Java实验十一

第一题

// 线程同步
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 同步线程
 * @author ASUS
 */
public class Exercise30_04 {
    static Value value = new Value();
    public static void main(String[] args){
        ExecutorService executor = Executors.newFixedThreadPool(1000);
        for(int i = 1; i <= 1000; i++){
            executor.execute(new AddOne());
        }
        executor.shutdown();
        System.out.print("最终结果：" + value.sum); 
    }
    public static class AddOne implements Runnable{
        @Override
        public void run() {
            value.addValue();
        }    
    }
    public static class Value{
        Integer sum = 0;
        
        public synchronized void addValue(){
            int newValue = sum + 1;
            sum = new Integer(newValue);
        }
    }
}

第二题

public class Exercise15_28 extends Application{
    @Override
    public void start(Stage stage){
        // 创建一个圆
        Circle c = new Circle(250,135,125,Color.WHITE);
        c.setStroke(Color.BLACK);
        // 创建三个按钮
        Button bt1 = new Button("Pause");
        Button bt2 = new Button("Resume");
        Button bt3 = new Button("Reverse");
        // 创建一个HBox
        HBox hbox = new HBox();
        hbox.setAlignment(Pos.CENTER);
        hbox.setSpacing(20); 
        hbox.getChildren().addAll(bt1,bt2,bt3);
        // 创建四个Arc
        Arc[] a = new Arc[4];
        for(int i = 0; i < 4; i++){
            a[i] = new Arc(250,135,120,120,90*i,30);
            a[i].setStroke(Color.BLACK); 
            a[i].setFill(Color.BLACK); 
            a[i].setType(ArcType.ROUND);
        }
        // 创建时间轴动画,顺时针动画与逆时针动画
        Timeline timeline1 = new Timeline();
        timeline1.setCycleCount(Timeline.INDEFINITE);
        Timeline timeline2 = new Timeline();
        timeline2.setCycleCount(Timeline.INDEFINITE);
        Duration duration = Duration.millis(1000);
        KeyValue[] kv1 = new KeyValue[4];
        KeyFrame[] kf1 = new KeyFrame[4];
        KeyValue[] kv2 = new KeyValue[4];
        KeyFrame[] kf2 = new KeyFrame[4];
        for(int j = 0; j < 4; j++){
            kv1[j] = new KeyValue(a[j].startAngleProperty(), 360+a[j].getStartAngle());
            kf1[j] = new KeyFrame(duration,kv1);
            timeline1.getKeyFrames().add(kf1[j]);
            kv2[j] = new KeyValue(a[j].startAngleProperty(), -360+a[j].getStartAngle());
            kf2[j] = new KeyFrame(duration,kv2);
            timeline2.getKeyFrames().add(kf2[j]);
        }
        new Thread(new Runnable(){

            @Override
            public void run() {
                bt2.setOnMouseClicked(e->{
                timeline2.pause();
                timeline1.play();
                });
            }
        }).start();
        
        new Thread(new Runnable(){

            @Override
            public void run() {
                bt1.setOnMouseClicked(e->{
                timeline1.pause();
                timeline2.pause();
                });
            }
        }).start();
        new Thread(new Runnable(){

            @Override
            public void run() {
                bt3.setOnMouseClicked(e->{
                timeline1.pause();
                timeline2.play();
                });
            }
        }).start();
        // 创建一个Pane
        Pane pa = new Pane();
        pa.getChildren().addAll(c,a[0],a[1],a[2],a[3]);
        // 创建一个BorderPane
        BorderPane pane = new BorderPane();
        pane.setCenter(pa); 
        pane.setBottom(hbox); 
        Scene scene = new Scene(pane,500,320);
        stage.setTitle("Exercise16_03");
        stage.setScene(scene);
        stage.show();
    }
    
    /**
     * 
     * @param args
     */
    public static void main(String[] args){
        Application.launch(args); 
    }
}