Hello Java!

Examples for learning Java.

Modules

• hello-actuator - usage of spring boot actuator
• hello-arrays-aslist - usage of java Arrays.asList()
• hello-assert - usage of java assert
• hello-autoboxing - java autoboxing
• hello-chinese-calendar - conversion between solar calendar and lunar calendar
• hello-command-line-runner - spring CommandLineRunner and @Order
• hello-commons-cli - usage of apache commons-cli
• hello-configuration - test @Configuration and @TestConfiguration
• hello-constant-interface - Constant Interface Anti-Pattern is evil
• hello-cpu-num - how to get cpu number
• hello-deadlock - emulate deadlock
• hello-digest-utils - usage of spring DigestUtils
• hello-docker - how to package docker image
• hello-enum - usage of java enum type
• hello-exception - how uncaught exception propagates
• hello-executors - usage of java Executors
• hello-float - detail of java float 0.0f, -0.0f, Float.NaN, Float.INFINITY
• hello-guava - usage of google guava library
• hello-interface-default-method - default method in interface
• hello-io - some io features
• hello-ip-hostname - get all IPs and hostnames of current machine
• hello-jce-policy - oracle jce policy test
• hello-lombok - usage of lombok, including @Getter, @Setter, types of @Constructor, etc
• hello-math - simple math
• hello-memory-leak - emulate memory leak
• hello-mockito - usage of mockito and powermock
• hello-output-capture - use spring OutputCapture to test stdout and stderr
• hello-override - detail of java method override
• hello-reference - java StrongReference, SoftReference, WeakReference, PhantomReference
• hello-regex - java regex Pattern
• hello-resource-path - get file path in classpath
• hello-retry - usage of spring retry
• hello-runtime-version - usage of java.lang.Runtime.Version in Java 9
• hello-schedule - spring @EnableScheduling and @Scheduled
• hello-sqlite - usage of sqlite
• hello-sshj - usage of SSHJ
• hello-string - detail of java string and string pool
• hello-thread-stop - comparion of stopping thread
• hello-tomcat-dir - tomcat embedded default work dir
• hello-varargs - varargs ...
• hello-xml - usage of dom4j