Question

Is there any alternative in Java that may correspond to foreach{} available in other languages such as C# or VB or the languages alike? It may sometimes, in some very specific circumstances be very useful and almost mandatory.

Can the following while(){} loop in Java be replaced with a foreach loop or some other concepts that may exist in Java and correspond to foreach?

public class Demo
{
    public static void main(String[] args)
    {
        ArrayList<String> arrayList = new ArrayList<String>();

        arrayList.add("A");
        arrayList.add("B");
        arrayList.add("C");
        arrayList.add("D");
        arrayList.add("E");

        Iterator<String>it=arrayList.iterator();

        while(it.hasNext())
        {
            System.out.println(it.next());
        }
    }
}

---

I went on a long search on Google but I couldn’t.

Answer 1

If an object implements Iterable or it is an array, then you can use the enhanced for-each loop (introduced in Java 5.0)

for(E e : MyCollection) {
    // stuff
}

If your example, you can do

ArrayList<String> list = new ArrayList<String>();
list.add("A");
list.add("B");
list.add("C");
list.add("D");
list.add("E");

for(String s : list) System.out.println(s);

Technically your example was using a non-parameterized list, so you would use

for(Object o : arrayList) System.out.println(o.toString());