Java unsupported major minor version 52 0

Question

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

User · Answer

I noticed that in netbeans Apache configuration in the servers tab  you can state the platform for your web application  I changed to 1 8 and it worked fine   I am targeting java 8 platform in my application   Hope that might t help

User · Answer

You have to compile with Java 1 7  But if you have   jsp files  you should also completely remove Java 1 8 from the system  If you use Mac  here is how you can do it

User · Answer

I assumed openjdk8 would work with tomcat8 but I had to remove it and keep openjdk7 only  this fixed the issue in my case  I really don t know why or if there is something else I could have done

User · Answer

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

[java] Java unsupported major minor version 52.0

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