hashmap java contains code example

Example 1: check if map contains key java

if (map.containsKey(key)) {
       // Okay, there's a key but the value is null
    } else {
       // Definitely no such key
    }

Example 2: hashset contains java

HashSet<Integer> set = new HashSet<Integer>();      
set.contains(110)//public boolean contains(Object o)

Example 3: hashmap contains in java

Hash_Map.containsKey(key_element)