一、代码如下
package www.wujianbotwo;
class Door {
int height= 200;
int weight= 80;
String material= "实木";
private void open() {
// TODO Auto-generated method stub
System.out.println("开门");
}
public void close() {
// TODO Auto-generated method stub
System.out.println("关门");
}
}
package www.wujianbotwo;
public class SafeDoor extends Door {
@Override
//public void close() {
// TODO Auto-generated method stub
//super.close();
//}
public void close() {
// TODO Auto-generated method stub
System.out.println("子类关闭");
}
public void closeTwo() {
// TODO Auto-generated method stub
super.close();
}
public void closeThre() {
// TODO Auto-generated method stub
this.close();
}
public void lock() {
// TODO Auto-generated method stub
System.out.println("子类锁门");
}
}
-generated method stub
Door door= new Door();
//door.open();
System.out.println(door.hashCode());
SafeDoor sdoor= new SafeDoor();
//sdoor.open();
sdoor.lock();
sdoor.close();
sdoor.closeTwo();
sdoor.closeThre();
}
}