関連ワード:  get length of 2d array in java    find length of 2d array in java    get size of 2d array in java    get length of 2d array javascript    find size of 2d array in java    get dimensions of 2d array java    get length of multidimensional array java    check length of 2d array java    get size of 2 dimensional array java    how to get length of multidimensional array in javascript