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爪哇语言简单工厂创立性模式介绍

2001-11-14 11:46作者：阎宏出处：yesky责任编辑：方舟

package com.javapatterns.simplefactory;

public interface FruitIF {
　void grow();

　void harvest();

　void plant();

　String color = null;
　String name = null;
}

　　　　　代码清单1. 接口FruitIF的源代码。这个接口确定了水果类必备的方法:种植plant(),生长grow(), 以及收获harvest()。

package com.javapatterns.simplefactory;

public class Apple implements FruitIF
{

　public void grow()
　{
　　log("Apple is growing...");
　}

　public void harvest()
　{
　　log("Apple has been harvested.");
　}

　public void plant()
　{
　　log("Apple has been planted.");
　}

　public static void log(String msg)
　{
　　System.out.println(msg);
　}

　public int getTreeAge(){ return treeAge; }

　public void setTreeAge(int treeAge){ this.treeAge = treeAge; }

　private int treeAge;
}

　　　　　代码清单2. 类Apple的源代码。萍果是多年生木本植物,因此具备树龄treeAge性质。

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