Hitboxes of targets (Breakout) - javafx

Question

I got a JavaFX programm and I am not sure how I get the values to determine when the ball hits the target bricks, which are created in two for loops. I got my ball already moving on its own, but I do not have the hitbox of my paddle yet nor my targets. I would like to hear your ideas or startegies to make that work. Thanks for reading!
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.TilePane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.TextAlignment;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Breakout extends Application {
public static void main(String[] args) {
launch(args);
}
private static final int width = 700;
private static final int height = 900;
private boolean gameStarted;
private int rad = 10;
private int ballYPos = width / 2;
private int ballXPos = height / 2;
private int paddleXpos = width / 2;
private int paddleYpos = height - 100;
private int ballXSpeed = 2;
private int ballYSpeed = 2;
#Override
public void start(Stage primaryStage) throws Exception {
Canvas canvas = new Canvas(width, height);
GraphicsContext gc = canvas.getGraphicsContext2D();
Timeline t = new Timeline(new KeyFrame(Duration.millis(10), e -> run(gc)));
t.setCycleCount(Timeline.INDEFINITE);
canvas.setOnMouseClicked(e -> gameStarted = true);
//Kanvas mit KeyHandler, den ich verwenden möchte
canvas.setOnKeyPressed(e -> paddleXpos--);
primaryStage.setTitle("Breakout");
primaryStage.setScene(new Scene(new StackPane(canvas)));
primaryStage.show();
t.play();
}
public void run(GraphicsContext gc) {
gc.setFill(Color.GRAY);
gc.fillRect(0, 0, width, height);
gc.setFill(Color.GREEN);
gc.fillOval(ballXPos, ballYPos, rad, rad);
gc.setFill(Color.BLUE);
gc.fillRect(paddleXpos, paddleYpos, 50, 10);
gc.setFill(Color.RED);
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 5; j++) {
gc.fillRect(j * 130 + 55, i * 30 + 40, 75, 20);
}
}
if (gameStarted) {
ballYPos += ballYSpeed;
ballXPos += ballXSpeed;
if (ballXPos == width - rad || ballXPos == 0) {
ballXSpeed *= -1;
}
if (ballYPos == height - rad || ballYPos == 0) {
ballYSpeed *= -1;
}
}
}
}