What is the difference between java's array loop and ordinary loop?

The array loop you mentioned is an enhanced for loop, also called for each loop, which is a powerful loop structure added by JDK 5.0. You can use it to process each element in an array or collection in turn without being distracted by specifying subscript values.

For(int element: a)

system . out . println(element)；

Using the traditional for loop can achieve the same effect:

for(int I = 0； I<a. Length; i++)

system . out . println(a[I])；

However, the "for each" loop statement is more concise and less prone to errors.

**

"for each" is admirable if you want to deal with all the elements in a collection. However, in many cases, you still need to use the traditional for loop. For example:

1. You don't want to traverse the whole collection.

2. Subscript values need to be operated inside the loop.

etc

Use it as appropriate.