Using iterator interface or for each statement in Java

Question

Stack<String> sk = new Stack<String>();

sk.push("Hello");
sk.push("Hello1");
sk.push("Hello2");

There are two ways i am iterating this Stack Object.

for(String s : sk){
   System.out.println("The Values of String in SK" +sk);
}

// Way two..

Iterator<String> it=sk.iterator();
    while(it.hasNext())
    {
        String iValue=(String)it.next();
        System.out.println("Iterator value :"+iValue);
    }

1. What is the difference between these two?
2. Any Advantage if i choose one among them?
3. Which is the preferred way of iterating?

Answer 1

The Iterator has the advantage that you can remove elements from the collection while iterating over it. Foreach may throw ConcurrentModificationExceptions there.

If you don't need that, I prefer the former way because it is easier to read.