Witam,
Chciałem stworzyć metodę która będzie zmieniać tekst w TextArea. Jeżeli korzystam z metody (super.test()) w klasie w której ją stworzyłem to wszystko działa, lecz napotykam problem w momencie którym klasa dziedziczy tą metodę. Po wywołaniu tej funkcji zwracany jest NullPointerException.
Klasa Controler
public class Controller implements Initializable {
@FXML
TextField tf1;
@FXML
TextField tf2;
@FXML private Button button;
@FXML
public TextArea logarea;
public ArrayList<String> stringArrayList= new ArrayList<>();
public ObservableList<String> observableArray = FXCollections.observableArrayList(stringArrayList);
@Override
public void initialize(URL location, ResourceBundle resources) {
observableArray.addListener(new ListChangeListener<String>() {
@Override
public void onChanged(Change<? extends String> c) {
System.out.println("Changed on " + c);
if (c.next()) {
System.out.println(c.getFrom());
}
}
});
System.out.println("Initialize");
}
@FXML
public void start(){
System.out.println("Button");
System.out.println(tf1.getText()+tf2.getText());
long temp=Long.parseLong(tf2.getText());
Runnable runnable = new CheckFiles(tf1.getText(), temp * 1000);
Thread thread = new Thread (runnable);
thread.start();
//Runnable runnable1 = monitor();
test();
}
@FXML
public void end() {
System.exit(1);
}
** public void test()**{
logarea.setText(stringArrayList.toString());
}
Klasa która dziedziczy funcję
public class CheckFiles extends Controller implements Runnable {
public CheckFiles() {
System.out.println("Utworzono wątek");
}
private Boolean isValid=true;
private String Path=null;
private long Interval=300000;
public CheckFiles(String path,long interval) {
System.out.println("Utworzono wątek");
Interval=interval;
File file = new File(path);
if(file.isDirectory()){
isValid=true;
Path=path;
}
else{
isValid=false;
}
}
@Override
public void run() {
while(true) {
System.out.println("Watek "+Thread.currentThread());
try {
if(isValid==true) {
String[] first=listfiles();
Thread.sleep(Interval);
System.out.println("Sleep minął");
String [] second=listfiles();
System.out.println(Arrays.equals(first,second));
if(!Arrays.equals(first,second)){
Platform.runLater(
() -> {
try {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("notification.fxml"));
Parent root1 = fxmlLoader.load();
Stage stage = new Stage();
stage.setScene(new Scene(root1));
stage.setTitle("Błąd");
stage.show();
}catch (Exception e) {
e.printStackTrace();
}
}
);
}
else{
super.stringArrayList.add(Path);
**super.test();**
}
}
}
catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private String[] listfiles(){
File file = new File(Path);
ArrayList<String> arrayList= new ArrayList<>();
File[] files= file.listFiles();
//String[] paths= new String[files.length];
for(int i=0;i<files.length;i++){
//paths[i]=files[i].getPath();
//System.out.println(paths[i]);
arrayList.add(files[i].getPath());
if(files[i].isDirectory()){
File[] temp=files[i].listFiles();
for(int x=0;x<temp.length;x++){
arrayList.add(temp[x].getPath());
}
}
}
String[] paths = new String[arrayList.size()];
for(int y=0;y<arrayList.size();y++){
paths[y]=arrayList.get(y);
//System.out.println(paths[y]);
}
//System.out.println(files.toString());
return paths;
}
