当我运行 Rectangle.java 时,我可以获得矩形中输入的长度和宽度,但是当我尝试使用 getter 计算面积/周长时,结果为零我尝试添加和删除 setter,在 getArea 和 getPerimeter 中放入 getter/setter 方法,但似乎没有任何效果//Code provided by the teacher as a template Rectangle temp = new Rectangle(); temp.print(); System.out.println(); temp.setLength(2.5); temp.setWidth(3.0); //Consider how your rectangle will change after setting the length and width to specific values. temp.print(); System.out.println(); Rectangle r = new Rectangle(3.5,2); r.print();//My Classpublic class Rectangle { private static double length; private static double width; private static double perimeter; private static double area; public Rectangle(double length, double width) { setLength(length); setWidth(width); } public Rectangle() { } public static double getLength() { return length; } public static void setLength(double length) { Rectangle.length = length; } public static double getWidth() { return width; } public static void setWidth(double width) { Rectangle.width = width; } public static double getPerimeter(double length, double width) { return 2*width+2*length; } public static double getArea(double length, double width) { area= getLength()*getWidth(); return length*width; } public static String print() { String Rectangle = new String(); System.out.println("This rectangle has a length of "+length+" and a width of "+width); System.out.println("The area of the rectangle is: "+ area); System.out.println("The perimeter of the rectangle is: "+ perimeter); return Rectangle; }}没有错误消息。输出:该矩形的长度为 0.0,宽度为 0.0 矩形的面积为: 0.0 矩形的周长为: 0.0该矩形的长度为 2.5,宽度为 3.0 矩形的面积为: 0.0 矩形的周长为: 0.0该矩形的长度为 3.5,宽度为 2.0 矩形的面积为: 0.0 矩形的周长为: 0.0
1 回答
慕盖茨4494581
TA贡献1850条经验 获得超11个赞
您需要更改打印方法并调用周长和面积方法,以便这些变量获得所需的值
public static String print()
{
getPerimeter(length,width);
getArea(length,width);
String Rectangle = new String();
System.out.println("This rectangle has a length of "+length+" and a width of "+width);
System.out.println("The area of the rectangle is: "+ area);
System.out.println("The perimeter of the rectangle is: "+ perimeter);
return Rectangle;
}
我建议不要使用静态关键字,因为值不会绑定到对象
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