我的multiThread应用程序出了问题。 当我从＆＃34; Vehicles＆＃34;中调用drive（）方法时我希望对象（图片）向左移动。这种机制有效，但遗憾的是我遇到了问题。有时，当我运行应用程序时，会发生其中一个对象停止移动。有时它是一些对象。通常，在几分之一秒后，图像再次向左移动。这种行为是不可重复的，不幸的是，现在小型车辆发生故障并立即站立并不罕见。也许你们其中一个人知道如何解决这个问题，以便车辆一直平稳运行？如果我在标记的位置放置一个代码（System.out.println）并且我想将文本显示到控制台，那么这个机制可以正常工作，只有当图像被移动时才会中断。
头等舱：
import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
import java.util.concurrent.locks.ReentrantLock;
public class Main extends Application {
ReentrantLock lock = new ReentrantLock();
StackPane root = new StackPane();
Time time;
Vehicles vehicles;
SmallVehicle1 smallVehicle1;
Text t1 = new Text();
Text t2 = new Text();
Image excavatorImage = new Image("resources/excavator.png");
// Image smallVehicleImage = new Image("resources/small.png");
Image largeVehicleImage = new Image("resources/large.png");
ImageView imageOfExcavator1 = new ImageView();
ImageView imageOfExcavator2 = new ImageView();
ImageView imageOfExcavator3 = new ImageView();
ImageView imageOfExcavator4 = new ImageView();
ImageView imageOfExcavator5 = new ImageView();
ImageView imageOfSmallVehicle1 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle2 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle3 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle4 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle5 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle6 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle7 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle8 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle9 = new ImageView(new Image("resources/small.png"));
ImageView imageOfSmallVehicle10 = new ImageView(new
Image("resources/small.png"));
ImageView imageOfLargeVehicle1 = new ImageView();
ImageView imageOfLargeVehicle2 = new ImageView();
ImageView imageOfLargeVehicle3 = new ImageView();
ImageView imageOfLargeVehicle4 = new ImageView();
ImageView imageOfLargeVehicle5 = new ImageView();
@Override
public void start(Stage primaryStage) throws Exception {
root.setStyle("-fx-background-color: #00FF00");
primaryStage.setTitle("My App");
primaryStage.setScene(new Scene(root, 1000, 800));
primaryStage.show();
lock.lock();
checkTime();
lock.unlock();
createExcavators();
createSmallVehicle();
moveVehicles();
primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent t) {
Platform.exit();
System.exit(0);
}
});
}
public static void main(String[] args) {
launch(args);
}
public void moveVehicles(){
vehicles = new Vehicles(this);
vehicles.start();
}
public void checkTime() {
time = new Time(this);
time.start();
root.getChildren().add(t1);
root.getChildren().add(t2);
}
public void updateTime(int hour, int minute, int second) {
String time = hour + ":" + minute + ":" + second;
t1.setTranslateX(-450);
t1.setTranslateY(-380);
Platform.runLater(() -> t1.setText(time));
}
public void takeBreak() {
Platform.runLater(() -> t2.setText("Now we have got break!"));
}
public void stopBreak() {
takeBreak();
t2.setTranslateY(-1000);
t2.setTranslateX(-1000);
}
public void startBreak() {
takeBreak();
t2.setTranslateY(0);
t2.setTranslateX(0);
}
public void createExcavators() {
imageOfExcavator1.setImage(excavatorImage);
imageOfExcavator2.setImage(excavatorImage);
imageOfExcavator3.setImage(excavatorImage);
imageOfExcavator4.setImage(excavatorImage);
