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2013techsmarts/Non-Empty Immutable Map

Last active February 15, 2017 17:24
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Demonstration of Immutable Map
Raw
Non-Empty Immutable Map
jshell> Map immutableMap = Map.of(1,"Smart",2,"Techie");
immutableMap ==> {1=Smart, 2=Techie}
//Get item from Map
jshell> immutableMap.get(1);
$2 ==> "Smart"
//Add item to map
jshell> immutableMap.put(3,"Smart_1");
| Warning:
| unchecked call to put(K,V) as a member of the raw type java.util.Map
| immutableMap.put(3,"Smart_1");
| ^---------------------------^
| java.lang.UnsupportedOperationException thrown:
| at ImmutableCollections.uoe (ImmutableCollections.java:70)
| at ImmutableCollections$AbstractImmutableMap.put (ImmutableCollections.java:557)
| at (#3:1)
jshell>
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