iterators2.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 26 行

//: c09:Iterators2.java
// Revisiting Iterators.
// {NoAutomaticTesting}
import java.util.*;

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

public 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());
  }
} ///:~