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

You can do that like this

char[] allchar = new char[total]; // Your code till here is proper

// Copying the contents of the 2d array to a new 1d array
int counter = 0; // Counter as the index of your allChar array
for (int i = 0; i < a1.length; i++) { 
    for (int j = 0; j < a1[i].length; j++) { // nested for loop - typical 2d array format
        allchar[counter++] = a1[i][j]; // copying it to the new array
    }
}