imageOfExcavator5.setImage(excavatorImage);
root.getChildren().addAll(imageOfExcavator1, imageOfExcavator2, imageOfExcavator3, imageOfExcavator4, imageOfExcavator5);
}
public void moveExcavator1(double x, double y) {
imageOfExcavator1.setTranslateX(x);
imageOfExcavator1.setTranslateY(y);
}
public void moveExcavator2(double x, double y) {
imageOfExcavator2.setTranslateX(x);
imageOfExcavator2.setTranslateY(y);
}
public void moveExcavator3(double x, double y) {
imageOfExcavator3.setTranslateX(x);
imageOfExcavator3.setTranslateY(y);
}
public void moveExcavator4(double x, double y) {
imageOfExcavator4.setTranslateX(x);
imageOfExcavator4.setTranslateY(y);
}
public void moveExcavator5(double x, double y) {
imageOfExcavator5.setTranslateX(x);
imageOfExcavator5.setTranslateY(y);
}
public void createSmallVehicle() {
root.getChildren().addAll(imageOfSmallVehicle1, imageOfSmallVehicle2, imageOfSmallVehicle3, imageOfSmallVehicle4, imageOfSmallVehicle5, imageOfSmallVehicle6, imageOfSmallVehicle7, imageOfSmallVehicle8, imageOfSmallVehicle9, imageOfSmallVehicle10);
}
public void moveSmallVehicle1(double x, double y) {
imageOfSmallVehicle1.setTranslateX(x);
imageOfSmallVehicle1.setTranslateY(y);
}
public void moveSmallVehicle2(double x, double y) {
imageOfSmallVehicle2.setTranslateX(x);
imageOfSmallVehicle2.setTranslateY(y);
}
public void moveSmallVehicle3(double x, double y) {
imageOfSmallVehicle3.setTranslateX(x);
imageOfSmallVehicle3.setTranslateY(y);
}
public void moveSmallVehicle4(double x, double y) {
imageOfSmallVehicle4.setTranslateX(x);
imageOfSmallVehicle4.setTranslateY(y);
}
public void moveSmallVehicle5(double x, double y) {
imageOfSmallVehicle5.setTranslateX(x);
imageOfSmallVehicle5.setTranslateY(y);
}
public void moveSmallVehicle6(double x, double y) {
imageOfSmallVehicle6.setTranslateX(x);
imageOfSmallVehicle6.setTranslateY(y);
}
public void moveSmallVehicle7(double x, double y) {
imageOfSmallVehicle7.setTranslateX(x);
imageOfSmallVehicle7.setTranslateY(y);
}
public void moveSmallVehicle8(double x, double y) {
imageOfSmallVehicle8.setTranslateX(x);
imageOfSmallVehicle8.setTranslateY(y);
}
public void moveSmallVehicle9(double x, double y) {
imageOfSmallVehicle9.setTranslateX(x);
imageOfSmallVehicle9.setTranslateY(y);
}
public void moveSmallVehicle10(double x, double y) {
imageOfSmallVehicle10.setTranslateX(x);
imageOfSmallVehicle10.setTranslateY(y);
}
public void createLargeVehicle() {
imageOfLargeVehicle1.setImage(largeVehicleImage);
imageOfLargeVehicle2.setImage(largeVehicleImage);
imageOfLargeVehicle3.setImage(largeVehicleImage);
imageOfLargeVehicle4.setImage(largeVehicleImage);
imageOfLargeVehicle5.setImage(largeVehicleImage);
root.getChildren().addAll(imageOfLargeVehicle1, imageOfLargeVehicle2, imageOfLargeVehicle3, imageOfLargeVehicle4, imageOfLargeVehicle5);
}
public void moveLargeVehicle1(double x, double y) {
imageOfLargeVehicle1.setTranslateX(x);
imageOfLargeVehicle1.setTranslateY(y);
}
public void moveLargeVehicle2(double x, double y) {
imageOfLargeVehicle2.setTranslateX(x);
imageOfLargeVehicle2.setTranslateY(y);
}
public void moveLargeVehicle3(double x, double y) {
imageOfLargeVehicle3.setTranslateX(x);
imageOfLargeVehicle3.setTranslateY(y);
}
public void moveLargeVehicle4(double x, double y) {
imageOfLargeVehicle4.setTranslateX(x);
