Java-for iterating through an array

Format:
For (data type variable name: Array or collection) {
SOP (variable);
}

 Public Static void function_1 () {        //for the object array traversal, can I invoke the method of the object        string[] str = {"abc", "Itcast", "CN" };          for (String s:str) {          System.out.println (s.length ());        }      }

Implementing a For loop, iterating over an array
* Benefits: Less code, convenient for container traversal
* Disadvantages: No index, cannot manipulate elements inside the container

 Public Static void function () {        int[] arr = {3,1,9,0};          for (int  i:arr) {          System.out.println (i+1);        }        System.out.println (arr[0]);      }

Enhanced for loop Traversal collection

 Public Static void function_2 () {          ArrayListnew arraylist<person>();          Array.add (new person ("a", +));          Array.add (new person ("B", ten));            for (person P:array) {            System.out.println (p); // System.out.println (p.tostring ());           }        }

Java-for iterating through an array