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java.lang.everything
everything.tooling

tools and ecosystem

the JDK's own tools, modules, build tools, testing, and the libraries everyone uses.

start part 12
  1. 01the jdk toolboxjavac, jar, javap, jdeps, jcmd, jdb. what's in bin/ and why.
  2. 02modulesmodule-info.java, requires, exports, opens. strong encapsulation.
  3. 03classpath to module pathunnamed modules, automatic modules, and migrating for real.
  4. 04jar, jlink, jpackagefrom a jar to a tiny custom runtime to a native installer.
  5. 05maventhe pom, the lifecycle, and how dependency conflicts get resolved.
  6. 06gradletasks, the task graph, and the kotlin dsl.
  7. 07testing with junitjunit 6, assertions, parameterized tests, mocks and testcontainers.
  8. 08code quality toolserror prone, spotbugs, nullaway and jspecify.
  9. 09javadocdoc comments, @snippet, and markdown docs.
  10. 10the ecosystem mapspring, quarkus, micronaut, jakarta ee, kotlin. who does what.