I need help solving this practice problem:

I need to make a method to find the col index of the minimum value in a specified row of a given a 2D array.Return -1 if an invalid row value is specified. You may test your code with the Test2DArr.java given in this unit.

Here is what I have, but I'm getting an ArrayIndexOutOfBoundsException on the for loop on the findRowOfColMax method. I'm missing something, & I cannot see it.

public class Practice {

public static void main(String[] args) {

int[][] arr2d = {{2,3,5,70},{2,3,5,99},{3,5,6,72}};

System.out.println("Array contents:");

display(arr2d);

int results = findRowOfColMax(arr2d, arr2d.length);

System.out.println("The index of the row with the max number is: " + results);

}

//*********************************************************************

public static void display(int[][] arr2d) {

for(int row=0; row

for(int col=0; col

System.out.printf("%4d", arr2d[row][col]);

} // end col loop

System.out.println();

} // end row loop

} // end method

//*********************************************************************

public static int findRowOfColMax(int[][] arr2d, int col) {

if(arr2d.length == 0 || col < 0 || arr2d[0].length < col) {

return -1;

}

else {

int index = 0;

for(int i=1; i

if(arr2d[index][col] < arr2d[i][col]) {

index = i;

}

}

return index;

}

} // end findRowOfColMax

}