StringJoiner merge() method in Java
The merge(StringJoiner other) of StringJoiner adds the contents of the given StringJoiner without prefix and suffix as the next element if it is non-empty. If the given StringJoiner is empty, the call has no effect.
public StringJoiner merge(StringJoiner other)
Parameters: This method accepts a mandatory parameter other which is the StringJoiner whose contents should be merged into this one
Returns: This method returns this StringJoiner
Exception: This method throws NullPointerException if the other StringJoiner is null
Below programs illustrate the merge() method:
Example 1: To demonstrate merge() with delimiter ” ”
StringJoiner 1: Geeks for Geeks StringJoiner 2: A Computer Portal Merged StringJoiner : Geeks for Geeks A Computer Portal
Example 2: To demonstrate merge() with delimeter “, ”
StringJoiner 1: Geeks, for, Geeks StringJoiner 2: A, Computer, Portal Merged StringJoiner : Geeks, for, Geeks, A, Computer, Portal
Example 3: To demonstrate NullPointerException
StringJoiner 1: Geeks, for, Geeks StringJoiner 2: null Exception during merge: java.lang.NullPointerException
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