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Java Collections emptyMap() Method

The emptyMap() method of Java Collections class returns an empty map which is immutable.

Syntax

Following is the declaration of emptyMap() method:

Parameter

This method does not accept any parameter.

Returns

The emptyMap() method returns an empty immutable Map.

Exceptions

NA

Compatibility Version

Java 1.5 and above

Example 1

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Output:

Created Empty Map: {}

Example 2

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Output:

Created Empty Map: {}
Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.AbstractMap.put(AbstractMap.java:209)
	at myPackage.CollectionsEmptyMapExample2.main(CollectionsEmptyMapExample2.java:9)

Example 3

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Output:

Exception in thread "main" java.lang.UnsupportedOperationException
	at java.base/java.util.AbstractMap.put(AbstractMap.java:209)
	at myPackage.CollectionsEmptyMapExample3.main(CollectionsEmptyMapExample3.java:7)





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