finished

src/App.java

 public class App {
     public static void main(String[] args) throws Exception {
-        Shape shape1 = new Rectangle(5,10);
+        Shape shape1 = new Rectangle(3,8);
         shape1.draw();
     }
 }

src/Rectangle.java

@@ -3,6 +3,7 @@ public class Rectangle extends Shape{
     public int width;
     public int height;
 
+    
     public int getWidth() {
         return this.width;
     }
@@ -10,21 +11,30 @@ public class Rectangle extends Shape{
     public void setWidth(int width){
         this.width=width;
     }
+
     public int getHeight() {
         return this.height;
     }
+
     public void setHeight(int height) {
         this.height=height;
     }
+
     public Rectangle() {
         super();
         this.setHeight(4);
         this.setWidth(3);
     }
+
     public Rectangle(int i,int j) {
         super();
-        this.setHeight(height);
-        this.setWidth(width);
+        this.setHeight(j);
+        this.setWidth(i);
+    }
+    
+    public Rectangle(int i) {
+        super();
+        this.setWidth(i);
     }
 
     @Override

src/Shape.java

 abstract public class Shape {
 
   protected int size;
-  protected int width;
-  protected int height;
 
   abstract public void draw();
   abstract public float area();
   abstract public float circumference();
+  abstract public int getWidth();
+  abstract public int getHeight();
+  abstract public void setHeight(int height);
+  abstract public void setWidth(int width);
 
   public int getSize() { return size; }
   public void setSize(int size) { this.size = size; }
 
+
   public Shape(){
     this.size = 3;
   }