Question about MalaGupta's Review Note 5.9 (Enhanced for)

[Winston Liek]

Accdg to the book:

[javadoc]The enhanced for loop can’t be used to iterate over multiple collections or
arrays in the same loop.[/javadoc]

It does not provide any explanation/examples there..

Can someone please provide an example or explanation please enlighten me.

[Roel De Nijs]

Let's take these arrays as an example:

int[] array1 = {1, 3, 5, 7, 9};
int[] array2 = {2, 4, 6, 8, 10};

With a regular for loop you could write something like the following code snippet to print both arrays. This is not possible using the enhanced for loop. And of course the same applies if I had used collections instead of arrays:

for (int i=0, j=0 ; i<array1.length && j><array2.length ; i++, j++) {
  System.out.print(array1[i] + " " + array2[j] + " ");
}

Hope it helps!