ex050107.java

来自「我在学习JAVA的讲义」· Java 代码 · 共 18 行

class BaseWidget extends Object{
	String name = "BaseWidget";
	void speak(){
		System.out.println("I am a "+name);
	}
}

class TypeAWidget extends BaseWidget{
	TypeAWidget(){
		name = "TypeA";
	}
	
	public static void main(String[] args){
		//Object A = new BaseWidget(); A.speak();
		BaseWidget B = new TypeAWidget(); B.speak();
		//TypeAWidget C = new BaseWidget();C.speak();
	}
}