What Are Restrictions for Enchanced For Loop?

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You can not use "Enhanced For Loop" to remove elements from a collect or an array. Also, you can not modify the current slot in a collect or an array. It is not usable for loops where you need to replace elements in a list or array as you traverse it. For example,

class Program {
  public static void main(String[] args) {
    Collection c = new ArrayList();
    c.add("A");
    c.add("B");
    c.add("C");
    for(String name : c) {
       name = "CHANGED";
    }

    for(String name : c){
       System.out.print(name);
    }
  }
}  

You will see that the ouput still "ABC". All you have done is modified the local reference variable name.