Get the length of column for each row in 2d array

Question

let say if i declared a 2d array
int [][]set = new int[5][5];
if i had finished storing datas in the 2d array like the following
Columns
row 0[10][10][10][10][10]
row 1[20][][][][]
row 2[15][25][30][][]
row 3[17][12][][][]
row 4[10][][][][]
how do we know the the length of each row of the datas?
for example row 0 had 5 column data , row 1 got 1 col data, row 3 got 3 columns of data..
is it possible?
as what i know int set[1].length() = 5 and is not 1... am i right?

Answer 1

as what i know int set[1].length() = 5 and is not
1... am i right?No, there is no parenthesis for the array property length
Lets suppose you create this 2-D array;-
int [][]array = {{1,2,3,4},
{5,6,7,8},
{10,11,12,13},
{15,16,17,18} };
EG:-
This is array[0][0]= 1;
This is array[1][0]= 5;
This is array[2][2]= 12;
This is array[3][1]= 16;
int first = array[0].length; // will initialise 'first' to a value of 4