Multidimensional Arrays lengths in Java

Question

How to find the lengths of a multidimensional array with non equal indices?

For example, I have int[][] pathList = new int[6][4]

Without actuall

Answer 1

Java has "jagged" multidimensional arrays, which means that each "row" in your two-dimensional array can have a different number of components. If you can assume that each row has the same number of components, use:

pathList[0].length;

Otherwise, you will have to iterate:

int maxRowLength = 0;
for (int i = 0; i < pathList.length; i++) {
    if (maxRowLength < pathList[i].length) {
        maxRowLength = pathList[i].length;
    }
}