12.10作业2

/2、定义一个矩形类Rectangle: [必做题]
2.1 定义三个方法:getArea()求面积、getPer()求周长,showAll()分别在控制台输出长、宽、面积、周长。
2.2 有2个属性:长length、宽width
2.3 通过构造方法Rectangle(int width, int length),分别给两个属性赋值
2.4 创建一个Rectangle对象,并输出相关信息
/




package Text1;

public class Rectangle {
	int length;
	int width;
	
	Rectangle(int length,int width){
		this.length = length;
		this.width = width;
	}
	 double getArea(int length,int width){
		int getArea = this.length*this.width;
		return getArea;
	}
	 double getPer(int length,int width){
			int getPer = 2*(this.length+this.width);
			return getPer;
    }
	 void showAll(int length,int width){
		 System.out.println("長:"+this.length+"寬:"+this.width);
		 System.out.println("周長:"+2*(this.length+this.width));
		 System.out.println("面積:"+this.length*this.width);
	 }
	 
	 
	 
	 
}

package Text1;

public class Text2 {
public static void main(String[] args) {
	Rectangle A = new Rectangle(3,4);
		A.showAll(3, 4);
	

}
}

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转载自blog.csdn.net/weixin_43961593/article/details/84949613