// Drawable.java

              // Declare the Drawable interface
              interface Drawable {
                  // Declare the abstract method "draw" that classes implementing this interface must provide
                  void draw();
              } 
              
              // Circle.java
              
              // Import necessary libraries for graphics and user interface
              import java.awt.*;
              import javax.swing.*;
              
              // Declare the Circle class, which implements the Drawable interface
              class Circle implements Drawable {
                  // Implement the "draw" method required by the Drawable interface
                  public void draw() {
                      // Create a new JFrame for displaying the circle
                      JFrame frame = new JFrame();
                      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                      frame.setSize(400, 400);
                      frame.setVisible(true);
              
                      // Create a JPanel for custom drawing
                      JPanel panel = new JPanel() {
                          @Override
                          protected void paintComponent(Graphics g) {
                              super.paintComponent(g);
                              // Set the drawing color to red and fill an oval
                              g.setColor(Color.RED);
                              g.fillOval(100, 100, 200, 200);
                          }
                      };
              
                      // Add the panel to the frame
                      frame.add(panel);
                  }
              }
              // Rectangle.java
              
              // Import necessary libraries for graphics and user interface
              import java.awt.*;
              import javax.swing.*;
              
              // Declare the Rectangle class, which implements the Drawable interface
              class Rectangle implements Drawable {
                  // Implement the "draw" method required by the Drawable interface
                  public void draw() {
                      // Create a new JFrame for displaying the rectangle
                      JFrame frame = new JFrame();
                      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                      frame.setSize(400, 400);
                      frame.setVisible(true);
              
                      // Create a JPanel for custom drawing
                      JPanel panel = new JPanel() {
                          @Override
                          protected void paintComponent(Graphics g) {
                              super.paintComponent(g);
                              // Set the drawing color to blue and fill a rectangle
                              g.setColor(Color.BLUE);
                              g.fillRect(100, 100, 200, 200);
                          }
                      };
              
                      // Add the panel to the frame
                      frame.add(panel);
                  }
              } 
              // Triangle.java
              
              // Import necessary libraries for graphics and user interface
              import java.awt.*;
              import javax.swing.*;
              
              // Declare the Triangle class, which implements the Drawable interface
              class Triangle implements Drawable {
                  // Implement the "draw" method required by the Drawable interface
                  public void draw() {
                      // Create a new JFrame for displaying the triangle
                      JFrame frame = new JFrame();
                      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                      frame.setSize(400, 400);
                      frame.setVisible(true);
              
                      // Create a JPanel for custom drawing
                      JPanel panel = new JPanel() {
                          @Override
                          protected void paintComponent(Graphics g) {
                              super.paintComponent(g);
                              // Set the drawing color to green and fill a polygon
                              g.setColor(Color.GREEN);
                              int[] xPoints = {
                                  200,
                                  100,
                                  300
                              };
                              int[] yPoints = {
                                  100,
                                  300,
                                  300
                              };
                              g.fillPolygon(xPoints, yPoints, 3);
                          }
                      };
              
                      // Add the panel to the frame
                      frame.add(panel);
                  }
              }
              // Main.java
              
              // Import necessary libraries for graphics and user interface
              import java.awt.*;
              import javax.swing.*;
              
              // Declare the Main class
              class Interfaces_6 {
                  public static void main(String[] args) {
                      // Create instances of Drawable objects, which are Circle, Rectangle, and Triangle
                      Drawable circle = new Circle();
                      Drawable rectangle = new Rectangle();
                      Drawable triangle = new Triangle();
              
                      // Call the "draw" method to display each shape
                      circle.draw();
                      rectangle.draw();
                      triangle.draw();
                  }
              }