Duplicate Characters Finder

DuplicateCharactersInString.java

package com.javamultiplex.string;

import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Scanner;

/**
 * 
 * @author Rohit Agarwal
 * @category String Interview Question
 * @Problem Print all duplicate characters in a String
 * 
 */
public class DuplicateCharactersInString {

	public static void main(String[] args) {

		Scanner input = null;
		try {
			input = new Scanner(System.in);
			System.out.println("Enter String: ");
			String string = input.next();
			// Converting String to char array.
			char[] stringToChar = string.toCharArray();
			int orignalLength = stringToChar.length, charCount = 0;
			String newString = getStringAfterDuplicatesRemoval(stringToChar);
			// Converting String to char array.
			char[] stringToCharAfterDuplicateRemoval = newString.toCharArray();
			int newLength = stringToCharAfterDuplicateRemoval.length;
			if (string.equals(newString)) {
				System.out.println("No duplicate character available.");
			} else {
				System.out.println("Duplicate characters are: ");
				for (int i = 0; i < newLength; i++) {
					charCount = 0;
					for (int j = 0; j < orignalLength; j++) {
						if (stringToCharAfterDuplicateRemoval[i] == stringToChar[j]) {
							charCount++;
						}
					}
					if (charCount > 1) {
						System.out.println(stringToCharAfterDuplicateRemoval[i]);
					}
				}
			}
		} finally {
			if (input != null) {
				input.close();
			}
		}

	}

	// Removing duplicates by converting char Array to Set.
	private static String getStringAfterDuplicatesRemoval(char[] stringToChar) {
		HashSet<Character> set = new LinkedHashSet<>();
		String result = "";
		int orignalLength = stringToChar.length;
		for (int i = 0; i < orignalLength; i++) {
			set.add(stringToChar[i]);
		}
		Iterator<Character> iterator = set.iterator();
		while (iterator.hasNext()) {
			result += iterator.next(); // Converting Set to String
		}
		return result;
	}

}