registerfactory.java

这是一份标准的课程设计文档

package	cpu;
import myException.*;
class	registerFactory 
{
	public registerFactory(){}
	public static register factory(String reg)
		throws NoSuchRegistException
	{
		if(reg.equals("data"))
			return	new	register_data();
		else if(reg.equals("pc"))
			return	new register_pc();
		else if(reg.equals("ar"))
			return	new register_ar();
		else if(reg.equals("ir"))
			return	new register_ir();
		else throw new NoSuchRegistException("没有此种寄存器!");
	}
}