Program to check if input is an integer or character in Java

Here we are a program to check if input is an integer or character in Java.

• Take input integer, character or any other data from user.
• Inside checkData() method, we iterate the user input through the for loop.
• In first If (str.charAt(i) >= ‘A’ || str.charAt(i) >= ‘a’) block it check it user input is character and store in String s1 parameter.
• In second else If (str.charAt(i) >= ‘0’ && str.charAt(i) <= ‘9’) block it check user input is number and store in String s1 parameter.
• In third else block it check, if user input is not an integer or character and store in String s1 parameter.
• Now Print the String s2 as an output value.

import java.util.Scanner;

public class CheckIntChar {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("Enter input value : ");
		String str = sc.next();
		System.out.println(checkData(str));
	}

	public static String checkData(String str) {
		String s1 = "";
		String s2 = "";
		for (int i = 0; i < str.length(); i++) {
			if (str.charAt(i) >= 'A' || str.charAt(i) >= 'a') {
				s1 = s1 + str.charAt(i);
				s2 = "it is character and value is:- " + s1;
			} else if (str.charAt(i) >= '0' && str.charAt(i) <= '9') {
				s1 = s1 + str.charAt(i);
				s2 = "it is integer and value is:- " + s1;
			} else {
				s2 = "this is not a character and number";
			}
		}

		return s2;
	}
}

Output :-
Enter input value :
@#
this is not a character and number