public class RemoveWhiteSpaces {

String removeWhiteSpaces(String input){

StringBuilder output = new StringBuilder();

char[] charArray = input.toCharArray();

for(char c : charArray) {

if (!Character.isWhitespace(c))

output.append(c);

}

return output.toString();

}

public static void main(String[] args) {

RemoveWhiteSpaces removeWhiteSpaces = new RemoveWhiteSpaces();

String word = "fdkjfkdj kjkjfd ";

System.out.print("remove whitespaces from `");

System.out.print(word);

System.out.print("` to no space `");

System.out.print(removeWhiteSpaces.removeWhiteSpaces("kjkfd kjfkdj "));

System.out.println("`");

}

}