Why enhanced for loop in java

However, can you elaborate the point in the summary about Iterator being error prone? Do you mean the syntax is difficult? Or something else?

Does Enhanced for loop iterator under the hood. So if it does then how does the enhanced for loop works on simple java arrays. Post a Comment. Friday, July 9, How foreach or Enhanced for loop works in Java? It's a long time since JDK 1. The enhanced loop provides the cleanest way to loop through an array or collection in Java, as you don't need to keep track of the counter or you don't need to call the hasNext method to check whether there are more elements left.

The key point, which many Java developer doesn't know about the enhanced for loop is that you can use any Object which implements the Iterable interface on for : construct, you can even use enhanced for loop to loop through the array. Since JDK 8 also introduced a forEach function to provide looping functionality, don't confuse when I say for each loop with that. In this article, we'll see how enhanced for loop works and a couple of important points related to it.

Btw, Java 5 introduced several useful features along with enhanced for loop like Generics, Enum, Concurrency API, Variable arguments, Static import, covariant method overriding, etc. Nowadays, it's expected from a Java developer to know all these features by heart. If you feel you lack in any of these then I suggest joining these f ree Java Programming courses from Udemy and Educative.

One of the best courses to fill your gap in Java. Clearly, enhanced for loop has a shorter and cleaner syntax. If during iteration, you need an index of current element, then with enhanced for loop, you need to initialize a separate variable outside the loop. This index should be incremented in each iteration while with traditional for loop, it is initialized in the loop statement only.

This is one advantage that you get with primitive for loop. Skip to content Enhanced for loop also called advanced for loop or foreach loop is used to iterate over an array or a collection of elements such as list or set.

Liked the article? However, the for-each loop is easier to write and understand. This is why the for-each loop is preferred over the for loop when working with arrays and collections.

Course Index Explore Programiz. Java for Loop. Arrays in Java. Interfaces in Java. Java ArrayList. Popular Examples Check prime number. Print the Fibonacci series. Print Pyramids and Patterns. Java for-loop is a control flow statement that iterates a part of the program multiple times.

For-loop is the most commonly used loop in java. If we know the number of iteration in advance then for-loop is the best choice. Syntax: Attention reader! Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.

Here we can declare and initialize a local variable for loop. Here we can declare any number of variables but should have the same type by mistake if we are trying to declare a different data type then we will get a compile — time error. During the condition check, we can take any valid java expression that should be of type boolean. This part is optional and if we are not taking anything then the compiler will always place a true value here.