get first element of hashset java code example

Example 1: how to get first element from hashset in java

Collection c;

Iterator iter = c.iterator();

Object first = iter.next();

Example 2: get first entry in set java

Set<Long> set = new LinkedHashSet<>();
set.iterator().next();
// LinkedHashSet guarantees insertion order

Example 3: java list get first element

list.get(0);

Example 4: java list get first element

!list_or_set.isEmpty()