How To Loop Arraylist Inward Coffee - Listing Itrator Traversal Code Example

Looping ArrayList inward Java or Iteration over ArrayList is really like to looping Map inward Java. In club to loop ArrayList inward Java nosotros tin purpose either foreach loop, elementary for loop or Java Iterator from ArrayList. We convey already touched iterating ArrayList inward 10 Example of ArrayList inward Java together with nosotros volition meet hither inward detail. We are going to meet examples of all iii approaches inward this ArrayList tutorial together with discovery out which 1 is build clean together with best method of looping arraylist inward Java. Before start writing an instance for loop inward ArrayList let's intend why create nosotros involve to iterate, traverse or loop an ArrayList if it’s based on index together with backed past times Array. If nosotros know the index of chemical ingredient than nosotros tin straight teach that especial chemical ingredient from ArrayList exactly if you lot desire to impress all elements of arraylist together with create or thus functioning 1 past times 1 on each of them, alone looping or traversing volition assistance you.

This article is inward continuation of my before tutorial on ArrayList e.g. How to form ArrayList inward Java on descending order together with How to convert Array to ArrayList inward Java. If you lot haven’t read them already thus you lot may discovery them useful together with interesting.

How to Loop, Iterate or traverse Arraylist inward Java - Code Example

 Essentially at that topographic point are four ways to iterate, traverse of loop ArrayList inward Java:

1) Looping using Java5 foreach loop.

2) Looping ArrayList using for loop together with size() method.

3) Iterating ArrayList using Iterator.

4) Traversing ArrayList using ListIterator inward Java.

Looping ArrayList amongst foreach loop on Java 5

Java Iterator for looping or iterating over ArrayList. Since ArrayList provides size() method you lot tin too purpose apparently onetime for(int i; i<size; i++) loop too for iterating or traversing ArrayList inward Java. See instance department post service for consummate code instance of looping ArrayList inward Java.

Iterating ArrayList inward Java using Iterator together with piece loop

Another cool approach of looping ArrayList is using Iterator inward combination of while loop together with traverse until you lot teach to the halt of ArrayList. Iterator has a method hasNext() which volition render truthful until at that topographic point is an chemical ingredient inward Iterator. Always telephone band hasNext() before calling next() method on Iterator to avoid java.util.NoSuchElementException. Also past times using Iterator approach for looping ArrayList you lot tin take away chemical ingredient from ArrayList without fearfulness of ConcurrentModificationException. See below for total code example of looping ArrayList inward Java.

package test;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.ListIterator;

public class ArrayListLoopExample {

    public static void main(String args[]){
     
        //Creating Arraylist for loop example
        ArrayList<String> loopList = new ArrayList<String>();
     
        //Storing elements inward Java Arraylist
        loopList.add("low toll personal loan");
        loopList.add("cheap personal loan");
        loopList.add("personal loan inward 24 hours");
     
        //Loop Arraylist using foreach loop of JDK1.5
        System.out.println("=====================================================");
        System.out.println("ArrayList Loop Example using foreach loop of JDK 1.5");
        for(String element: loopList){
            System.out.println(element);
        }
     
        //Loop Arraylist using elementary for loop together with size method
        System.out.println("=====================================================");
        System.out.println("ArrayList Loop Example using for loop together with size()");
        for(int i=0; i<loopList.size(); i++){
            System.out.println(loopList.get(i));
        }
     
        //Iterate Arraylist using iterator together with piece loop inward Java
        System.out.println("=====================================================");
        System.out.println("ArrayList Loop Example using Iterator together with piece loop");
        Iterator<String> iterator = loopList.iterator();
        while(iterator.hasNext()){
            System.out.println(iterator.next());
        }
     
        //Iterate Arraylist using ListIterator together with piece loop inward Java
        System.out.println("=====================================================");
        System.out.println("ArrayList Loop Example using ListIterator together with piece loop");
        ListIterator<String> listIterator = loopList.listIterator();
        while(listIterator.hasNext()){
            System.out.println(listIterator.next());
        }
    }
}

Output:

=====================================================
ArrayList Loop Example using foreach loop of JDK 1.5
depression toll personal loan
inexpensive personal loan
personal loan inward 24 hours
=====================================================
ArrayList Loop Example using for loop together with size()
depression toll personal loan
inexpensive personal loan
personal loan inward 24 hours
=====================================================
ArrayList Loop Example using Iterator together with while loop
depression toll personal loan
inexpensive personal loan
personal loan inward 24 hours
=====================================================
ArrayList Loop Example using ListIterator together with while loop
depression toll personal loan
inexpensive personal loan
personal loan inward 24 hours

That’s all on four instance to loop ArrayList inward Java. We convey seen foreach loop, Iterator together with other approaches for traversing ArayList together with inward my watch foreach loop rules for elementary iteration together with Iterator rules if you lot involve to take away elements from ArrayList during iteration.ListIterator too offers add() method to add together novel elements inward ArrayList piece looping.

Further Learning
Java In-Depth: Become a Complete Java Engineer
Difference betwixt Hashtable together with HashMap inward Java

Difference betwixt Concurrent Collection together with Synchronized Collection inward Java

Top 10 Collection interview questions inward Java

10 Example of Hashtable inward Java

How to convert ArrayList to HashSet inward Java

Difference betwixt Iterator together with Enumeration inward Java

Difference betwixt fail-safe together with fail-fast Iterator inward Java

Sumber https://javarevisited.blogspot.com/