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(7.52s) Convert byte code - optimized dex. Error java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.
link: You are correct. See https://www.b4x./?query=major.minor+version+52.0
link: Have you updated your java SDK? It now needs version 8 if not mistaken

Okey i solved it, my enviroment variable was pointed to JRE 1.7.XXXX, changed to JRE 1.8.XXXX and worked like a charm. Unsupported major.minor version 52.0 <--- this has nothing to do with the Java JDK version, it is a kind of error code. silly me...
link: Program started. App identifier: b4j.example.main Success: true StdOut: StdErr: java.lang.UnsupportedClassVersionError: : Unsupported major.minor ve
link: When I run the source code from post 1 I get the following error in the IDE log: java.lang.ExceptionInInitializerError Caused by: java.lang.RuntimeE

Hi, I get this in Logs at first run both Demo and Template: java.lang.UnsupportedClassVersionError: : Unsupported major.minor version 52.0 Any idea where is the problem? Compiling with Java 1.8 solved the problem
link: getting error java.lang.UnsupportedClassVersionError: : Unsupported major.minor version 52.0
link: Hi Alwaysbusy This looks amazing. I tried to run it in b4j and I get the following error. I previously upgraded java to version 8 update 66 I get it
link: I've been thinking... (yeah, I think too much) After seeing all the changes for the upcomming version, I wonder if its not time for a major version up

When try to run or debug the Push Server, output this error: java.lang.UnsupportedClassVersionError: $Customizer : Unsupported major.minor version 52.0 I´m using B4J v4.20 and the PushServer I got today in the first post thanks
link: All fine here: - B4J v4.20 - OKHTTP v1.01 - Jserver v2.51 - java jdk1.8.0_45 Maybe a Java JDK related error : see http://stackoverflow.-to-jetty-9-3

A quick search will reveal the answer: https://www.b4x./?query=Unsupported+major.minor+version+52.0 You need to install Java 8.
link: (1.33s) Convert byte code - optimized dex. Error java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor vers

Hi guys, I just install latest ver B4J & when compile old project, I got this err : main._process_globals (java line: 74) java.lang.UnsupportedClassVersionError: $Customizer : Unsupported major.minor version 52.0 On old B4J(forgot the version & JDK 1.7), this project compile without a problem. The

run(PlatformImpl.java:179) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:17) at com.sun.glass.ui.win.WinApplicati

https://www.b4x./?query=Unsupported+major.minor+version+52.0
link: (1.38s) Convirtiendo byte code a dex optimizado. Error java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.mino

(1.52s) Convert byte code - optimized dex. Error java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.

Example does not work. java.lang.UnsupportedClassVersionError: : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:791) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142

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