Codetown
Codetown ::: a software developer's community
Dual Monitors and the repaint() in JAVA?
Hello all, I am “very” new to Java and fairly new to programming in general. I have been reading the “Head First Java” book and while doing one of the examples came across an observation. I created a colored circle and a button when you click the button the circle changes to a random color with the repaint() method. I have dual monitors set up and what I noticed was that If I were to drag the window to the second monitor it fires the repaint() method. Can anyone explain why this happens? I know this is probably something as a new programmer I don’t need to know right now but it did intrigue me so I thought I would ask.
Views: 67
Happy 10th year, JCertif!
Notes
Welcome to Codetown!
Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.
Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.
Looking for Jobs or Staff?
Check out the Codetown Jobs group.
InfoQ Reading List
Anthropic’s Designs Three-Agent Harness Supports Long-Running Full-Stack AI Development
Anthropic introduces a three-agent harness separating planning, generation, and evaluation to improve long-running autonomous AI workflows for frontend and full-stack development. Industry commentary highlights structured approaches, iterative evaluation, and practical methods to maintain coherence and quality over multi-hour AI coding sessions.
By Leela KumiliTigerFS Mounts PostgreSQL Databases as a Filesystem for Developers and AI Agents
TigerFS is a new experimental filesystem that mounts a database as a directory and stores files directly in PostgreSQL. The open source project exposes database data through a standard filesystem interface, allowing developers and AI agents to interact with it using common Unix tools such as ls, cat, find, and grep, rather than via APIs or SDKs.
By Renato LosioSwift 6.3 Stabilizes Android SDK, Extends C Interop, and More
Swift 6.3 advances Swift cross-platform story with official Android support, improves significantly C interoperability through the new @c attribute, and continues extending embedded programming support. It also strengthens the ecosystem with a unified build system direction and gives developers more low-level performance control.
By Sergio De SimoneOpen Source Security Tool Trivy Hit by Supply Chain Attack, Prompting Urgent Industry Response
A major security incident affecting the widely used open source vulnerability scanner Trivy has exposed critical weaknesses in software supply chain security, after maintainers confirmed that a malicious release was briefly distributed to users.
By Craig RisiModule Federation 2.0 Reaches Stable Release with Wider Support Outside of Webpack
Module Federation 2.0, an open-source micro-frontend mechanism introduced with webpack 5, offers significant updates including dynamic TypeScript type hints, decoupled runtime layers, and Node.js support. It enhances compatibility across various bundlers and frameworks. Key features include a Side Effect Scanner and easier integration for remote modules, addressing previous adoption challenges.
By Daniel Curtis
© 2026 Created by Michael Levin.
Powered by
