Groovy for Java developers
summary
Groovy compiles to JVM bytecode and runs with the Groovy jar and Groovy JDK; demos show the Groovy Console, gvm, and the web console used for live code. Examples include mapping 0..9 to powers of two with a one‑line collect versus a Java loop, a text analyzer that counts chars/words and emits XML via MarkupBuilder, pulling Maven deps with @Grab to use groovy-wslite and JsonBuilder, embedding scripts via GroovyShell to run a trades.groovy DSL, and microbenchmarks where Java sorts 10k in ~46ms, Groovy 143ms, and @CompileStatic ~16ms (1M: Java ~200ms, Groovy ~2s, @CompileStatic ~200ms).
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chapters (10)
- 0:00Introduction
- 1:44Background and setup
- 3:36Tooling and installation
- 6:37Groovy language basics
- 16:04Scripting with Groovy
- 27:10Using libraries and REST
- 34:30Testing with Spock
- 1:00:14Runtime script integration
- 1:06:21Performance and compilation
- 1:18:51Conclusion
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