Question about "Enhanced for loop"

Question

public class NewLoopTest{
     public NewLoopTest(){
          int result=0;                      
          int[] a=new int[20];           
          for(int i=0;i<a.length;i++){
               a=i++;
          for(int i:a){  
System.out.println("i="+i+";"+"a["+i+"]="+a[i]+";result="+result+"+"+i+"="+(result+i));
               result+=i;           
          System.out.println("-------------");
          result=0;
          for(int i=0;i<a.length;i++){
               System.out.println("i="+i+";"+"a["+i+"]="+a[i]+";result="+result+"+"+i+"="+(result+i));
               result+=i;
This code counts sum of the elements of a array.
At first I use the enhanced for loop and at second I use the traditional for.
Enhanced for loop in sdk1.5 returns only even elements of array, am I right?

Answer 1

Enhanced for loop in sdk1.5 returns only even
elements of array, am I right?No. It covers them all.
The i in the enhanced for loop is not the index. It's the element at the current index. You don't have access to the index in the new loop because you don't need it.
for (int item : arr) {
    System.out.println(item);
// is equivalent to
for (int ix = 0; ix < arr.length; ix++) {
    int item = aa[ix];
    System.out.println(item);
}The i in your new loop is the same as a [ i ] in the old loop.