the code is showing correct result but character class is not abstract in java so how we are using its method without creating its object?

Question

import java.io.*;
import java.util.*;


public class Solution {

    public static void main(String[] args) {

        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        String B=sc.next();
        array1=A.toCharArray();
        array2=B.toCharArray();
        array1[0]=Character.toUpperCase(array1[0]);
        array2[0]=Character.toUpperCase(array2[0]);
        System.out.print(array1);
        System.out.print(" ");
        System.out.print(array2);

    }
}