Java Spliterator tryAdvance() Method

The tryAdvance() is a method of Java Interface Spliterator which is used to get the existing elements upon performing the specified action on it.

Syntax

Following is the declaration of tryAdvance() method-

Parameter

Parameter	Description	Required/Optional
action	It is the action for checking elements.	Required

Return

The tryAdvance() method returns true if there is a next element present upon entry to this method, otherwise returns false.

Exceptions

NullPointerException- This method has thrown an exception if the specified action is null.

Compatibility Version

Java 1.8 and above

Example 1

import java.util.*;
public class InterfaceSpliteratorTryAdvanceExample1 {  
     public static void main(String args[]){
    	 List<String> list = Arrays.asList("Jasmine", "Rose", "Lotus");
    	 Spliterator<String> splitr = list.spliterator();
       //Use tryAdvance() to display(action) elements of list.
    	 boolean b1 = splitr.tryAdvance(System.out::println);
    	 System.out.println("Element exists: "+b1);
    	 System.out.println(" --- bulk traversal");
    	 splitr.forEachRemaining(System.out::println);
    	 System.out.println(" --Attempting tryAdvance again--");
    	 boolean b2 = splitr.tryAdvance(System.out::println);
    	 System.out.println("Element exists: "+b2);
       }
}

Output:

Jasmine
Element exists: true
 --- bulk traversal
Rose
Lotus
 --Attempting tryAdvance again--
Element exists: false

Example 2

import java.util.*;
public class InterfaceSpliteratorTryAdvanceExample2 {  
     public static void main(String args[]){
    	 List<String> nameList = Arrays.asList("Rahul", "Abhi", "Suresh", "Rani", "Nikki", "Rosy", "Prem");
    	 Spliterator<String> splitr = nameList.spliterator();
    	 while(splitr.tryAdvance((n) -> System.out.println("Name: " + n)));
       }
}

Output:

Name: Rahul
Name: Abhi
Name: Suresh
Name: Rani
Name: Nikki
Name: Rosy
Name: Prem

Example 3

import java.util.*;
public class InterfaceSpliteratorTryAdvanceExample3 {  
     public static void main(String args[]){
    	 //Create an array list
         ArrayList<Integer> al1 = new ArrayList<>();             
         //Add values in the list.
         al1.add(1);
         al1.add(2);
         al1.add(3);
         al1.add(4);
         al1.add(5);                                               
         //Getting Spliterator object
         Spliterator<Integer> splitr = al1.spliterator();                      
         //Use tryAdvance() to display(action) elements of arraylist.              
         System.out.println("Elements of arraylist: ");     
         while(splitr.tryAdvance((n) -> System.out.println(n)));
         }
}

Output: