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CopyOnWriteArraySet size() method in Java

Last Updated : 11 Jul, 2025
The size() method of CopyOnWriteArraySet returns the size of the Set. It returns the number of elements in the current Set. Syntax: 
public int size()
Return Value: The function returns the number of elements in the current Set. Below programs illustrate the above function: Program 1:
Output: 
CopyOnWriteArraySet: []
size of ArrSet: 0
CopyOnWriteArraySet: [32, 67, 98, 100]
size of ArrSet: 4
Program 2:
Output: 
CopyOnWriteArraySet: [gopal, gfg, jgec, sudo]
size of ArrSet: 4
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArraySet.html#size--
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