Java by API/java.util/Iterable

implements Iterable < Character >

   <source lang="java">

import java.util.Iterator; import java.util.NoSuchElementException;

class IterableString implements Iterable<Character>,

                            Iterator<Character> { 
 private String str; 
 private int count = 0; 

 IterableString(String s) { 
   str = s; 
 } 

 public boolean hasNext() { 
   if(count < str.length()) return true; 
   return false; 
 } 

 public Character next() { 
   if(count == str.length())  
     throw new NoSuchElementException(); 

   count++; 
   return str.charAt(count-1); 
 } 

 public void remove() { 
   throw new UnsupportedOperationException(); 
 } 

 public Iterator<Character> iterator() { 
   return this; 
 } 

}

public class MainClass {

 public static void main(String args[]) {  
   IterableString x = new IterableString("This is a test."); 

   for(char ch : x) 
     System.out.print(ch); 

   System.out.println(); 
 }  

}

      </source>