This document describes how to implement ArrayList in a block coding manner.

• Index

▶Definition of ArrayList

• ArrayList is a data structure that uses continuous memory space to have data.

▶ArrayList Block

• Introduces the blocks entered the ArrayList category of SyncTree NBlock.

1) ArrayList

• Used to create (declare) an ArrayList data structure.

• In Values, various values are put in depending on the data type or data structure (HashMap, Array, etc.)
• Click the ⚙️ button to add or remove Value items.

• Below is an example of the ArrayList block declaration.

2) Get Array Variable