5 Examples Of Enhanced For Loop Inward Java

Enhanced for loop was added way dorsum inwards 2004 inwards Java as well as it provides an slow as well as cleaner way to iterate over array as well as Collection inwards Java. The introduction of forEach() inwards Java 8 has farther improved iteration but that doesn't hateful that you lot involve to forget the for each loop. In this article, you'll encounter simply about cool examples of enhanced for loop inwards Java which volition assist you lot to write improve as well as to a greater extent than readable code inwards Java. It's likewise less error-prone because you lot don't bring to bargain amongst an index similar you lot involve to amongst the classic "for" loop. This agency no adventure of one-off error, agency no peril of starting amongst index nada when you lot desire to start amongst 1 or vice-versa.

Though similar other for loop it likewise has simply about constraints as well as restrictions similar you lot cannot take elements during iteration, for that you lot involve to move the Iterator.

Another limitation of enhanced "for" loop is that you lot cannot acquire back, agency you lot tin start from the final chemical gene as well as acquire dorsum towards the starting fourth dimension element. This is possible inwards traditional "for" loop because you lot bring access to the index.

Syntax of The Enhanced "for" Loop

If you lot are wondering how is the enhanced "for" loop looks similar as well as what is the syntax to move it, hither is an icon from Cay S. Horstmann's Core Java Book Chapter 7, which clearly explains the syntax of enhanced for loop inwards Java:

You tin encounter that you lot simply involve to declare a variable of the type your Collection holds as well as you lot are done.

Pros of enhanced for loop
1. Cleaner code, slow to write as well as read
2. No adventure of one-off error

Cons of enhanced for loop
1. You cannot remove() elements during iteration.
2. You cannot acquire backward during traversal, it ever from starting fourth dimension to last

And, if you lot desire to larn to a greater extent than nearly enhanced for loop concepts, you lot tin see The Complete Java MasterClass course on Udemy. One of the most comprehensive as well as up-to-date course of teaching to larn Java fundamentals.

Enhanced for loop Examples inwards Java

Here are v examples of enhanced for loop inwards Java

import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.HashSet; import java.util.Iterator; import java.util.List;   public class Main {     public static void main(String args[]) {       // Example 1 - You tin move enhanced for loop amongst array     String[] currencies = { "JPY", "AUD", "USD" };       for (String currency : currencies) {       System.out.println(currency);     }       // Example 2 - You tin move enhanced for loop amongst collection     // e.g. list, prepare or queue     Collection<Integer> primes = new HashSet<>();     primes.add(2);     primes.add(3);     primes.add(5);       for (Integer prime number : primes) {       System.out.println(prime);     }       // Example three - You tin move whatsoever object which implements Iterable     // amongst enhanced for loop inwards Java     MyIterable<Integer> custom = new Main.MyIterable<>(Arrays.asList(1, 2, 3));     for (Integer release : custom) {       System.out.println(number);     }       // Example four - You cannot take elements when iterating over     // Collection using enhanced for loop, equally iterator's remove()     // method is non accessible as well as Collection's remove() method     // volition throw ConcurrentModificationException     List<Integer> multiples = new ArrayList<>();     multiples.add(10);     multiples.add(20);     multiples.add(30);       for (Integer i : multiples) {       // multiples.remove(i);     }       // Example 5 - Iterating over a 2 dimensional array using     // enhanced for loop     int[][] cubes = { { 2, 4 }, { 3, 9 }, { 4, 16 } };       for (int[] numbers : cubes) {       for (int i : numbers) {         System.out.println(i);       }     }     }     private static class MyIterable<T> implements Iterable<T> {     private Collection<T> repository;       public MyIterable(Collection<T> source) {       repository = source;     }       @Override     public Iterator<T> iterator() {       return repository.iterator();     }     } }

That's all nearly how to iterate over Collection or array using enhanced for loop inwards Java. These examples clearly demonstrate might as well as limitation of enhanced for loop inwards Java.  Try to move it on your day-to-day coding to improve the readability of your Java code.

Further Reading
The Complete Java MasterClass
tutorial)

Difference betwixt abstract cast as well as interface inwards Java 8? (answer)

What is the default method inwards Java 8? (example)

How to format/parse the appointment amongst LocalDateTime inwards Java 8? (tutorial)

How to move peek() method inwards Java 8 (example)

How to move filter() method inwards Java 8 (tutorial)

5 Books to Learn Java 8 from Scratch (books)

20 Examples of Date as well as Time inwards Java 8 (tutorial)

How to form the map past times keys inwards Java 8? (example)

How to convert List to Map inwards Java 8 (solution)

How to form the may past times values inwards Java 8? (example)

How to bring together String inwards Java 8 (example)

5 Free Courses to larn Java 8 as well as ix (courses)

Thanks for reading this article thence far. If you lot similar this tutorial as well as thence delight part amongst your friends as well as colleagues. If you lot bring whatsoever question, incertitude or feedback nearly this tutorial as well as my explanation as well as thence delight drib a note.

P. S. - If you lot are looking for simply about gratis courses to larn recent changes on Java 8 as well as Java ix as well as thence you lot tin likewise encounter this listing of Free Java 8 as well as ix Courses for Programmers

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