What is Map Interface in Java? | Java Map Interface (Java Tutorial)
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******************** What is Java Map?
A map contains values on the basis of key
Each key and value pair is known as an entry
A map contains only unique keys
Map Interface methods in Java:
Object put(Object key, Object targetObject) - It inserts the targetObject at the specified position(key).
void putAll(Map sourceMap) - It copies all the key/value pairs from the sourceMap to the targetMap.
Object remove(Object key) - It removes the element at the specified position(key).
Object get(Object key) - It returns the value at the specified position(key).
boolean containsKey(Object key) - It returns true if the specified key is present else it returns false.
int size() - It returns the total key/value pairs count of the map.
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