unable to start the server with java error

[jluc2808]

hello, when i start : java -jar restful-harmony-1.0.0.jar 192.168.1.32 i receive an error : Exception in thread "main" java.lang.UnsupportedClassVersionError: com/bwssystems/restfulharmony/HarmonyRestServer : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:808) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:443) at java.net.URLClassLoader.access$100(URLClassLoader.java:65) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.net.URLClassLoader$1.run(URLClassLoader.java:349) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:348) at java.lang.ClassLoader.loadClass(ClassLoader.java:430) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:323) at java.lang.ClassLoader.loadClass(ClassLoader.java:363) at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

my java -version is : java -version java version "1.7.0_221" OpenJDK Runtime Environment (IcedTea 2.6.18) (linux-gnu build 1.7.0_221-b02) OpenJDK 64-Bit Server VM (build 24.221-b02, mixed mode)

is there an obvious problem with this java version ?

thanks

[bwssytems]

I will take a look at that jar. It may be compiled with java 11