Java TreeSet.pollFirst()
Syntax
TreeSet.pollFirst() has the following syntax.
public E pollFirst()
Example
In the following code shows how to use TreeSet.pollFirst() method.
// ww w .j ava2s .c o m
import java.util.Iterator;
import java.util.TreeSet;
public class Main {
public static void main(String[] args) {
TreeSet<Integer> treeadd = new TreeSet<Integer> ();
treeadd.add(1);
treeadd.add(3);
treeadd.add(17);
treeadd.add(2);
System.out.println("First element is: "+treeadd.pollFirst());
Iterator<Integer> iterator = treeadd.iterator();
while (iterator.hasNext()){
System.out.println(iterator.next());
}
}
}
The code above generates the following result.
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