3. Object-Oriented Programming

Activity 1: Adding the Frequency-of-Symbol Calculation to WordTool

Solution

Add a method to the previously created WordTool class to calculate the frequency of a certain symbol. To do so, perform the following steps:

1. Add a method to count the number of words in a string.

   public int wordCount ( String s ) {
       int count = 0;  // variable to count words
       // if the entry is empty or is null, count is zero
       // therefore we evaluate it only otherwise
       if ( !(s == null || s.isEmpty()) ) {
           // use the split method from the String class to
           // separate the words having the whitespace as separator
           String[] w = s.split("\\s+");
           count = w.length;
     ...