Question

I have a String[][] type array, like this,

static final String arrChildelements[][] = {
    { "1", "2", "3"..... },
    { "A", "B", "C"..... },
    { "X", "Y", "Z"..... } };

Here the number of rows is fixed i.e. 3. Now I want to store this Array in some other Array of the same type. What I have done so far is,

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < secondColumnLength; j++) { 
           //Here I have no idea that how to get the number of elements for the column
            arrChild[i][j] = arrChildelements[i][j];
        }
    }

So far, I can only remember this method to iterate through the String[][] array. Though I would love to know if there is any other good way to accomplish this.

Answer 1

Instead of iterating over each member of an array, instead use System.arraycopy():

System.arraycopy(arrChildElements, 0, arrChild, 0, arrChildElements.length);

Additionally, if you must iterate over each value, arrChildElements.length is your outer loop value, and arrChildElements[i].length is your inner loop value.