#java#运行报错：The method computArea(double, double) is undefined for the type Scanner

Question

无论怎么修改都会报错，请帮我看一看怎么改，谢谢！
代码如下：
import java.util.Scanner

public class Rectangle {
double width;
double heigth;
double area;

double computArea() {
    area = width*heigth;
    return area;
}
public static void main(String[] args) {
    Scanner rectangle=new Scanner(System.in);
    System.out.println("输入矩形的宽（按Enter键确认）：");
    double width=rectangle.nextDouble();
    System.out.println("输入矩形的高（按Enter键确认）：");
    double heigth=rectangle.nextDouble();
     System.out.println("矩形的宽:"+width);
     System.out.println("矩形的高:"+heigth);
     System.out.println("矩形的面积:"+rectangle.computArea(width,heigth));
     
}

}

Answer 1

public class Rectangle {
    private static double width;
    private static double heigth;
    private static double area;
    public static void main(String[] args) {
        Scanner rectangle=new Scanner(System.in);
        System.out.println("输入矩形的宽（按Enter键确认）：");
        width=rectangle.nextDouble();
        System.out.println("输入矩形的高（按Enter键确认）：");
        heigth=rectangle.nextDouble();
        System.out.println("矩形的宽:"+width);
        System.out.println("矩形的高:"+heigth);
        System.out.println("矩形的面积:"+computArea());
        rectangle.close();

    }

    private static Double computArea() {
        area = width*heigth;
        return area;
    }
}