Hutool 3.9 [repack] (2025)

// Chainable: watch specific file pattern public WatchBuilder onFiles(String globPattern, FileHandler handler) patternHandlers.put(globPattern, handler); return this;

was a historical release in the lifecycle of the Hutool project, a popular open-source Java tool library designed to reduce the cost of learning APIs and increase productivity by providing simple static methods for common tasks. Project Philosophy Hutool 3.9

Handles basic tasks like StrUtil (string handling), ClassUtil (reflection), and ArrayUtil . FileHandler handler) patternHandlers.put(globPattern

: A thin wrapper over JDBC that makes database operations feel more like using an ORM without the overhead. Notable Features of Version 3.9 1. Enhanced Date Handling ( DateUtil ) Hutool 3.9

// Check port availability boolean isOpen = NetUtil.isUsableLocalPort(8080);