propdemodef.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter8;

import java.util.*;

class PropDemoDef
{
    public static void main(String args[])
    {
        Properties defList = new Properties();
        defList.put("Florida", "Tallahassee");
        defList.put("Wisconsin", "Madison");
        Properties capitals = new Properties(defList);
        Set states;
        String str;
        capitals.put("Illinois", "Springfield");
        capitals.put("Missouri", "Jefferson City");
        capitals.put("Washington", "Olympia");
        capitals.put("California", "Sacramento");
        capitals.put("Indiana", "Indianapolis");
        // 显示Hashtable中的所有州和州首府
        states = capitals.keySet(); // 得到健的集合视图
        Iterator itr = states.iterator();
        while(itr.hasNext())
        {
            str = (String) itr.next();
            System.out.println("The capital of " + str + " is " +
                capitals.getProperty(str) + ".");
        }
        System.out.println();
        // 在缺省的链表中可以找到Florida
        str = capitals.getProperty("Florida");
        System.out.println("The capital of Florida is " + str + ".");
    }
}