How can you determine the number of words in a string in Java?

• A. Using the length() method
• B. Using the split() method
• C. Using int parse
• D. Using wordCount() method

Answer: (B)

To determine the number of words in a string in Java, utilizing the split() method is the most effective approach. The split() method allows you to divide a string into an array of substrings based on a specified delimiter—typically a space or a regular expression that matches whitespace.

When you call split("\\s+") on a string, it separates the string into words by looking for one or more whitespace characters. The resulting array's length will give you the number of words present in the original string, which is a straightforward and efficient way to achieve this goal.

For instance:

String sentence = "Hello world!";

String[] words = sentence.split("\\s+");

int numberOfWords = words.length; // numberOfWords will be 2

In this example, the split() method successfully breaks the sentence into individual words, and by checking the length of the resulting array, you can easily count how many words there are.

The length() method only returns the total number of characters in the string, not the count of words. The int parse is not relevant in this context, as it typically relates to converting strings to integers rather than word counting. Lastly, while the wordCount() method may sound plausible