Java - Get first letter of string

Question

I am trying to extract the first letters of each word in a sentence the user has spoken into my app. Currently if the user speaks "Hello World 2015" it inserts that into the text field. I wish to split this so if the user speaks "Hello World 2015" only "HW2015" is inserted into the text field.

final ArrayList<String> matches = data.getStringArrayListExtra(
                RecognizerIntent.EXTRA_RESULTS);

The matches variable is storing the users input in an array.I have looked into using split but not sure exactly how this works.

How would I achieve this?

Thank You

Answer 1

You can split a string into an array of string by doing this:

String[] result = my_string.split("\\s+");  // This is a regex for matching spaces

You could then loop over your array, taking the first character of each string:

// The string we'll create
String abbrev = "";

// Loop over the results from the string splitting
for (int i = 0; i < result.length; i++){

    // Grab the first character of this entry
    char c = result[i].charAt(0);

    // If its a number, add the whole number
    if (c >= '0' && c <= '9'){
        abbrev += result[i];
    }

    // If its not a number, just append the character
    else{
        abbrev += c;
    }
}