how to fill arraylist with loops code example

Example 1: remove arraylist index in for loop

for (int i = data.size()-1; i >= 0; i--){
    if (data.get(i).contains(element)){
            data.remove(i);
    }
 }

Example 2: how to fill a 2d array in java

int rows = 5, column = 7;
int[][] arr = new int[rows][column]; 
   
   //2D arrays are row major, so always row first
   
for (int row = 0; row < arr.length; row++)
{
	for (int col = 0; col < arr[row].length; col++)
    {
    	arr[row][col] = 5; //Whatever value you want to set them to
    }
}