Question

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.  

Answer 1

import java.util.*;
public class FQ17{
static void display(String str, int p)
{char c;
String s1 = "", s2 = "";
for (int i = 0; i < str.length(); i++)
{c = str.charAt(i);
if (Character.isUpperCase(c) == true)
s1 += c;
else if (Character.isLowerCase(c) == true)
s2 += c;
}
if (p == 1)System.out.println(s1);
else System.out.println(s2);
}
static void display(String str, char chr)
{char ch;
String tmp = "";
str = str.toLowerCase();
for (int i = 0; i < str.length(); i++)
{
ch = str.charAt(i);
if (ch == "a" || ch == "e" || ch == "i" || ch == "o" || ch == "u")
tmp += ch;
}
if (chr == "v") System.out.println(tmp);
else System.out.println(str);
}
public static void main(String Acp[])
{Scanner ob = new Scanner(System.in);
System.out.println("1.Enter a String");
System.out.println("2.Enter an integer");
display(ob.nextLine(),ob.nextInt(); // Function Call
System.out.println("\n1.Enter a String with vowels, consonants");
System.out.println("2.Enter a character");
display(ob.next(), ob.next().charAt(0)); // Function Call
}}