Point3D class is a part of JavaFX. This class defines a 3-dimensional point in a 3D space. The Point3D class represents a 3D point by its x, y, z coordinates.

Constructor of the class is:

• Point3D(double x, double y, double z): Creates a Point3D objects using the specified coordinates.

Commonly Used Methods:

Below programs will illustrate the use of the Point3D class:

1. Java program to create a Point3D object and display its coordinates and find its distance from the origin: In this program we create a Point3D object named point3d_1 by passing its x, y, z coordinates as arguments. We get the x, y, z argument using the getX(), getY(), getZ() function and display it. We also calculate the distance of the point from the origin and also display it.

   
   

   
   
   

   // Java program to create a point 3D  // object and display its coordinates // and find its distance from origin import javafx.geometry.Point3D;    public class Point3D_1 {        // Main Method     public static void main(String args[])     {            // Create a point3D object         Point3D point3d_1 = new Point3D(20.0f, 50.0f, 70.0f);            double x, y, z;            // get the coordinates of the point         x = point3d_1.getX();         y = point3d_1.getY();         z = point3d_1.getZ();            // display the coordinates of the point         System.out.println("x coordinate = " + x                              + ", y coordinate = "                              + y + ", z coordinate = " + z);            // print its distance from origin         System.out.println("Distance From Origin = "                       + point3d_1.distance(0, 0, 0));     } }

   Output:

   
   
   
   

   x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
   Distance From Origin = 88.31760866327846
   




2. Java program to create 3 Point3D objects and display their coordinates and distance from the origin and check which of the 3 points are similar and their distances between two points: In this program we create 3 Point3D objects named point3d_1, point3d_2, point3d_3 by passing its x, y, z coordinates as arguments. we get the x, y, z argument using the getX(), getY(), getZ() function and display it. We also calculate the distance of the point from the origin and also display it for each of the three points. We also display whether any two points are equal or not using equals() function and also display the distance between two points using the distance function.

   
   

   
   
   

   // Java program to create 3 Point3D objects and  // display their coordinates and distance from  // origin and check which of the 3 points are  // similar and their distances between two points import javafx.geometry.Point3D;    public class Point3D_2 {        // Main Method     public static void main(String args[])     {            // create three point3D objects         Point3D point3d_1 = new Point3D(20.0f, 50.0f, 70.0f);         Point3D point3d_2 = new Point3D(20.0f, 50.0f, 70.0f);         Point3D point3d_3 = new Point3D(200.0f, 20.0f, 90.0f);            // display the coordinates of the 3 points         display(point3d_1);         display(point3d_2);         display(point3d_3);            // check whether any point is equal to other or not         System.out.println("Point 1 equals point 2 = "                         + point3d_1.equals(point3d_2));            System.out.println("Point 2 equals point 3 = "                         + point3d_2.equals(point3d_3));            System.out.println("Point 3 equals point 1 = "                          + point3d_3.equals(point3d_1));            // distance between two points         System.out.println("Distane between point 1 and point 2 = "                                    + point3d_1.distance(point3d_2));            System.out.println("Distane between point 2 and point 3 = "                                     + point3d_2.distance(point3d_3));            System.out.println("Distane between point 3 and point 1 = "                                    + point3d_3.distance(point3d_1));     }        // Display Method     public static void display(Point3D point3d)     {            double x, y, z;            // get the coordinates of the point         x = point3d.getX();         y = point3d.getY();         z = point3d.getZ();            // display the coordinates of the point         System.out.println("x coordinate = " + x                             + ", y coordinate = "                             + y + ", z coordinate = " + z);            // print its distance from origin         System.out.println("Distance From Origin = " +                              point3d.distance(0, 0, 0));     } }

   Output:

   x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
   Distance From Origin = 88.31760866327846
   x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
   Distance From Origin = 88.31760866327846
   x coordinate = 200.0, y coordinate = 20.0, z coordinate = 90.0
   Distance From Origin = 220.22715545545242
   Point 1 equals point 2 = true
   Point 2 equals point 3 = false
   Point 3 equals point 1 = false
   Distane between point 1 and point 2 = 0.0
   Distane between point 2 and point 3 = 183.5755975068582
   Distane between point 3 and point 1 = 183.5755975068582
   

Note: The above programs might not run in an online IDE. Please use an offline compiler.

Reference: https://docs.oracle.com/javafx/2/api/javafx/geometry/Point3D.html

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