Question

I have a message, for example KU7.
Also, I have a set of rules, like this:

Q K S 7 J ... U 
R Y L B 8 ... W

and so on. I need to translate the message using this rules. There is ~20. Translated message will be YWB.

What I have tried:

To create a method that takes a char as and argument, method has a lot of case blocks (all rules) and returns translated char. Then using for loop I loop through the message and translate symbol by symbol.
But I think it is not good solution.

Can anybody provide me with other ideas / solutions / links to similar questions?

Answer 1

You can use HashMap for storing keys and corresponding entries.

HashMap<String,String> map = HashMap<String,String>();
map.put("Q","R");
...

String input  = "KU7";
String result = "";

for(char c : input.toCharArray())
    result += map.get(c+"");