1. Write a program that allows you to enter a 6-digit PIN, like you would on your smartphone to unlock it. done in java using GUI. It should have the following layout:
[ DISPLAY PIN AS TYPED ] [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ < ] [ 0 ] Where [ < ] is a "backspace" button. The display should show the PIN as it is typed, and when the user enters the PIN 202113, the display changes to "YOU MAY ENTER!"
b. For the above program you wrote above, add a new feature. This could be to allow variable length PINs, match different PINs, allow users to select a PIN and then confirm it later, etc.
Describe your extension.
c. Add a feature were you listen for key strokes, like ‘1’ or ‘2’ for entering the PIN, and allow the user to either type or use the mouse
d. Add a secret PIN that get’s checked. If the user guesses the PIN, have your GUI change in some interesting way, such as change colors, or something else visual

A graphical user interface (GUI) is a user interface that lets users interact with electronic devices like computers and smartphones by using menus, icons, and other visual cues (graphics). In contrast to text-based interfaces, which only display data and commands as text, GUIs graphically display information and related user controls. A mouse, trackball, stylus, or a finger on a touch screen are all pointing devices that can be used to interact with GUI representations.

The first keyboard input and what is known as a prompt were used in the first human-computer text interface (or DOS prompt). At the DOS prompt, commands were entered to start a computer's responses. An awkward and ineffective user interface was produced by the use of these commands and the requirement for precise spelling.

Learn more about GUI

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