public class Main {  
    static void over_Var(float a, Character... ab) {
    static void over_Var(Character... ab) {
    public static void main(String[] args) {
        System.out.println("Hello World");
        over_Var(1, 'm');
        over_Var('k', 'm');

I’m getting error as this:

Main.java:19: error: reference to over_Var is ambiguous
    over_Var('k', 'm');
 both method over_Var(float, Character...) in Main and method over_Var(Character...) in Main 
 match 1 error

The code works fine if I use char instead of Character, or remove the line over_Var('k', 'm');

Why am I getting error like this?