Unsupported major.minor version 52.0 while trying to run an exe file

Question

GP is a .exe file that I downloaded from here. When I'm trying to run it, I receive the following error:

C:\GPP> gp -list
Exception in thread "main" java.lang.UnsupportedClassVersionError: pro/javacard/gp/GPTool : Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

C:\GPP>

How can I handle it? Should I remove JRE and install a newer or older version?

My Current version:

C:\GPP> java -version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)

C:\GPP> javac -version
javac 1.7.0_21

C:\GPP>

Is it possible to force Java use an specific major.minor version to run a program?

score 6 · Accepted Answer · answered Jul 01 '16 at 08:40

6

You need to install a Java 8 runtime as the application you downloaded was compiled with Java 8 as target platform.

answered Jul 01 '16 at 08:40

T. Neidhart

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May you please tell me how did you recognize the java version that this program is compiled with? – Ebrahim Ghasemi Jul 01 '16 at 09:07
1

52.0 corresponds to Java 8. – T. Neidhart Jul 01 '16 at 09:20
Where can I see other versions major.minor versions? – Ebrahim Ghasemi Jul 01 '16 at 09:23
1

here is a list of versions: http://www.rgagnon.com/javadetails/java-0544.html – T. Neidhart Jul 01 '16 at 09:25

Unsupported major.minor version 52.0 while trying to run an exe file

1 Answers1