How to convert a String array to char array in Java

Question

We are given an array of Strings and what we require is a char[], i.e, array of all characters in all the Strings For example:

Input: [i, love, you]

output:

Answer 1

In Java 8 we can use streams.

public char[] convert(String[] words) {
    return Arrays.stream(words)
            .collect(Collectors.joining())
            .toCharArray();
}

Here we created a stream from an array using Array.stream(T[] array) where T is the type of the array elements. Than we obtain a string using Collectors.joining(). Finally we get a char array using the String's toCharArray() method.