Can anyone explain why this code not executing

Question

public class Program {
public static void main(String[] args) {
int [][] myarr ={{1,2,3},{4},{6,7,8}};
myarr[1][1] = 5;
int x = myarr[1][1];
System.out.println(x);
}
}

Answer 1

@Torsten is correct if your trying to change the 4 to 5 in the array then you need myarr[1][0] = 5;
int x = myarr[1][0];
System.out.println(x);

Answer 2

@lambor exactly you cant increase the size of the array once its been declared you would have to create a new array at a larger size and copy all existing values over

Answer 3

@ Lambor yep here you go..

https://code.sololearn.com/c9pLwXYRRzcb/?ref=app

Answer 4

I guess, because you are trying to access an array field that does not exist. Remember, index starts at 0.

Answer 5

okkk. now I got that. Once we done initializing an array it's fixed.
in the middle of the program we can't insert the value to array. tnq

Answer 6

@D_Stark can you create a code for that? for example

Answer 7

you are really amazing bro. now I understood clearly

Answer 8

there is no [1][1]
didn't u read postes?!

Answer 9

@Torsten good point
@lambor read the "multidimensional arrays". lesson....

Answer 10

actually I need to insert 5 on [1][1]

Answer 11

arrays are fixed size..... meaning that once u create the array int [][] myarr ={{1,2,3},{4},{6,7,8}};
you only can change the value of existing index's and u can't add a new index(a new slot or place holder) in the array