test.java

23种GOF模式的java代码实现

package org.gof.action.visitor;

import java.util.Collection;
import java.util.ArrayList;

/**
 * <p>Title:Visitor访问者模式</p>
 * <p>Description:Visitor访问者模式范例</p>
 * <p>Copyright: Copyright (c) 2007</p>
 * 作用于某个对象群中各个对象的操作. 它可以使你在不改变这些对象本身的情况下,定义作用于这些对象的新操作
 * @author by lbj
 * @version 1.0
 */

public class Test {
  public static void main(String[] args) {
    Visitor visitor = new ConcreteVisitor();

    StringElement stringE = new StringElement("I am a String");
    visitor.visitString(stringE);

    Collection list = new ArrayList();
    list.add(new StringElement("I am a String1"));
    list.add(new StringElement("I am a String2"));
    list.add(new FloatElement(new Float(12)));
    list.add(new StringElement("I am a String3"));
    visitor.visitCollection(list);
  }
}