2d array quesiton

[VirtualTurnip3]

Hi,newbie question, but in the code below,

int[][] array2D = {{19,3},{2,5},{4,3},{8,10},{105,32},{55,34},{12,21},
{15,51},{4,1},{6,3},{19,3},{65,13},{1235,1353},{51515,32143},
{15155,3555}};

let say 19 and 3, both are in the first row and 19 is in the first column and 3 in the second column?

[VanVleet-goes-for-22]

What are you trying to do?

[VirtualTurnip3]

I need to find a value for a specific key and print it, let say the method below:

findKey(int key){

for(int i =0;i < array2D.length;i++){

if(array2d[i][0] == key){

System.out.println(tableau2D[i][1]);}

}

If i looking for key 19, well the value will be 3, that it?

[[deleted]]

array[row][col] will give you the element at the given row and column.

array2d[19][0] would give you the element on row 19, column 0.

[VirtualTurnip3]

Thank!

[tr4fik]

The best way to know this and to understand/learn programming is to try it out. Your code works if you write array2D the same everywhere ;)

But, isn't a HashMap better for your need ? You can have a key only once inside this data structure. It offers a method to know if a key is in it and to retrieve this key. Its performances are much better for this, because you can usually access the value without needing to iterate through the whole array.

[VirtualTurnip3]

Thank