CSC1020 Homework 3

Overview

Using JavaFX, write a simple calculator program that looks something like this:

Details

• The program will display the result of adding two integers together when the equals button is clicked.
• The user cannot modify the answer text field
• The background color of the result text field is red if the result is negative, otherwise the background should be light grey, as shown above and below.
• Hitting enter when in either of the operand text fields should also add the numbers together.
• If either of the operand text fields are empty, nothing should happen.
• Exception handling should print a useful message to the console.

Formatting

• For organizing your Scene, try creating an HBox object and put the upper row of components in the HBox, in the order they will appear.
• Create a VBox object and put the HBox object and the answer TextField in that
• Use the VBox as the main container for your Scene.
• It will look something like this:

HBox innerPane = new HBox();
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innerPane.getChildren().addAll(firstOperand, operator, secondOperand, equals);
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VBox pane = new VBox();
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pane.getChildren().addAll(innerPane, result);

• Play around with the padding and spacing of the VBox and HBox to line it up the way you would like it
• Below are links to some useful javadoc pages

VBox

HBox

TextField