Reimplement Exercise •• E10.13 where the grid is unbounded. The constructor has no arguments, and the row and column parameter variables of the add and getDescription methods can be arbitrary integers.

Data from Exercise E10.13

Implement a class Grid that stores measurements in a rectangular grid. The grid has a given number of rows and columns, and a description string can be added for any grid location. Supply the following constructor and methods:

public Grid (int numRows, int numColumns) public void add (int row, int column, String description) public String getDescription (int row, int column) public ArrayList getDescribed Locations() Here, Location is an inner class that encapsulates the row and the column of a grid location.