java set get first element code example

Example 1: get first entry in set java

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

Example 2: java list get first element

list.get(0);

Example 3: java list get first element

!list_or_set.isEmpty()

Example 4: how to find first value of an list

// Python
list = [1,2,3]
firstdigit = list[0] // 1 

list = ['Hello', 'bye', 'Adios']
firstvalue = list[0] // 'Hello'