added random color, random area and so on

src/main/java/core/basesyntax/Circle.java

@@ -1,21 +1,23 @@
 package core.basesyntax;
 
-public class Circle implements Figure {
-    private String color;
+public class Circle extends Figure {
     private double radius;
 
     public Circle(String color, double radius) {
-        this.color = color;
+        super(color);
         this.radius = radius;
     }
 
     @Override
-public double getArea() {
+    public double getArea() {
         return Math.PI * radius * radius;
     }
 
+    @Override
     public void draw() {
-        System.out.println("Figure circle,area " + getArea() + "sq.units,radius:"
-                + radius + "units, color:" + color);
+        System.out.println("Figure: circle, area: " + getArea()
+                + " sq. units, radius: " + radius + " units, color: " + getColor());
     }
+
+    // Інші методи, специфічні для кола
 }

src/main/java/core/basesyntax/ColorSupplier.java

@@ -5,7 +5,7 @@
 public class ColorSupplier {
     private static final String[] COLORS = {"red", "blue", "green", "yellow", "purple", "orange"};
 
-    public String getRandomColor() {
+    public String getRandomColor(){
         Random random = new Random();
         int index = random.nextInt(COLORS.length);
         return COLORS[index];

src/main/java/core/basesyntax/Figure.java

@@ -1,8 +1,16 @@
 package core.basesyntax;
 
-public interface Figure {
+public abstract class Figure {
+    private String color;
 
-    double getArea();
+    public Figure(String color) {
+        this.color = color;
+    }
 
-    void draw();
-}
+    public String getColor() {
+        return color;
+    }
+
+    public abstract double getArea();
+    public abstract void draw();
+}

src/main/java/core/basesyntax/IsoscelesTrapezoid.java

@@ -1,13 +1,13 @@
 package core.basesyntax;
 
-public class IsoscelesTrapezoid implements Figure {
+public class IsoscelesTrapezoid extends Figure {
     private String color;
     private double upperBase;
     private double lowerBase;
     private double height;
 
     public IsoscelesTrapezoid(String color, double upperBase, double lowerBase, double height) {
-        this.color = color;
+        super(color);
         this.upperBase = upperBase;
         this.lowerBase = lowerBase;
         this.height = height;

src/main/java/core/basesyntax/Rectangle.java

@@ -1,12 +1,11 @@
 package core.basesyntax;
 
-public class Rectangle implements Figure {
-    private String color;
+public class Rectangle extends Figure {
     private double length;
     private double width;
 
     public Rectangle(String color, double length, double width) {
-        this.color = color;
+        super(color);
         this.length = length;
         this.width = width;
     }
@@ -18,7 +17,8 @@ public double getArea() {
 
     @Override
     public void draw() {
-        System.out.println("Figure rectangle,area:" + getArea() + "sq.units,length:"
-                + length + "units,width:" + width + "units,color:" + color);
+        System.out.println("Figure: rectangle, area: " + getArea()
+                + " sq. units, length: " + length
+                + " units, width: " + width + " units, color: " + getColor());
     }
 }

src/main/java/core/basesyntax/RightTriangle.java

@@ -1,12 +1,12 @@
 package core.basesyntax;
 
-public class RightTriangle implements Figure {
+public class RightTriangle extends Figure {
     private String color;
     private double base;
     private double height;
 
     public RightTriangle(String color, double base, double height) {
-        this.color = color;
+        super(color);
         this.base = base;
         this.height = height;
 

src/main/java/core/basesyntax/Square.java

@@ -1,11 +1,11 @@
 package core.basesyntax;
 
-public class Square implements Figure {
+public class Square extends Figure {
     private String color;
     private double sideLength;
 
     public Square(String string, double sideLength) {
-        this.color = string;
+        super(string);
         this.sideLength = sideLength;
     }