Java unsupported major minor version 52.0

java html applet
user3329290 picture user3329290 · Apr 23, 2014 · Viewed 258.1k times · Source

I can not launch my java application as a web applet in HTML (I am using HTML 4.01, I know it doesn't work in html5). The error message it returns is:

java : Unsupported major.minor version 52.0

I have tried downgrading my java JRE/JDK/SDK but I still get the same error message. The current version of java I am now using is 1.8.0_05.

Answer

Leonard Brünings picture Leonard Brünings · Apr 23, 2014

Your code was compiled with Java Version 1.8 while it is being executed with Java Version 1.7 or below.

In your case it seems that two different Java installations are used, the newer to compile and the older to execute your code.

Try recompiling your code with Java 1.7 or upgrade your Java Plugin.

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