Create a char array for every string inside a string array

Question

I'm trying to implement in java this little project: I want to rename the episodes of an entire season in a series using a text file that has the names of all the episodes in that season. To that end I wrote a code that reads the text file and stores every line of text (the name of an episode) as a string array, where every element of the array stores the name of one episode. Also, I wrote a code that takes the FIRST element of that array (an array called arrayLines[]) and renames a given file. This code works like a charm. What I want to do next is to create a char array for every element in the string array arrLines[]. The pseudo-code i'm thinking to implement is something like this:

for(int i=0; i<arrLines.length; i++){
    char line_i+1[] = arrLines[i];
}

and thus getting many arrays with the names line_1, line_2,..., line_arrLines.length, with the name of every episode stored as a char array.

How can I implement something like this?

shmosel · Accepted Answer · 2016-06-02 20:13:31Z

2

Just use a 2-dimensional char array:

char[][] lines = new char[arrLines.length][];
for (int i = 0; i < arrLines.length; i++) {
    lines[i] = arrLines[i].toCharArray();
}

If you have Java 8, you can use Streams:

char[][] lines = Arrays.stream(arrLines)
        .map(String::toCharArray)
        .toArray(char[][]::new);

answered Jun 2, 2016 at 20:13

shmosel

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2 Comments

Gabriel Edery Over a year ago

thanks a lot! worked perfectly (both of them)! what's a Stream? first time I've heard about them.

shmosel Over a year ago

@GabrielEdery it's a broad subject; if you want to read up on it, you can start here, here and here.

tmj010 · Accepted Answer · 2016-06-02 20:12:01Z

0

You can use the String toCharArra method.

    for(int i = 0; i < strArray.length; i++) {
        char[] charArray = strArray[i].toCharArray();
    }

answered Jun 2, 2016 at 20:12

tmj010

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