How to ensure Java JDK and JRE match and how to make them match if they dont

Question

I have been trying to get my JDK and JRE to match for a couple hours now, but do not know what to do. Any help appreciated.

I've checked the versions and realized they are different. I have already installed the latest JDK but do not know how to change the JRE to match the JDK.

javac -version javac 12.0.1

java -version java version "1.8.0_211"

C:\Users\jacob\OneDrive\Desktop\Code>java Ah Error: A JNI error has occurred, please check your installation and try again Exception in thread "main" java.lang.UnsupportedClassVersionError: Ah has been compiled by a more recent version of the Java Runtime (class file version 56.0), this version of the Java Runtime only recognizes class file versions up to 52.0

I expect to be able to have the same versions so that my code will run, but it will not run.

The latest JRE can be found [here](https://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html). — Robert Harvey, May 06 '19 at 15:48

score 0 · Accepted Answer · answered May 06 '19 at 15:54

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It means that the environment variable for javac ( java compiler ) is pointing to a different version compared to the environment variable for java( java run-time ) command.

Check this comment and set up the correct environment variables.

answered May 06 '19 at 15:54

BogdanSucaciu

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The JRE path appears to be generic (i.e. not version-specific). – Robert Harvey May 06 '19 at 16:18

score 0 · Answer 2 · answered May 08 '19 at 12:14

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Try uninstalling JRE and only install JDK. It worked for me.

answered May 08 '19 at 12:14

Jia Quan Wee

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How to ensure Java JDK and JRE match and how to make them match if they dont

2 Answers2

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