@ankurm

Ankur in Java

Overview of New Features in Java 19

Java 19 has just been released — September 20, 2022 — as a short-term support release on the six-month cadence the Java platform moved to starting with Java 9. It is not an LTS release, but that does not make it uninteresting: Java 19 ships 7 JEPs, several of them highly anticipated by the Java community. Virtual Threads, in particular, represent one of the most significant changes to the Java concurrency model in years. The headline features span concurrency, pattern matching, native interop, and platform reach. Three features arrive as preview (complete but seeking feedback), one as an incubator module (early-stage API), and the rest are fully stable additions. Because several require flags to enable, we will also cover exactly how to turn them on — both on the command line and in Maven. This article walks through each major Java 19 feature with code examples and explains the preview and incubator status so you know what you can try today and what to expect in future releases.

Ankur in Snippets

Git Add . (All)

git add . stages all changes in the current directory and everything below it — modified files, new files, and deleted files — in a single command. It's the fastest way to prepare everything for a commit when you want the full working-directory state captured. This is the fourth post in this site's Git command guide, following Git Add.

Ankur in Snippets

Git Push

git push uploads local commits to a remote repository. This guide covers upstream tracking with -u, --force vs --force-with-lease, and how to resolve a real rejected-push error.

Ankur in Snippets

Git Pull

git pull fetches and merges remote changes. This guide covers the divergent branches reconciliation warning, setting pull.rebase and pull.ff, and a merge-vs-rebase comparison table.

Ankur in Snippets

Git Checkout

git checkout switches branches and restores files. This guide covers detached HEAD state and the checkout vs switch vs restore split introduced in Git 2.23, with a side-by-side comparison table.

Ankur in Snippets

Git Branch

git branch lists, creates, renames, and deletes branches. This guide covers renaming master to main with -m, the difference between -d and -D, and a reference table of common flags.

Ankur in Snippets

Git Log

git log displays commit history. This guide covers --oneline --graph --all for compact history, git log -p for diffs, filtering by author and date, and a flag reference table.

Ankur in Snippets

Git Status

git status shows modified, staged, and untracked files in your repository. This guide covers the short format (-s), how .gitignore interacts with status output, and a full status-code reference table.

Ankur in Snippets

Git Commit

git commit saves your staged changes to the local repository as a permanent snapshot. It creates a new commit object with a unique identifier based on the changes made, along with a message that describes them. This is the fifth post in this site's Git command guide, following Git Add . (All).

Ankur in Snippets

Git Add

git add is the command that stages changes from your working directory into Git's index, marking them to be included in the next commit. Staging is an intermediate step that gives you precise control — you can add one file at a time, leaving other modified files unstaged until a later commit. This is the third post in this site's Git command guide, following Git Clone.