import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Exercise16_25 extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
TextField tfCar1 = new TextField();
TextField tfCar2 = new TextField();
TextField tfCar3 = new TextField();
TextField tfCar4 = new TextField();
tfCar1.setPrefColumnCount(2);
tfCar2.setPrefColumnCount(2);
tfCar3.setPrefColumnCount(2);
tfCar4.setPrefColumnCount(2);
HBox hBox = new HBox(5);
hBox.setAlignment(Pos.CENTER);
hBox.getChildren().addAll(new Label("Car 1: "), tfCar1,
new Label("Car 2: "), tfCar2, new Label("Car 3: "), tfCar3,
new Label("Car 4: "), tfCar4);
VBox vBox = new VBox(5);
CarPane car1 = new CarPane();
CarPane car2 = new CarPane();
CarPane car3 = new CarPane();
CarPane car4 = new CarPane();
vBox.getChildren().addAll(car1, car2, car3, car4);
BorderPane pane = new BorderPane();
pane.setTop(hBox);
pane.setCenter(vBox);
// Create a scene and place it in the stage
Scene scene = new Scene(pane, 400, 200);
primaryStage.setTitle("Exercise16_25"); // Set the stage title
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage
tfCar1.setOnAction(e -> car1.setSpeed(
Integer.parseInt(tfCar1.getText())));
tfCar2.setOnAction(e -> car2.setSpeed(
Integer.parseInt(tfCar2.getText())));
tfCar3.setOnAction(e -> car3.setSpeed(
Integer.parseInt(tfCar3.getText())));
tfCar4.setOnAction(e -> car4.setSpeed(
Integer.parseInt(tfCar4.getText())));
car1.widthProperty().addListener(e -> car1.setW(car1.getWidth()));
car2.widthProperty().addListener(e -> car2.setW(car2.getWidth()));
car3.widthProperty().addListener(e -> car3.setW(car3.getWidth()));
car4.widthProperty().addListener(e -> car4.setW(car4.getWidth()));
}
/**
* The main method is only needed for the IDE with limited
* JavaFX support. Not needed for running from the command line.
*/
public static void main(String[] args) {
launch(args);
}
}
class CarPane extends Pane {
private double w = 200;
private double h = 40;
private double baseX = 0;
private double baseY = h;
private Circle c1 = new Circle(baseX + 10 + 5, baseY - 10 + 5, 5);
private Circle c2 = new Circle(baseX + 30 + 5, baseY - 10 + 5, 5);
private Rectangle carBody = new Rectangle(baseX, baseY - 20, 50, 10);
private Polygon carTop = new Polygon(baseX + 10, baseY - 20,
baseX + 20, baseY - 30, baseX + 30, baseY - 30,
baseX + 40, baseY - 20);
private int speed = 50;
KeyFrame kf = new KeyFrame(Duration.millis(150 - speed), e -> move());
Timeline animation = new Timeline(
new KeyFrame(Duration.millis(150 - speed), e -> move()));
public void setSpeed(int speed) {
animation.setRate(speed);
}
public CarPane() {
this.setStyle("-fx-border-color: black");
carBody.setFill(Color.GREEN);
carTop.setFill(Color.RED);
this.getChildren().addAll(c1, c2, carBody, carTop);
animation.setCycleCount(Timeline.INDEFINITE);
animation.play(); // Start animation
setOnMousePressed(e -> {
animation.pause();
});
setOnMouseReleased(e -> {
animation.play();
});
requestFocus();
setOnKeyPressed(e -> {
if (e.getCode() == KeyCode.UP) {
animation.setRate(animation.getRate() + 1);
} else if (e.getCode() == KeyCode.DOWN) {
animation.setRate(animation.getRate() - 1);
}
});
}
public void move() {
if (baseX > w) {
baseX = -20;
} else {
baseX += 1;
}
setValues();
}
public void setValues() {
c1.setCenterX(baseX + 10 + 5);
c1.setCenterY(baseY - 10 + 5);
c2.setCenterX(baseX + 30 + 5);
c2.setCenterY(baseY - 10 + 5);
carBody.setX(baseX);
carBody.setY(baseY - 20);
carTop.getPoints().clear();
carTop.getPoints().addAll(baseX + 10, baseY - 20,
baseX + 20, baseY - 30, baseX + 30, baseY - 30,
baseX + 40, baseY - 20);
}
public void setW(double w) {
this.w = w;
setValues();
}
public void setH(double h) {
this.h = h;
baseY = h;
setValues();
}
}
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Exercise16_20 extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
Time time = new Time();
Text text = new Text("00:00:00");
Timeline animation = new Timeline(
new KeyFrame(Duration.millis(1000), e -> {
time.increase();
text.setText(time.toString());
}));
animation.setCycleCount(Timeline.INDEFINITE);
HBox hBox = new HBox(5);
Button btStart = new Button("Start");
Button btClear = new Button("Clear");
hBox.getChildren().addAll(btStart, btClear);
hBox.setAlignment(Pos.CENTER);
btStart.setOnAction(e -> {
if (btStart.getText().equals("Start")) {
btStart.setText("Pause");
animation.play();
}
else if (btStart.getText().equals("Pause")) {
btStart.setText("Resume");
animation.pause();
}
else if (btStart.getText().equals("Resume")) {
btStart.setText("Pause");
animation.play();
}
});
btClear.setOnAction(e -> {
text.setText("00:00:00");
animation.pause();
btStart.setText("Start");
});
text.setFont(Font.font("Times", 35));
BorderPane pane = new BorderPane();
pane.setBottom(hBox);
pane.setCenter(text);
// Create a scene and place it in the stage
Scene scene = new Scene(pane, 200, 100);
primaryStage.setTitle("Exercise16_20"); // Set the stage title
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage
}
/**
* The main method is only needed for the IDE with limited
* JavaFX support. Not needed for running from the command line.
*/
public static void main(String[] args) {
launch(args);
}
static class Time {
int value = 0;
int getSecond() {
return value % 60;
}
int getMinute() {
return (value / 60) % 60;
}
int getHour() {
return value / 3600;
}
void reset() {
value = 0;
}
void increase() {
value++;
}
@Override
public String toString() {
return getTwoDigitString(getHour()) + ":" + getTwoDigitString(getMinute())
+ ":" + getTwoDigitString(getSecond());
}
static String getTwoDigitString(int v) {
if (v < 10)
return "0" + v;
else
return "" + v;
}
}
}
