iterableclass.java

thinking in java 书中源码 第四版

//: holding/IterableClass.java
// Anything Iterable works with foreach.
import java.util.*;

public class IterableClass implements Iterable<String> {
  protected String[] words = ("And that is how " +
    "we know the Earth to be banana-shaped.").split(" ");
  public Iterator<String> iterator() {
    return new Iterator<String>() {
      private int index = 0;
      public boolean hasNext() {
        return index < words.length;
      }
      public String next() { return words[index++]; }
      public void remove() { // Not implemented
        throw new UnsupportedOperationException();
      }
    };
  }	
  public static void main(String[] args) {
    for(String s : new IterableClass())
      System.out.print(s + " ");
  }
} /* Output:
And that is how we know the Earth to be banana-shaped.
*///:~