addButton = bf.createJButton("AddButton");
constraints.setGridBounds(1, 0, 1, 1);
add(addButton, constraints);
removeButton = bf.createJButton("RemoveButton");
constraints.setGridBounds(1, 1, 1, 1);
add(removeButton, constraints);
clearButton = bf.createJButton("ClearButton");
constraints.setGridBounds(1, 2, 1, 1);