JavaFX | Polyline with examples

Polyline is part of the JavaFX library. Polyline is a set of connected points. Though Polyline is almost similar to the Polygon class, the only difference is polygon forms a closed area whereas the Polyline can form both closed and open area. Also, Polyline class extends shape class.

Constructors for class are:

1. Polyline():Creates an empty instance of Polyline.
2. Polyline(double… points): creates a new instance of polyline with given points

Commonly used methods:

method	explanation
getPoints()	gets the points of the polyline segments
toString()	Returns a string representation of this Polyline object.

Below programs illustrate the use of Polyline:

1. Program to create an open area of connected segments using polyline: This program creates a Polyline indicated by the name polyline( the coordinates of the points of the line segments to create an open area). The Polyline will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a Group is created, and the polyline is attached. The group is attached to the scene. Finally, the show() method is called to display the final results.

   // Java Program to create a open area
   // of connected segments using polyline
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.Button;
   import javafx.scene.layout.*;
   import javafx.scene.paint.Color;
   import javafx.scene.shape.Polyline;
   import javafx.scene.control.*;
   import javafx.stage.Stage;
   import javafx.scene.Group;
   public class Polyline_0 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
           // set title for the stage
           stage.setTitle("creating Polyline");
   
           // points
           double points[] = { 20.0d, 20.0d, 40.0d, 240.0d, 60.0d,
                             180.0d, 80.0d, 200.0d, 100.0d, 90.0d };
   
           // create a polyline
           Polyline polyline = new Polyline(points);
   
           // create a Group
           Group group = new Group(polyline);
   
           // create a scene
           Scene scene = new Scene(group, 500, 300);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       public static void main(String args[])
       {
           // launch the application
           launch(args);
       }
   }

   Output:
   

2. Program to create a closed area of connected segments using polyline: This program creates a Polyline indicated by the name polyline( the coordinates of the points of the line segments to create a closed area). The Polyline will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a Group is created, and the polyline is attached. The group is attached to the scene. Finally, the show() method is called to display the final results.

   // Java Program to create a closed area
   // of connected segments using polyline
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.control.Button;
   import javafx.scene.layout.*;
   import javafx.scene.paint.Color;
   import javafx.scene.shape.Polyline;
   import javafx.scene.control.*;
   import javafx.stage.Stage;
   import javafx.scene.Group;
   public class Polyline_1 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
           // set title for the stage
           stage.setTitle("creating Polyline");
   
           // points
           double points[] = { 20.0d, 20.0d, 40.0d, 240.0d, 60.0d,
                180.0d, 80.0d, 200.0d, 100.0d, 90.0d, 20.0d, 20.0d };
   
           // create a polyline
           Polyline polyline = new Polyline(points);
   
           // create a Group
           Group group = new Group(polyline);
   
           // create a scene
           Scene scene = new Scene(group, 500, 300);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       public static void main(String args[])
       {
           // launch the application
           launch(args);
       }
   }

   Output:
   

Note :The above programs might not run in an online IDE please use an offline converter.
Reference:https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/Polyline.html