Java Collection Tutorial - Java TreeSet.first()

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Syntax

TreeSet.first() has the following syntax.

public E first()

Example

In the following code shows how to use TreeSet.first() method.

/*from w  w  w . j  ava  2s . c o  m*/
import java.util.TreeSet;

public class Main {
   public static void main(String[] args) {
     
     TreeSet <Integer> treeadd = new TreeSet<Integer> ();
     
     treeadd.add(12);
     treeadd.add(11);
     treeadd.add(16);
     treeadd.add(15);
     
     // getting the first lowset element
     System.out.println("First lowest element: "+treeadd.first());   
   }    
}

The code above generates the following result.

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