B4J Question Remote debugging with B4J-Bridge Issue


Licensed User
I am having a problem installing the B4J-Bridge. I get this error when I try to install on the MAC. Any help would be welcome.

Last login: Sat Jul 17 21:58:53 on ttys000
[email protected] ~ % java -version
java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)
[email protected] ~ % cd downloads/
[email protected] downloads % java -jar b4jbridge.jar
Error: Unable to access jarfile b4jbridge.jar
[email protected] downloads % java -jar b4j-bridge.jar
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: b4j/example/main has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)


Well-Known Member
Licensed User
Longtime User
b4j/example/main has been compiled by a more recent version of the Java Runtime
here says that you are using 1.8 jdk and the compiled jar (b4j bridge) is for jdk 11, try using jdk 11 and it will work.
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