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Explore 100 practical Java code snippets in this 58-minute conference talk from Devoxx that demonstrates powerful Java techniques without external dependencies. Learn to run Java applications without compilation, print emojis programmatically, launch HTTP development servers, and invoke native libraries with ease. Master the programmatic use of Java Compiler (javac) and Java Archive (JAR) tools while implementing essential patterns like LRU caches and file watchers. Discover how to create colorful console logs, perform date and time manipulations, build smart enums, and parse files efficiently using only plain Java. The presentation focuses on practical, immediately applicable code examples that showcase Java's built-in capabilities without requiring Maven, complex builds, or external libraries, making it perfect for developers who want to maximize their use of core Java features.