'for' statement for Iterable object in JDK 5 has been enhanced. : Iterable Interface « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Iterable Interface

It can iterate over a Collection without the need to call the iterator method. The syntax is

for (Type identifier : expression) {
         statement (s)
     }

In which expression must be an Iterable.

import java.util.Arrays;
import java.util.List;

public class MainClass {
  public static void main(String[] args) {
    List list = Arrays.asList("A", "B", "C", "D");

    for (Object object : list) {
      System.out.println(object);
    }

  }
}

A
B
C
D