一、代碼如下

package www.wujianbotwo;

class Door {
	int height= 200;
	int weight= 80;
	String material= "實木";
	
	public void open() {
		// TODO Auto-generated method stub
		System.out.println("開門");

	}
	
	public void close() {
		// TODO Auto-generated method stub
		System.out.println("關門");

	}

}

package www.wujianbotwo;

public class TestDoor {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Door door= new Door();
		door.open();
		System.out.println(door.hashCode());
		

	}

}

【自動化__持續集成】___java___繼承