imageOfLargeVehicle4.setTranslateY(y);
}
public void moveLargeVehicle5(double x, double y) {
imageOfLargeVehicle5.setTranslateX(x);
imageOfLargeVehicle5.setTranslateY(y);
}
}
第二课：
public class Time extends Thread {
public int hour = 0;
public int minute = 0;
public int second = 0;
Main main;
Excavators excavators = new Excavators(main);
Time(Main main) {
this.main = main;
}
public void run() {
for (; ; ) {
try {
second = second + 2;
if (second == 60) {
second = 0;
minute++;
}
if (minute == 60) {
minute = 0;
hour++;
}
if (hour == 24) {
hour = 0;
}
if (hour == 0 && minute == 5 && second == 0) {
}
setTime(hour, minute, second);
Thread.sleep(20);
} catch (InterruptedException e) {
}
}
}
public void setTime(int h, int m, int s) {
Excavators excavators = new Excavators(main);
excavators.start(h, m, s);
System.out.println(h + ":" + m + ":" + s);
main.updateTime(h, m, s);
}
}
第三课：
public class Excavators extends Thread {
Main main;
int x = 0;
int y = 0;
Excavators(Main main) {
this.main = main;
}
public void start(int h, int m, int s){
getTime(h, m, s);
}
public void setCoordinates1(double x, double y) {
main.moveExcavator1(x, y);
}
public void setCoordinates2(double x, double y) {
main.moveExcavator2(x, y);
}
public void setCoordinates3(double x, double y) {
main.moveExcavator3(x, y);
}
public void setCoordinates4(double x, double y) {
main.moveExcavator4(x, y);
}
public void setCoordinates5(double x, double y) {
main.moveExcavator5(x, y);
}
public void setCoordinates() {
setCoordinates1(-400, y);
setCoordinates2(-200, y);
setCoordinates3(0, y);
setCoordinates4(200, y);
setCoordinates5(400, y);
}
public void moveDown() {
y = 0;
setCoordinates();
main.stopBreak();
}
public void moveUp() {
y = -200;
setCoordinates();
main.startBreak();
}
public void stay() {
y = 0;
setCoordinates();
main.stopBreak();
}
public void getTime(int h, int m, int s) {
if (h == 0 && m >= 0 && m < 5) {
moveDown();
} else if (h == 0 && m >= 5 && m < 15) {
moveUp();
} else if (h == 0 && m >= 15 && m < 30) {
moveDown();
} else if(h == 0 && m >= 30 && m < 45){
moveUp();
}else if(h == 0 && m >= 45 && m < 60){
moveDown();
}else if(h == 1 && m >= 0 && m < 15){
moveUp();
}else{
stay();
}
}
}
第四课::
public class Vehicles extends Thread{
Main main;
double x = 100;
double y = 120;
SmallVehicle1 smallVehicle1;
Vehicles(Main main){
this.main = main;
}
public synchronized void run(){
for (; ; ) {
try{
x = x - 5;
drive(x, y);
Thread.sleep(40);
}catch (InterruptedException ex){
}
}
}
public void reservation(){
}
public void startLoading(){
}
public void drive(double x, double y){
/*
HERE IS THE PROBLEM
Objects are moving but sometimes they are stopped.
*/
main.imageOfSmallVehicle1.setTranslateX(x);
main.imageOfSmallVehicle2.setTranslateX(x + 200);
main.imageOfSmallVehicle3.setTranslateX(x + 400);
main.imageOfSmallVehicle4.setTranslateX(x + 600);
main.imageOfSmallVehicle5.setTranslateX(x + 800);
main.imageOfSmallVehicle6.setTranslateX(x + 1000);
main.imageOfSmallVehicle7.setTranslateX(x + 1200);
main.imageOfSmallVehicle8.setTranslateX(x + 1400);
main.imageOfSmallVehicle9.setTranslateX(x + 1600);
main.imageOfSmallVehicle10.setTranslateX(x + 1800);
}
public void checkReservation(){
}
public void stopLoading(){
}
public void smallVehicle(){
}
public void largeVehicle(){
}
}