Plugin runs fine on windows but not centOS

So, I couldn't run a plugin on my centOS VPS.

I decided to make a small plugin that simply says "yo" when you do /c.

It runs perfectly fine on windows.

But when I do it on my centOS VPS, I get this error.

[23:01:37 ERROR]: Could not load 'plugins/test.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: test/Main : Unsupported major.minor version 51.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:336) ~[Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:258) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:288) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.reload(CraftServer.java:740) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.Bukkit.reload(Bukkit.java:301) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:23) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchCommand(CraftServer.java:643) [Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.craftbukkit.v1_8_R1.CraftServer.dispatchServerCommand(CraftServer.java:629) [Craftbukkit.jar:git-Spigot-"4133000"]
at net.minecraft.server.v1_8_R1.DedicatedServer.aM(DedicatedServer.java:353) [Craftbukkit.jar:git-Spigot-"4133000"]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:317) [Craftbukkit.jar:git-Spigot-"4133000"]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:627) [Craftbukkit.jar:git-Spigot-"4133000"]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:530) [Craftbukkit.jar:git-Spigot-"4133000"]
at java.lang.Thread.run(Thread.java:701) [?:1.6.0_35]
Caused by: java.lang.UnsupportedClassVersionError: test/Main : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_35]
at java.lang.ClassLoader.defineClass(ClassLoader.java:643) ~[?:1.6.0_35]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.6.0_35]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) ~[?:1.6.0_35]
at java.net.URLClassLoader.access$000(URLClassLoader.java:73) ~[?:1.6.0_35]
at java.net.URLClassLoader$1.run(URLClassLoader.java:212) ~[?:1.6.0_35]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_35]
at java.net.URLClassLoader.findClass(URLClassLoader.java:205) ~[?:1.6.0_35]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Craftbukkit.jar:git-Spigot-"4133000"]
at java.lang.ClassLoader.loadClass(ClassLoader.java:323) ~[?:1.6.0_35]
at java.lang.ClassLoader.loadClass(ClassLoader.java:268) ~[?:1.6.0_35]
at java.lang.Class.forName0(Native Method) ~[?:1.6.0_35]
at java.lang.Class.forName(Class.java:274) ~[?:1.6.0_35]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[Craftbukkit.jar:git-Spigot-"4133000"]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[Craftbukkit.jar:git-Spigot-"4133000"]
... 14 more


Any help?

 

I posted this just before I went to bed. And, while I was trying to fall asleep, I realized something. I was trying to figure out what was different from my laptop to my VPS, and then suddenly it dawned on me.. Java. Thank you, guys, I'm gonna go update java. Requesting lock.