mapdemo.java

来自「beginJsp2.0外文书籍源代码」· Java 代码 · 共 36 行

import java.util.*;

public class MapDemo 
{
  public static void main(String[] args)
  {
    Map employeeMap = new HashMap();

    employeeMap.put("Joey", "111-222-3333");
    employeeMap.put("Ross", "444-555-6666");
    employeeMap.put("Chandler", "777-888-9999");

    Iterator keyIter = employeeMap.keySet().iterator();
    while (keyIter.hasNext()) 
    {
      String nextName = (String) keyIter.next();
      String phoneNum = (String) employeeMap.get(nextName);
      System.out.println(nextName + ": " + phoneNum);
    }

    employeeMap.remove("Chandler");
    System.out.println("Removed Chandler; didn't like him much anyway");

    Map newEmployeeMap = new TreeMap();
    newEmployeeMap.putAll(employeeMap);

    keyIter = newEmployeeMap.keySet().iterator();
    while (keyIter.hasNext()) 
    {
      String nextName = (String) keyIter.next();
      String phoneNum = (String) newEmployeeMap.get(nextName);
      System.out.println(nextName + ": " + phoneNum);
    }
  }
}