JavaDemo_0830_2242
class Channel{
public void connect()
{
System.out.println("【Channel父类】");
}
}
class Database extends Channel
{
public void connect()
{
super.connect();
System.out.println("覆写【Channel父类】的connet()方法");
}
}
public class JavaDemo_0830_2242
{
public static void main(String[] args)
{
//Channel channel=new Channel();//Channet类中没有定义构造器，那么会默认创建一个无参构造器
Database database=new Database();
database.connect();
}
}
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