propdemo.java

来自「java2参考大全上的例子的源码和自己的理解.」· Java 代码 · 共 42 行

package properties;

/**
 该程序的输出如下所示：
 The capital of Illinois is Springfield.
 The capital of Florida is Tallahassee. */

// Use a default property list.
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");

    // Show all states and capitals in hashtable.
    states = capitals.keySet(); // get set-view of keys
    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();
    // Florida will now be found in the default list.
    str = capitals.getProperty("Florida");
    System.out.println("The capital of Florida is "
                       + str + ".");
  }
}