what does mean Marshalling in java code example

Example 1: what is marshalling and unmarshalling in java

Marshalling; when we MAP a Java object to API JSON
format (CONVERT JAVA OBJECT TO JSON);

Unmarshalling; API JSON/XML ^ MAP it to Java Object
(JSON TO JAVA OBJECT)

Example 2: unmarshalling in java

umharshalling also know as
Deserialization;
API JSON/XML ^ MAP it to Java Object
(JSON TO JAVA OBJECT)