Java目录

Java 8
Stream API, Optional API, 跟CompletableFuture

lang3
EqualsBuilder
ToStringBuilder

Google Guava (Google Collections Library)
ImmutableSet.of
ImmutableMap.of

Java的Null pointer exception
Java中的ThreadLocal和弱引用

ORM：
lombok

Database ORM:
MyBatis

JSON：
fasterxml

Build tool:
Gradle简介