public?class?Show?{
????public?static?void?main(String[]?args)?{
		Shape?shape1?=?new?Circle();
		Shape?shape2?=?new?Rectangle();
		shape1.area();
		shape1.grith();
		shape2.area();
		shape2.grith();
	}

}

public?abstract?class?Shape?{
	
	public?abstract?void?area();
	public?abstract?void?grith();

}
public?class?Circle?extends?Shape?{
????double??r?;
	static?double?pi?=?3.14;
	public?void?area()?{
		System.out.print("輸入一個半徑：");
		Scanner?scanner?=?new?Scanner(System.in);
		int?r?=?scanner.nextInt();
		this.r?=?r;
		scanner.close();
		
		double?area?=?pi*r*r;
		System.out.println("the?circle's?area?is?"?+?area);
	}

	public?void?grith()?{
	????double?grith?=?2*pi*r;
????????System.out.println("the?grith?is?"?+?grith);
	}

}
public?class?Rectangle?extends?Shape{

	static?double?length?=?0;
	static?double?width?=?0;
	public?void?area()?{
		System.out.print("輸入長和寬：");
		Scanner?scanner?=?new?Scanner(System.in);
		double?length?=?scanner.nextDouble();
		double?width?=?scanner.nextDouble();
		scanner.close();
		
		double?area?=?length*width;
		System.out.println("the?rectangle's?area?is?"?+?area);
	}

	public?void?grith()?{
		//?TODO?Auto-generated?method?stub
	
	????double?grith?=?2*length*width;
????????System.out.println("the?rectangle's?grith?is?"?+?grith);
	}

}