choicefactory.java

来自「源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例」· Java 代码 · 共 18 行

import java.util.*;
public class choiceFactory {
    multiChoice ui;
    //This class returns a Panel containing
    //a set of choices displayed by one of
    //several UI methods. 
    public multiChoice getChoiceUI(Vector choices) {
        if (choices.size() <=3)
            //return a panel of checkboxes
            ui = new checkBoxChoice(choices);
        else
            //return a multi-select listbox panel
            ui = new listboxChoice(choices);
        return ui;
    }            
}