Question

I am attempting to set up a simple Morse encoder using a hashmap in android. Putting values in the hashmap seems pretty straightforward like so:

    HashMap<String, String> translate = new HashMap<String, String>();

//initializing translate
translate.put("A",".-");
//same for all letters of alphabet and numbers

However I am having difficulty finding an effective way to utilize the data of the key values for export to another method. I plan to use these values in a string method and simply display it on the phone screen for the user when they type a letter. For example, if they type in “A” the hash map will be queried for “A” and return a “.-“. I have never worked with hashmaps before and can’t find a suitable example.

Any help on how to access these keys within an android environment will be appreciated!

Answer 1

Use HashMap.get(), so:

translate.get("A");  // returns ".-"

The object returned is exactly the same as the object supplied in the 2nd argument to put(). So if you put a URL in (and the Map is suitably typed) you will get the same URL instance returned from get().