In java please Write a program that lets the user click on a

In java please,

Write a program that lets the user click on a pane to dynamically create and remove points (see Figure). When the user left-clicks the mouse (primary button), a point is created and displayed at the mouse point. The user can remove a point by pointing to it and right clicking the mouse (secondary button). Exercise allows the user to create/remove points dynamically.

Solution

import javafx.application.Application;

import javafx.collections.*;

import javafx.scene.*;

import javafx.stage.*;

public class MyApplication extends Application

{

Pane p = new Pane();

@Override

public void start(Stage ps)

{

double width = 400;

double height = 400;

p.setOnMouseClicked(e -> {

double x = e.getX();

double y = e.getY();

if(e.getButton() == MouseButton.PRIMARY) {

Circle c = drawPoint(x, y);

p.getChildren().add(c);

}

else if(e.getButton() == MouseButton.SECONDARY) {

removePoint(x, y);

}

});

Scene sc = new Scene(p,width, height);

ps.setScene(sc);

ps.setTitle(\"Click to draw circle\");

ps.show();

}

private Circle drawPoint(double a, double b)

{

Circle c= new Circle(a, b, 10, Color.TRANSPARENT);

c.setStroke(Color.BLACK);

return c;

}

private void removePoint(double a, double b)

{

ObservableList<Node> list = p.getChildren();

for(int i=list.size-1; i>=0; i--)

{

Node c= list.get(i);

if(c instance of Circle && c.contains(a,b))

{

pane.getChildren().remove(c);

break;

}

}

}

public static void main(String args[])

{

Application.launch(args);

}

}