factoryclass.java

ATM简易模拟器 使用java源码模拟银行ATM机的处理过过程

/**************************************************
 * 本类为动态加载各功能类的工厂类，是实现工厂模式的主要类
 * 本程序的各功能类的类名已经放在本类的classNameArray数组中
 * 以方便加载和类名的重构修改
 */
package util;

public class FactoryClass {
	public static String[] classNameArray = { "user.AddUser",
			"util.ShowChoice1", "user.Login", "util.ShowChoice2",
			"user.ReadAccounts", "user.CurrentUser", "user.ModifyUser",
			"operation.Inquire", "operation.InMoney", "operation.GetMoney" };

	// classNameArray数组存放了工厂类动态加载时的类名，ShowGUI已被取消
	public static FatherInterface getInstance(String inputClassName) {
		FatherInterface newInstanceClass = null;
		try {
			Class newClass = Class.forName(inputClassName);
			newInstanceClass = (FatherInterface) newClass.newInstance();
		} catch (ClassNotFoundException e) {
			// e.printStackTrace();
			System.out.println("输入了不正确的类名！1" + inputClassName);
		} catch (InstantiationException e) {
			// e.printStackTrace();
			System.out.println("输入了不正确的类名！2" + inputClassName);
		} catch (IllegalAccessException e) {
			// e.printStackTrace();
			System.out.println("输入了不正确的类名！3" + inputClassName);
		}
		return newInstanceClass;
	}
}