Java - Garbage collectors

1. Serial
-XX:+UseSerialGC JVM

2. Parallel
default

3. CMS(Current Markup Sweep)
-XX:+USeParNewGC

4. G1
–XX:+UseG1GC

Note: Java8 and G1 collector can optimize the string intern with the following option
-XX:+UseStringDeduplicationJVM

More information regarding G1:
https://www.infoq.com/articles/G1-One-Garbage-Collector-To-Rule-Them-All