java-1
需求：写一个求矩形面积的java程序，要求有主类(Example1)和一个矩形类(Rect)，方法(getArea)写在Rect类中，主类用于输入、调用、输出。 code： import java.util.Scanner ; public class Rect { double width ; double height ; double getArea (){ return width * height ; } } class Example1{ public static void main (String args[]){ Rect rectangle ; rectangle = new Rect() ; //Rect rectangle = new Rect(); Scanner reader = new Scanner(System. in ) ; System. out .println( "input the width : " ) ; rectangle. width = reader.nextDouble() ; System. out .println( "input the height : " ) ; rectangle. height = reader.nextDouble() ; double area = rectangle.getArea() ; System. out .print( "The area of the rectangle is " +area) ; } }