and then Run
4. Type in ‘regedit’ in the edit field
5. Go to HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Uninstall
6. Under this Uninstall folder you will find many registry entries within curly brackets.
7. Click on Edit tab and then Find
8. Note: Highlight Uninstall folder before performing search for particular registry.
9. Enter version string as value to find corresponding registry entry to be deleted.
10. Once you find registry key, highlight that key and then Right click on it and choose Delete
11. Confirm the delete and click Yes

Steps for finding registry keys for any version of Java 7

Follow format 7.0.xxx
where xxx can be 100, 120, 130, 140 and so on.
for example:

• Type 7.0.100 in search field, finds registry key for Java7 update 10
• Type 7.0.120 in search field, finds registry key for Java7 update 12
• Type 7.0.180 in search field, finds registry key for Java7 update 18

Steps for finding registry keys for any version of Java 6

Follow format 6.0.xxx
where xxx can be 100, 120, 130, 140 and so on.
for example:

• Type 6.0.100 in search field, finds registry key for Java6 update 10
• Type 6.0.120 in search field, finds registry key for Java6 update 12
• Type 6.0.180 in search field, finds registry key for Java6 update 18

Steps for finding registry keys for any version of Java 1.5

Follow format 1.5.0.xxx
where xxx can be 100, 120, 130, 140 and so on.
for example:

• Type 1.5.0.100 in search field, finds registry key for jre1.5.0_01
• Type 1.5.0.120 in search field, finds registry key for jre1.5.0_12
• Type 1.5.0.180 in search field, finds registry key for jre1.5.0_18
• Steps for finding registry keys for any version of Java 1.4

Follow format 1.4.2_xxx
where xxx can be 01, 12, 13, 14 and so on.
for example:

• Type 1.4.2_01 in search field, finds registry key for jre1.4.0_01
• Type 1.4.2_12 in search field, finds registry key for jre1.4.0_12
• Type 1.4.2_18 in search field, finds registry key for jre1.4.0_18

Reinstall Java and set system variable JAVA_HOME to your JRE (or JDK) path.

Eg:

JAVA_HOME - C:Program FilesJavajdk1.7.0_71

Path - C:Program FilesJavajdk1.7.0_71bin

You can check if this was a successful solution with the following commands

echo %JAVA_HOME%

java -version

Manually open command window to Java pathway.As a side note, you can also launch a command prompt directly from within the Java folder – navigate to your C:Program FilesJavabin folder (or wherever your Java is installed), hold Shift + Right click inside the window, and click “Open a command window here”.