Map use

public class RemoveDuplicatesUsingMap {
    public static void main(String[] args) {
        String inputString = "Akash Chikhalonde";
        
        // Create a new LinkedHashMap to preserve the order of characters
        Map<Character, Integer> charMap = new LinkedHashMap<>();
        
        // Iterate over each character in the string
        for (int i = 0; i < inputString.length(); i++) {
            char c = inputString.charAt(i);
            
            // If the character is not already in the map, add it with a value of 1
            if (!charMap.containsKey(c)) {
                charMap.put(c, 1);
            }
        }
        
        // Use a StringBuilder to build the output string without duplicates
        StringBuilder sb = new StringBuilder(charMap.size());
        
        // Iterate over the keys of the map and append them to the StringBuilder
        for (Character c : charMap.keySet()) {
            sb.append(c);
        }
        
        // Print the output string
        System.out.println(sb.toString());
    }
}