首頁猿問怎樣創(chuàng)建矩形類方法來計算周長和面積？

怎樣創(chuàng)建矩形類方法來計算周長和面積？

Java

陳靜善啊哈哈4305975 2016-11-11 09:44:02

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1 回答

yanrun

TA貢獻(xiàn)317條經(jīng)驗(yàn) 獲得超240個贊

public?class?Rectangle?{

	private?double?length;
	private?double?width;
	
	public?Rectangle(double?length,?double?width)?{
		this.length?=?length;
		this.width?=?width;
	}
	
	public?double?getArea()?{
		return?this.length?*?this.width;
	}
	
	public?double?getPerimeter()?{
		return?(this.length?+?this.width)?*?2;
	}
	
	public?static?void?main(String[]?args)?{
		Rectangle?r?=?new?Rectangle(4,?3);
		System.out.println("面積為："?+?r.getArea());
		System.out.println("周長為："?+?r.getPerimeter());
	}
}

1 反對回復(fù) 2016-11-11