public
Map.Entry<K,V> firstEntry()
Returns
a key-value mapping associated with the least key in this map, or
null if the map is empty.
import java.util.*; class TreeMapFirstEntry{ public static void main(String args[]){ TreeMap<Integer, String> myMap; Map.Entry<Integer, String> firstEntry; myMap = new TreeMap<> (); /* Add Data to myMap */ myMap.put(1, "a"); myMap.put(2, "ab"); myMap.put(3, "abc"); myMap.put(4, "abcd"); firstEntry = myMap.firstEntry(); System.out.println("Elements in myMap are"); System.out.println(myMap); System.out.println("First Entry in myMap is"); System.out.println(firstEntry); } }
Output
Elements in myMap are {1=a, 2=ab, 3=abc, 4=abcd} First Entry in myMap is 1=a
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