Question

I want to read a String sentence from a Textfield and compare each letter in the String to my list of already made strings which look like this:

A = 123f;
B = 221d;
H = 2333gg;

And so on..

My question is: how can i read my message as individual strings lets say this is the message: "Hello World"

i want to be able to compare every word to my strings that i have made:
so “Hello World” it would compare the first letter “H” and it would make it into what i defined “H” to be, So it would output in a JLabel or anything else as 2333gg.

Thank you in advance!

Answer 1

I think you need to store your letters (A = …, B = …, H = …) into a Map, then you iterate through the input letters (that you can get from the input string using toCharArray()), and if the Map contains the letter as a key, you output the corresponding value. Something like this:

Map<Character, String> lettersMap = new HashMap<Character, String>();
lettersMap.put(Character.valueOf('A'), "123f");
lettersMap.put(Character.valueOf('B'), "221d");
lettersMap.put(Character.valueOf('H'), "2333gg");

String input = "Hello world";
StringBuffer sb = new StringBuffer();
char[] inputLetters = input.toCharArray();
for (int i = 0; i < inputLetters.length; i++) {
    Character letter = Character.valueOf(inputLetters[i]);
    if (lettersMap.containsKey(letter))
        sb.append(lettersMap.get(letter));
}
System.out.println(sb.toString());