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

The UnsupportedClassVersionError is a large nightmare for Java developers, belike the side past times side biggest afterwards NoClassDefFoundError together with ClassNotFoundException but its slightly easier to solve. The root drive of this fault is that your code is compiled using higher JDK version together with you lot are trying to run it on the lower version. For example, the Unsupported major.minor version 53.0 way your code is compiled inwards JDK ix (the shape version 52 corresponds to JDK 9) together with you lot are trying to run it on whatever JRE lower than Java 9, belike JDK 8, 7, or 6.

Similarly, the Unsupported major.minor version 52.0 way your code is compiled using JDK 8 compiler together with you lot are trying to run it on lower JVM e.g. JDK seven or 7.

And, finally, the Unsupported major.minor version 51.0 way your code is compiled using JDK seven together with you lot are trying to run it on JRE vi or 5.

This fault volition non occur if you lot compile inwards JDK seven together with running inwards JDK 8 because Java is backward compatible but it won't operate otherwise because higher version mostly has features which are non supported past times lower version.

I convey written how practise deal with UnsupportedClassVersionError inwards past but today we'll focus on dealing alongside this fault inwards Eclipse. For example, if you lot are running your plan inwards Eclipse together with getting this fault than what should you lot do? Or how practise you lot solve this fault inwards Eclipse?

Before you lot solve this fault you lot postulate to empathise the Eclipse setup e.g. how your projection or Java classes are compiled together with how they are executed. When you lot practise a projection inwards Eclipse together with then you lot pick out a JRE, which is used for both compilation together with execution.

Btw, if you lot are novel to Eclipse IDE together with then I advise you lot to starting fourth dimension become through Beginners Eclipse Java IDE Training Course to larn basic features of Eclipse IDE.

But, you lot tin laissez passer on the sack alter the JRE for execution nether run configuration together with sometimes it also selection upwards the default JRE. That's where the work occurs. If you lot are using JDK 8 inwards your projection every bit shown below but if you lot are using whatever lower JRE nether run configuration together with then you lot volition acquire Unsupported major.minor version 52.0 Error inwards Eclipse.

In social club to solve this fault only purpose the JDK 8 or JDK 8 on Run configuration for your projection every bit shown below:

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

Now to empathise this province of affairs better, let's practise this fault together with solve it. I convey a Java projection together with a Java shape together with my projection are configured to purpose the JDK 8 inwards construct path every bit shown below:

Now, only compile together with run the plan which creates a run configuration for it automatically alongside 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 instantly you lot are trying to run a Java plan which is compiled at higher JDK into lower JRE. When you lot compile, shape files are created which has major together with fry version depending upon which javac is used to practise them.

They tin laissez passer on the sack alone 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 together with 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 together with 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 together with then brand certain you lot convey JDK seven on your run configuration inwards Eclipse.


That's all nearly how to solve the Unsupported major.minor version 53.0, 52.0, together with 51.0 Error inwards Eclipse IDE. Just banking concern check which JRE or JDK you lot are using for compiling together with running your Java program. You tin laissez passer on the sack banking concern check that within your construct path together with run configuration. Make certain you lot purpose same or higher version of JRE to run your plan together with then you lot used for compiling them. This volition solve this error. If you lot desire to larn to a greater extent than nearly Eclipse IDE itself, together with then become through  Beginners Eclipse Java IDE Training Course, i of the quick ways to larn Eclipse IDE.


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Thanks for reading this article, if you lot similar this article together with then delight portion alongside your friends together with colleagues too. If you lot convey whatever uncertainty or questions together with then delight drib a comment.