Nov 1, 2012 · Introduce a class variable/property/... with the current color of the circle. Override the paintComponent() method and make it draw a circle in the color, which you can read from …

Feb 27, 2025 · Event handling is a mechanism that allows programs to control events and define what should happen when an event occurs. Java uses the Delegation Event Model to handle …

To illustrate Java event handling, we’ll look at a simple, but typical GUI interface to a graphic application. StringArt.java. Compiled version of this program. 1 Build 1: The “manual” build. …

The main event-handling method -- the one that's called (by default) whenever any event occurs -- is handleEvent(). The Component class also defines some convenience methods for handling …

Learn how to draw graphics on the screen in Java with this expert guide, including examples, code snippets, and common pitfalls.

In Java, the graphical user interface toolkit provides an event queue to handle screen events such as mouse clicking and button pressing. That event queue is fairly well hidden under the …

The Container class defines several methods, such as processKeyEvent and processMouseEvent, for handling particular types of events, and then one catch-all method …

Dec 11, 2024 · The goal of this program is to create a basic drawing application that allows users to draw freehand on a canvas using a mouse. This will introduce you to the concepts of …

The Component class defines several methods, such as action and mouseDown, for handling particular types of events, and then one catch-all method called handleEvent. To react to an …

Feb 6, 2014 · Simply lay a transparent Window over the screen and draw onto it. Transparent Windows even support click-through so the effect is like if you were drawing over the screen …