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Java Collections nCopies() Method

The nCopies() method of Java Collections class is used to get an immutable list consisting of n copies of the specified object.

Syntax

Following is the declaration of nCopies() method:

Parameter

Parameter Description Required/Optional
n It is the number of elements in the returned list. Required
o It is the element to appear repetedly in the returned list. Required

Returns

The nCopies() method returns an immutable list consisting of n copies of the specified object.

Exceptions

IllegalArgumentException- It throws this exception if the number of elements is less then zero i.e. n < 0.

Compatibility Version

Java 1.4 and above

Example 1

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Output:

Output: [JavaTpoint, JavaTpoint, JavaTpoint]

Example 2

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Output:

Output of Atomic Integer are:
[0, 0, 0]
[1, 1, 1]

Example 3

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Output:

List elements: 
SSSIT.COM
SSSIT.COM
SSSIT.COM
SSSIT.COM
SSSIT.COM





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