TreeMap size() Method in Java with Examples

size() method of TreeMap class is used to get the size of the map which refers to the number of the key-value pair or mappings in the Map.

--> java.util package
 --> TreeMap class
 --> size() Method 

Syntax: 

Tree_Map.size()

Return Value: The size of the map which also means the number of key-value pairs present in the map. 

Example 1: Mapping String Values to Integer Keys

Initial Mappings are: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You}
The size of the map is 5

Example 2: Mapping Integer Values to String Keys

Initial Mappings are: {4=15, Geeks=20, Welcomes=25, You=30}
The size of the map is 4

Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.