Using Java Program (hard coded, no toolbox drag/drop)

(please use comments to help explain code)

Program 1 (Labels, Buttons, Text Fields): Create a simple windows calculator in Java. It should have a labeled text field for the user to provide input (where they enter the numbers), as well as an Add, Subtract, and Clear buttons. There should be a label or disabled text field for output. Add event handling to the buttons to add the value the user enters to the current total, subtract the value entered from the current total, and clear the current total. Additional Instruction: You cannot use a toolbox for this one and drag the controls over (from a Swing Frame Project created in Netbeans.) You have to create these controls, add them to the Frame, and set up the listeners/event handlers entirely in code to demonstrate how to do it.