Tells me i have 0 plugins installed

So i put in the plugin folder and after i started the server i did /plugins . It told me i had 0. i went to the console and got this message. PLEASE HELP!


org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/Dashu/CreeperSpawn/Main has been compiled by a more recent version of the Java Runtime (class file version 56.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at org.bukkit.craftbukkit.v1_16_R2.CraftServer.loadPlugins(CraftServer.java:383) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at net.minecraft.server.v1_16_R2.DedicatedServer.init(DedicatedServer.java:183) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:808) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$0(MinecraftServer.java:164) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_265]
Caused by: java.lang.UnsupportedClassVersionError: me/Dashu/CreeperSpawn/Main has been compiled by a more recent version of the Java Runtime (class file version 56.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_265]
at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_265]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_265]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:163) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:96) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_265]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_265]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_265]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_265]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot1.16.3.jar:git-Spigot-17d78db-2577f9b]

 

Update your Java (and read your errors)

 

Hey i installed the latest java and restarted the server and gave me exact thing it did last time

 

Compile the plugin in Java 8.

 

You need to update the java location in your path variable so your commandline uses the new java version.
https://docs.oracle.com/javase/tutorial/essential/environment/paths.html

 

Did you make sure that in your IDE that you also selected the right java version? That happened to me for a while until I figured it out. Go into your IDE and make sure that it is compiling it in the java version you installed.