• Convert List to Arrays and Array to ArrayList

Zip/Unzip

• Compress files to zip file
• Decompress/Unzip files from zip file.

JSON

• Convert JSON to Java and Java to JSON
• Convert JSON data to ArrayList
• Create dynamic JSON by Jacson API
• Map JSON to Java Object by Annotation?
• Retrieve key Information from JSON Data

GSON

• Convert Java object to / from JSON by (GSON)
• JSON pretty formatting and Null Serialization (GSON/GsonBuilder)
• Exclude fields from JSON while parsing by GSON/GsonBuilder?