typedbin.java

来自「Thinking in C++ 2nd edition source code 」· Java 代码 · 共 33 行

//: C25:TypedBin.java
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Vector that knows how to grab the right type
package c16.doubledispatch;
import c16.trash.*;
import java.util.*;

public abstract class TypedBin {
  Vector v = new Vector();
  protected boolean addIt(Trash t) {
    v.addElement(t);
    return true;
  }
  public Enumeration elements() {
    return v.elements();
  }
  public boolean add(DDAluminum a) {
    return false;
  }
  public boolean add(DDPaper a) {
    return false;
  }
  public boolean add(DDGlass a) {
    return false;
  }
  public boolean add(DDCardboard a) {
    return false;
  }
} ///:~