类与对象基础实验(一)实验报告(3)

浙大城院java实验报告

class Rectangle{

double length,width;

}

public class Text2 {

public static void main(String args[]){

//请用无参构造函数创建矩形a，用有参构造函数创建矩形b

Scanner scanner=new Scanner(System.in);

} System.out.println("请输入矩形a的长和宽 :"); Rectangle r1=new Rectangle(); r1.length=scanner.nextInt(); r1.width=scanner.nextInt(); System.out.println("请输出矩形a的周长和面积："); System.out.println( "矩形a的周长" + r1.perimeter()); System.out.println( "矩形a的面积:" + r1.area()); Rectangle rectangle = new Rectangle(10,15); System.out.println("请输出矩形b的周长和面积："); System.out.println( "矩形b的周长" + rectangle.perimeter()); Rectangle(){}; Rectangle(double alength,double awidth){ } public double perimeter(){//矩形的周长 return (length+width)*2; } public double area(){//矩形的面积 return length*width; } length=alength; width=awidth; System.out.println( "矩形b的面积:" + rectangle.area()); }

(2) 程序运行结果截图如下：