arttracer.java

来自「《Java与模式》一书的源代码」· Java 代码 · 共 25 行

package com.javapatterns.simplefactory.exercise;

public class ArtTracer
{
    public static Shape factory(String which) throws BadShapeException
    {
        if (which.equalsIgnoreCase("circle"))
        {
            return new Circle();
        }
        else if (which.equalsIgnoreCase("square"))
        {
            return new Square();
        }
        else if (which.equalsIgnoreCase("triangle"))
        {
            return new Triangle();
        }
        else
        {
            throw new BadShapeException(which);
        }
    }
}