How to remove a particular character from a string?

JAVA Program

public class Main {
	public static void main(String args[]) {
		String str = "this is Scanftree;;
		System.out.println(removeCharAt(str, 3));
	}
	public static String removeCharAt(String s, int pos) {
		return s.substring(0, pos) + s.substring(pos + 1);
	}
}

Output

this is Scanftree