Eclipse - Unsupported Major.Minor Version 53.0, 52.00, 51.0 Mistake Inwards Java

The UnsupportedClassVersionError is a large nightmare for Java developers, in all likelihood the side past times side biggest afterwards NoClassDefFoundError in addition to ClassNotFoundException but its slightly easier to solve. The root effort of this mistake is that your code is compiled using higher JDK version in addition to you lot are trying to run it on the lower version. For example, the Unsupported major.minor version 53.0 agency your code is compiled inwards JDK ix (the flat version 52 corresponds to JDK 9) in addition to you lot are trying to run it on whatsoever JRE lower than Java 9, in all likelihood JDK 8, 7, or 6.

Similarly, the Unsupported major.minor version 52.0 agency your code is compiled using JDK 8 compiler in addition to you lot are trying to run it on lower JVM e.g. JDK vii or 7.

And, finally, the Unsupported major.minor version 51.0 agency your code is compiled using JDK vii in addition to you lot are trying to run it on JRE six or 5.

This mistake volition non occur if you lot compile inwards JDK vii in addition to running inwards JDK 8 because Java is backward compatible but it won't operate otherwise because higher version to a greater extent than oftentimes than non has features which are non supported past times lower version.

I convey written how create deal with UnsupportedClassVersionError inwards past but today we'll focus on dealing amongst this mistake inwards Eclipse. For example, if you lot are running your plan inwards Eclipse in addition to getting this mistake than what should you lot do? Or how create you lot solve this mistake inwards Eclipse?

Before you lot solve this mistake you lot involve to empathize the Eclipse setup e.g. how your projection or Java classes are compiled in addition to how they are executed. When you lot create a projection inwards Eclipse in addition to then you lot lead a JRE, which is used for both compilation in addition to execution.

Btw, if you lot are novel to Eclipse IDE in addition to then I advise you lot to kickoff become through Beginners Eclipse Java IDE Training Course to larn basic features of Eclipse IDE.

But, you lot tin alter the JRE for execution nether run configuration in addition to sometimes it also option upward the default JRE. That's where the employment occurs. If you lot are using JDK 8 inwards your projection equally shown below but if you lot are using whatsoever lower JRE nether run configuration in addition to then you lot volition acquire Unsupported major.minor version 52.0 Error inwards Eclipse.

In club to solve this mistake but role the JDK 8 or JDK 8 on Run configuration for your projection equally shown below:

Solving Unsupported major.minor version 53.0, 52.00, 51.0 Error

Now to empathize this province of affairs better, let's create this mistake in addition to solve it. I convey a Java projection in addition to a Java flat in addition to my projection are configured to role the JDK 8 inwards create path equally shown below:

Now, but compile in addition to run the plan which creates a run configuration for it automatically amongst correct JRE version. The plan volition run fine.

Now, let's alter the JRE version inwards the Eclipse Run Configuration:

Now, if you lot run the same program, this fourth dimension it volition throw Unsupported major.minor version 52.0 error:

java.lang.UnsupportedClassVersionError: Demo : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:281)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Exception inwards thread "main"

Here is the screenshot from Eclipse IDE:

Bingo, this happens because right away you lot are trying to run a Java plan which is compiled at higher JDK into lower JRE. When you lot compile, flat files are created which has major in addition to shaver version depending upon which javac is used to create them.

They tin exclusively run on the same version of JRE or the higher version of JRE. If you lot run them inwards the lower version they volition throw this "java.lang.UnsupportedClassVersionError: Demo : Unsupported major.minor version 52.0" error.

In short:
1) If you lot acquire Unsupported major.minor version 53.0 Error in addition to then brand certain you lot convey JDK ix nether your run configuration inwards Eclipse.

2) If you lot acquire Unsupported major.minor version 52.0 Error in addition to then brand certain you lot convey JDK 8 nether your run configuration inwards Eclipse.

3) If you lot acquire Unsupported major.minor version 51.0 Error in addition to then brand certain you lot convey JDK vii on your run configuration inwards Eclipse.


That's all well-nigh how to solve the Unsupported major.minor version 53.0, 52.0, in addition to 51.0 Error inwards Eclipse IDE. Just cheque which JRE or JDK you lot are using for compiling in addition to running your Java program. You tin cheque that within your create path in addition to run configuration. Make certain you lot role same or higher version of JRE to run your plan in addition to then you lot used for compiling them. This volition solve this error. If you lot desire to larn to a greater extent than well-nigh Eclipse IDE itself, in addition to then become through  Beginners Eclipse Java IDE Training Course, ane of the quick ways to larn Eclipse IDE.


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Thanks for reading this article, if you lot similar this article in addition to then delight percentage amongst your friends in addition to colleagues too. If you lot convey whatsoever uncertainty or questions in addition to then delight drib a comment.

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