calculate area of rectangle using class in java

1// calculate area of rectangle using class in java
2import java.io.*;
3class RectangleShape 
4{
5   int length, breadth; 
6   void setValue(int l, int b) 
7   { 
8       length = l; 
9       breadth = b; 
10   }
11   // get area of rectangle
12   int findArea() 
13   { 
14       return (length * breadth); 
15   }
16}
17public class RectangleAreaDemo
18{
19   public static void main(String[] args)
20   {
21      RectangleJava obj = new RectangleJava(); 
22      obj.setValue(10, 5); 
23      System.out.println("Area of rectangle: " + obj.findArea());
24   }
25}

1import java.util.Scanner;
2public class RectangleArea
3{
4   public static void main(String[] args)
5   {
6      Scanner sc = new Scanner(System.in);
7      System.out.println("Please enter length of rectangle: ");
8      double length = sc.nextDouble();
9      System.out.println("Please enter width of rectangle: ");
10      double width = sc.nextDouble();
11      double area = length * width;
12      System.out.println("Area of rectangle is: " + area);
13      sc.close();
14   }
15}