Minecraft Plugin Programming (Java)?

I just created a plugin for my Localhost, but I get error messages. Here is the source code: https://hastebin.com/...uwune.java

The mistakes:

Row 12,13,14> "String 10/11/12/13" is underlined in red and in row 15 only "String" is underlined in red.

For the Main.java class I already have "getServer (). GetPluginManager (). RegisterEvents (new Colorsigns (), this);" written in clear. Maybe someone in the Colorsigns class can write me the revised code via hastebin or something.

Too little information. Best send the whole class and the entire error message.

That's the whole class xD But the error messages I have just not on site, I think there was the error that I supposedly forgot zichen

Try renaming the string so I do not always do numbers.

Yes, I see it now also xd.
But in any case, send the entire error message from the console, so I can look at it.

Ok, here are 4 screenshots:

1:

2:

3:

4:

You can't define variables with integer values. Please read again the naming conventions for Java (https://www.javatpoint.com/java-naming-conventions).

Theoretically already. But I think I did it wrong here. Jahey xD