How to extract characters and numbers from an Alphanumeric value

import java.util.Scanner;

public class AlphanumericString {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Scanner inpAlphaNumeric = new Scanner (System.in);
		StringBuilder strNumbers=new StringBuilder();
		StringBuilder strLetters=new StringBuilder();
		System.out.println("Enter an alpha numeric string (Ex:- H93Wkq61f)");
		String inpStr=inpAlphaNumeric.next();
		int strLen=inpStr.length();

		//Comparing within the range of ASCII's of Alphabets and Numbers
		while (--strLen >= 0) {
			if (inpStr.charAt(strLen) >= 'A' && inpStr.charAt(strLen) <='Z')
				strLetters.append(inpStr.charAt(strLen));
			else
				if (inpStr.charAt(strLen) >= 'a' && inpStr.charAt(strLen) <='z')
					strLetters.append(inpStr.charAt(strLen));
				else
					if (inpStr.charAt(strLen) >= '0' && inpStr.charAt(strLen) <='9')
						strNumbers.append(inpStr.charAt(strLen));
		}
		inpAlphaNumeric.close();
		System.out.println("The string of characters extracted from "+inpStr+" is="+strLetters.reverse().toString());
		System.out.println("The string of numbers extracted from "+inpStr+" is="+ Integer.valueOf(strNumbers.reverse().toString()));
		System.out.println("Add 1 to the Extracted number "+Integer.valueOf(strNumbers.toString())+" + "+"1="+(Integer.valueOf(strNumbers.toString())+1));
	}
}