parcel9.java

来自「Java编程思想 第八课 全源码」· Java 代码 · 共 27 行

//: c08:Parcel9.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Using "instance initialization" to perform 
// construction on an anonymous inner class.

public class Parcel9 {
  public Destination 
  dest(final String dest, final float price) {
    return new Destination() {
      private int cost;
      // Instance initialization for each object:
      {
        cost = Math.round(price);
        if(cost > 100)
          System.out.println("Over budget!");
      }
      private String label = dest;
      public String readLabel() { return label; }
    };
  }
  public static void main(String[] args) {
    Parcel9 p = new Parcel9();
    Destination d = p.dest("Tanzania", 101.395F);
    System.out.println(d.readLabel());
  }
} ///:~