The For Loop

There are two types of for loops in Java. Your traditional loop:

for (int i = 0; i < 10; i++) {

}

Or the advanced loop that will loop through items in say an array:

for (String s : stringArray) {

}

Let's go through both of these examples and see what comes of it.

First, let's create a String Array for the loops to process.

String[] strArray = {"one", "two", "three"};

Simple enough. Just an array containing three values of one, two and three.

With the traditional for loop, you would loop through the array like this:

for (int i = 0; i < strArray.length; i++) {
    System.out.println(strArray[i]);
}

As you might have guessed, it outputs the three values:

One
Two
Three

Now, let's do the same thing, but using the other for loop. Sometimes this loop is called a For Each loop.

for (String s : strArray) {
    System.out.println(s);
}

Again we get the three values:

One
Two
Three

I prefer the new method myself. It comes in handy. But there are times that you'll want to use the traditional for loop, (for example if you want to run through a Multidensional Array).

Happy Coding!