Design a class overloading and a method display( ) as follows:

1. void display(String str, int p) with one String argument and one integer argument. It displays all the uppercase characters if 'p' is 1 (one) otherwise, it displays all the lowercase characters.
2. void display(String str, char chr) with one String argument and one character argument. It displays all the vowels if chr is 'v' otherwise, it displays all the alphabets.

import java.util.Scanner;

public class Overloading
{
    void display(String str, int p) {
        
        int len = str.length();
        
        for (int i = 0; i < len; i++) {
            char ch = str.charAt(i);
            if (p == 1 && Character.isUpperCase(ch)) {
                System.out.println(ch);
            }
            else if (p != 1 && Character.isLowerCase(ch)) {
                System.out.println(ch);
            }
        }
        
    }

    void display(String str, char chr) {
        
        int len = str.length();
        for (int i = 0; i < len; i++) {
            char ch = str.charAt(i);
            ch = Character.toUpperCase(ch);
            if (chr != 'v' && Character.isLetter(str.charAt(i)))
                System.out.println(str.charAt(i));
            else if (ch == 'A' ||
                    ch == 'E' ||
                    ch == 'I' ||
                    ch == 'O' ||
                    ch == 'U') {
                    System.out.println(str.charAt(i));
            }
        }
        
    }
    
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter string: ");
        String s = in.nextLine();
        
        Overloading obj = new Overloading();
        System.out.println("p=1");
        obj.display(s, 1);
        System.out.println("\np!=1");
        obj.display(s, 0);
        System.out.println("\nchr='v'");
        obj.display(s, 'v');
        System.out.println("\nchr!='v'");
        obj.display(s, 'u');
    }
}