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
How Datadog Cut the Size of Its Agent Go Binaries by 77%
After the Datadog Agent grew from 428 MiB to 1.22 GiB over a period of 5 years, Datadog engineers set out to reduce its binary size. They discovered that most Go binary bloat comes from hidden dependencies, disabled linker optimizations, and subtle behaviors in the Go compiler and linker.
By Sergio De SimoneGitLab Suggests AI Can Detect Vulnerabilities But it's AI Governance that Determines Risk
Artificial intelligence is rapidly transforming how software vulnerabilities are detected, but questions about who governs the risks AI exposes, and how those risks are acted on, are becoming increasingly urgent, according to a new blog post by GitLab.
By Craig RisiCloudflare Releases Experimental Next.js Alternative Built With AI Assistance
Cloudflare released vinext, an experimental Next.js reimplementation built on Vite by one engineer, with AI guidance over one week, for $1,100. Early benchmarks show 4.4x faster builds, but Cloudflare cautions it's untested at scale. Missing static pre-rendering. HN reaction skeptical, noting Vite does the heavy lifting. Already running on CIO.gov despite experimental status.
By Steef-Jan WiggersNetflix Automates RDS PostgreSQL to Aurora PostgreSQL Migration Across 400 Production Clusters
Netflix engineers describe an internal automation platform that migrates nearly 400 RDS PostgreSQL clusters to Aurora, reducing downtime and operational risk. The platform coordinates replication, CDC handling, controlled cutover, and rollback, while supporting service teams in a self-service migration workflow.
By Leela KumiliPresentation: 4 Patterns of AI Native Development
Patrick Debois discusses the evolution of software engineering in the age of AI. He shares four key patterns: transitioning from producer to manager, focusing on intent over implementation through spec-driven development, moving from delivery to discovery, and managing agentic knowledge. He explains how these shifts redefine seniority, team roles, and the future of the DevOps workflow.
By Patrick Debois
© 2026 Created by Michael Levin.
Powered by
