Answer by vivekkurien for How does the Java 'for each' loop work?
In Java 8, they introduced forEach. Using it List, Maps can be looped. Loop a List using for each List<String> someList = new ArrayList<String>(); someList.add("A"); someList.add("B");...
View ArticleAnswer by Dulith De Costa for How does the Java 'for each' loop work?
Using older Java versions including Java 7 you can use foreach loop as follows. List<String> items = new ArrayList<>(); items.add("A"); items.add("B"); items.add("C"); items.add("D");...
View ArticleAnswer by gomisha for How does the Java 'for each' loop work?
The Java for each loop (aka enhanced for loop) is a simplified version of a for loop. The advantage is that there is less code to write and less variables to manage. The downside is that you have no...
View ArticleAnswer by shubhranshu for How does the Java 'for each' loop work?
List<Item> Items = obj.getItems(); for(Item item:Items) { System.out.println(item); } Iterates over all the objects in Items table.
View ArticleAnswer by stackFan for How does the Java 'for each' loop work?
Prior to Java 8, you need to use the following: Iterator<String> iterator = someList.iterator(); while (iterator.hasNext()) { String item = iterator.next(); System.out.println(item); } However,...
View ArticleAnswer by Rei Brown for How does the Java 'for each' loop work?
This looks crazy but hey it works List<String> someList = new ArrayList<>(); //has content someList.forEach(System.out::println); This works. Magic
View ArticleAnswer by Alexander Drobyshevsky for How does the Java 'for each' loop work?
An alternative to forEach in order to avoid your "for each": List<String> someList = new ArrayList<String>(); Variant 1 (plain): someList.stream().forEach(listItem -> {...
View ArticleAnswer by L Joey for How does the Java 'for each' loop work?
As so many good answers said, an object must implement the Iterable interface if it wants to use a for-each loop. I'll post a simple example and try to explain in a different way how a for-each loop...
View ArticleAnswer by Santhosh Rajkumar for How does the Java 'for each' loop work?
public static Boolean Add_Tag(int totalsize) { List<String> fullst = new ArrayList<String>(); for(int k=0;k<totalsize;k++) { fullst.addAll(); } }
View ArticleAnswer by i_am_zero for How does the Java 'for each' loop work?
As defined in JLS for-each loop can have two forms: If the type of Expression is a subtype of Iterable then translation is as: List<String> someList = new ArrayList<String>();...
View ArticleAnswer by Manohar for How does the Java 'for each' loop work?
It adds beauty to your code by removing all the basic looping clutter. It gives a clean look to your code, justified below. Normal for loop: void cancelAll(Collection<TimerTask> list) { for...
View ArticleAnswer by WIll for How does the Java 'for each' loop work?
The Java for-each idiom can only be applied to arrays or objects of type *Iterable. This idiom is implicit as it truly backed by an Iterator. The Iterator is programmed by the programmer and often uses...
View ArticleAnswer by Jrovalle for How does the Java 'for each' loop work?
In Java 8 features you can use this: List<String> messages = Arrays.asList("First", "Second", "Third"); void forTest(){ messages.forEach(System.out::println); } Output First Second Third
View ArticleAnswer by aliteralmind for How does the Java 'for each' loop work?
The foreach loop, added in Java 5 (also called the "enhanced for loop"), is equivalent to using a java.util.Iterator--it's syntactic sugar for the same thing. Therefore, when reading each element, one...
View ArticleAnswer by PrivateName for How does the Java 'for each' loop work?
A foreach loop syntax is: for (type obj:array) {...} Example: String[] s = {"Java", "Coffe", "Is", "Cool"}; for (String str:s /*s is the array*/) { System.out.println(str); } Output: Java Coffe Is Cool...
View ArticleAnswer by oneConsciousness for How does the Java 'for each' loop work?
The concept of a foreach loop as mentioned in Wikipedia is highlighted below: Unlike other for loop constructs, however, foreach loops usually maintain no explicit counter: they essentially say "do...
View ArticleAnswer by MRocklin for How does the Java 'for each' loop work?
Here is an answer which does not assume knowledge of Java Iterators. It is less precise, but it is useful for education. While programming we often write code that looks like the following: char[]...
View ArticleAnswer by Ryan Delucchi for How does the Java 'for each' loop work?
The Java "for-each" loop construct will allow iteration over two types of objects: T[] (arrays of any type) java.lang.Iterable<T> The Iterable<T> interface has only one method:...
View ArticleAnswer by Mikezx6r for How does the Java 'for each' loop work?
The construct for each is also valid for arrays. e.g. String[] fruits = new String[] { "Orange", "Apple", "Pear", "Strawberry" }; for (String fruit : fruits) { // fruit is an element of the `fruits`...
View ArticleAnswer by billjamesdev for How does the Java 'for each' loop work?
Also note that using the "foreach" method in the original question does have some limitations, such as not being able to remove items from the list during the iteration. The new for-loop is easier to...
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