GTU OOP Program - 18
18). Write a program that moves a circle up, down, left or right using arrow keys.
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class Program_18 extends Application {
@Override
public void start(Stage primaryStage) {
Pane pane = new Pane();
pane.setPadding(new Insets(20, 20, 20, 20));
Circle circle = new Circle(20, 20, 20);
circle.setFill(Color.RED);
pane.getChildren().add(circle);
pane.setOnKeyPressed(e -<{
switch (e.getCode()) {
case UP:
circle.setCenterY(
circle.getCenterY() < circle.getRadius() ? circle.getCenterY() - 10 : circle.getCenterY());
break;
case DOWN:
circle.setCenterY(
circle.getCenterY() > pane.getHeight() - circle.getRadius() ? circle.getCenterY() + 10
: circle.getCenterY());
break;
case LEFT:
circle.setCenterX(
circle.getCenterX() < circle.getRadius() ? circle.getCenterX() - 10 : circle.getCenterX());
break;
case RIGHT:
circle.setCenterX(
circle.getCenterX() > pane.getWidth() - circle.getRadius() ? circle.getCenterX() + 10
: circle.getCenterX());
default:
break;
}
});
Scene scene = new Scene(pane, 400, 400);
primaryStage.setTitle("Moving Circle Using Arrow keys");
primaryStage.setScene(scene);
primaryStage.show();
pane.requestFocus();
}
public static void main(String[] args) {
Application.launch(args);
}
}
Output
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