神马 - 云代码空间
—— 任何傻瓜都能写出计算机可以理解的代码，好的程序员能写出人能读懂的代码。
Class aClass = Class.forName(xxx.xx.xx); Object anInstance = aClass.newInstance();
Class Driver{
protected static Driver current;
public static Driver getDriver(){
return current;
}
}
Class MyDriver extends Driver{
static{
Driver.current=new MyDriver();
}
MyDriver(){}
}
Class.forName("MyDriver");
Driver d=Driver.getDriver();
public class MyJDBCDriver implements Driver {
static {
DriverManager.registerDriver(new MyJDBCDriver());
}
}
class A
{
void aa()
{
System.out.println ("A里的");
}
}
class B extends A
{
void aa()
{
System.out.println ("B里的");
}
}
class C extends A
{
void aa()
{
System.out.println ("C里的");
}
}
public class ClassDemo
{
public static void main (String[] args)
{
ClassDemo t = new ClassDemo();
t.show ("C");
}
void show (String name)
{
try
{
A show = (A) Class.forName (name).newInstance();
show.aa();
}
catch (Exception e)
{
System.out.println (e);
}
}
}