Difference Betwixt For Loop As Well As Enhanced For Loop Inward Java

Though yous tin work both for loop too enhanced for loop to iterate over arrays too collections similar a list, set, or map. There are to a greater extent than or less key differences betwixt them. In general, enhanced for loop is much to a greater extent than slow to work too less fault prone than for loop, where yous postulate to care the steps manually. At the same time, for loop is much to a greater extent than powerful because yous acquire the chance to command over looping process. All the difference, yous volition larn inward this article, stems from this real fact that traditional for loop gives to a greater extent than command that enhanced for loop but on the other manus enhanced or advanced for loop gives to a greater extent than convenience.

So, the alternative is upwardly to you, if yous postulate to a greater extent than command so traditional for loop is ideal too if yous don't postulate that degree of control, simply opt for convenience past times using heighten for loop equally shown here.

Difference betwixt for loop too advanced for loop inward Java

Let's run across to a greater extent than or less key differences betwixt traditional for loop too enhanced for loop of Java 5. This volition aid yous to sympathize the concept amend too accept decision 

1) The for loop is introduce from the showtime i.e. JDK 1, but enhanced for loop was added on Java 5, thence it's solely available from JDK v onward.


2) In guild to loop over a container using enhanced for loop, your container must implement the Iterable interface, both array too collection implement this, but in that location is no such requirement for traditional for loop.

2) The enhanced for loop executes inward sequence. i.e  the counter is ever increased past times one, where equally inward for loop yous tin alter the mensuration equally per your want e.g doing something similar i=i+2; to loop every minute chemical constituent inward an array or collection.

3) The enhanced for loop tin solely iterate inward incremental order. nosotros cannot configure it to perish inward decrement. i.e inward for loop nosotros tin write i-- inward mensuration counter to perish backward.

4) You don't guide maintain access to array index inward enhanced for loop, which agency yous cannot supersede the chemical constituent at giving the index, but for loop furnish access to the index, thence allows yous to replace whatsoever chemical constituent inward the array.

5) If nosotros guide maintain a requirement that array should live on displayed sequence inward the forrad direction too nosotros likewise don't desire to alter the existent value inward the array accidently or intentionally past times whatsoever user etc so nosotros should work the enhanced for loop.

6) Since Java 8, yous tin likewise work the forEach() method to iterate over a collection inward Java. This method is added inward both Iterable too Stream interface to allow seamless iteration using functional programming idiom.



Here is the sample plan to demonstrate how yous tin work both for loop too enhanced for loop to iterate over an array too a listing inward Java.

Iterating over a listing inward Java

import java.util.ArrayList; import java.util.Arrays; import java.util.List;  public class App {    public static void main(String args[]) {      List<String> gadgets = new ArrayList<>(         Arrays.asList("Apple watch", "Samsung Gear 3", "iPhone 7+"));      // iterating over List using for loop     System.out.println("iterating over a List using for loop inward Java:");     for (int i = 0; i < gadgets.size(); i++) {       System.out.println(gadgets.get(i));     }      // iterating over List using enhanced for loop     System.out.println("iterating over a List using enhanced for loop inward Java:");     for (String gadget : gadgets) {       System.out.println(gadget);     }   }  }  Output iterating over a List using for loop in Java: Apple watch Samsung Gear 3 iPhone 7+ iterating over a List using enhanced for loop in Java: Apple watch Samsung Gear 3 iPhone 7+

You tin run across that elements of a listing are displayed inward sequence using both traditional too enhanced for loop inward Java. Now, let's run across how to iterate over an array inward Java using both kinds of loops inward Java:

Iterating over an array inward Java

/**  * Java Program to iterate over an array  * using for loop too enhanced for loop inward Java  * @author WINDOWS 8  *  */ public class App {    public static void main(String args[]) {      int[] cubes = {1, 4, 9, 16, 25, 36};      // iterating over an array using for loop     System.out.println("iterating over an array using for loop inward Java:");     for (int i = 0; i < cubes.length; i++) {       System.out.println(cubes[i]);     }      // iterating over an array using enhanced for loop     System.out.println("iterating over an array using enhanced for loop inward Java:");     for (int cube : cubes) {       System.out.println(cube);     }   }  }  Output iterating over an array using for loop inward Java: 1 4 9 16 25 36 iterating over an array using enhanced for loop inward Java: 1 4 9 16 25 36

That's all most the difference betwixt for loop too enhanced for loop inward Java. If yous solely desire to iterate over elements from an array or a collection e.g. a listing or a fix so work enhanced for loop, it's convenient too less fault prone, but if yous desire to a greater extent than command over iteration procedure so work traditional for loop. With the introduction of forEach() method inward Java 8, yous similar a shot guide maintain 3 for loop sort of build to loop over an array or collection inward Java. See this article to larn to a greater extent than most the journeying of the for loop inward Java i.e. from for(; index; ) to enhanced for loop to forEach().


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Further Learning
Java In-Depth: Become a Complete Java Engineer
Java Fundamentals: Collections
Data Structures too Algorithms: Deep Dive Using Java

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