Java实验(19) 交通灯

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.RadioButton;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.geometry.Pos;
import javafx.scene.layout.HBox;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
public class TrafficLights extends Application {

@Override
public void start(Stage primaryStage) {
lights lightpane=new lights();
BorderPane borderpane=new BorderPane();
HBox hbox=new HBox();
StackPane pane=new StackPane();
RadioButton rbred=new RadioButton("Red");
RadioButton rbyellow=new RadioButton("Yellow");
RadioButton rbgreen=new RadioButton("Green");
hbox.getChildren().addAll(rbred,rbyellow,rbgreen);
hbox.setAlignment(Pos.CENTER);

ToggleGroup group=new  ToggleGroup();
rbred.setToggleGroup(group);
rbyellow.setToggleGroup(group);
rbgreen.setToggleGroup(group);

pane.getChildren().add(lightpane);
pane.setAlignment(Pos.CENTER);
borderpane.setCenter(pane);
borderpane.setBottom(hbox);

rbred.setOnAction(e->{
if(rbred.isSelected()){
lightpane.light1();
}
});
rbyellow.setOnAction(e->{
if(rbyellow.isSelected()){
lightpane.light2();
}
});
rbgreen.setOnAction(e->{
if(rbgreen.isSelected()){
lightpane.light3();
}
});

Scene scene = new Scene(borderpane,200,200);
primaryStage.setTitle("TrafficLights");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
class lights extends VBox{
public final double side1=30;//长
public final double side2=90;//宽
public final double radius=15; //灯半径
private Circle circle1=new Circle(radius);
private Circle circle2=new Circle(radius);
private Circle circle3=new Circle(radius);
public lights(){
circle1.setFill(Color.RED);
circle1.setStroke(Color.BLACK);
circle2.setFill(Color.WHITE);
circle2.setStroke(Color.BLACK);
circle3.setFill(Color.WHITE);
circle3.setStroke(Color.BLACK);
getChildren().addAll(circle1,circle2,circle3);
setStyle("-fx-border-color:black");
setMaxSize(side1,side2);
}
public void light1(){
circle1.setFill(Color.RED);
circle2.setFill(Color.WHITE);
circle3.setFill(Color.WHITE);
}
public void light2(){
circle1.setFill(Color.WHITE);
circle2.setFill(Color.YELLOW);
circle3.setFill(Color.WHITE);
}
public void light3(){
circle1.setFill(Color.WHITE);
circle2.setFill(Color.WHITE);
circle3.setFill(Color.GREEN);
}
}