iterators2.java

Java编程思想 第九课 全源码

//: c09:Iterators2.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Revisiting Iterators.
import java.util.*;

class PrintData {
  static void print(Iterator e) {
    while(e.hasNext())
      System.out.println(e.next());
  }
}

class Iterators2 {
  public static void main(String[] args) {
    ArrayList v = new ArrayList();
    for(int i = 0; i < 5; i++)
      v.add(new Mouse(i));
    HashMap m = new HashMap();
    for(int i = 0; i < 5; i++)
      m.put(new Integer(i), new Hamster(i));
    System.out.println("ArrayList");
    PrintData.print(v.iterator());
    System.out.println("HashMap");
    PrintData.print(m.entrySet().iterator());
  }
} ///:~