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在tableView eventHandler上，當用戶檢測到F1時，它會打開一個帶有comboBox和兩個按鈕的第二個階段。如果用戶從組合框中選擇了一個條目並且擊中了第一個按鈕，那麼它將所選var的值寫入文件，關閉第二個階段並返回到第一個階段，在那裏打開上面的文件進行讀取，獲取變量並將其存儲在用戶按下F1時激活的表格行的第一列中。部分：階段，讀/寫文件，更新tableview所有工作正常，但當更改代碼，我嘗試應用服務（任務）第二階段不顯示。換句話說，兩個階段是不合適的。javaFX：在任務中打開第二個階段，等待它關閉，然後繼續第一階段。
// INSIDE mainContoller
table.setOnKeyPressed(new EventHandler<KeyEvent>() {
public void handle(KeyEvent t) {
TablePosition firstCell = table.getSelectionModel().getSelectedCells().get(0);
//Integer col = firstCell.getColumn();
//Integer row = firstCell.getRow();
col = firstCell.getColumn();
row = firstCell.getRow();
//System.out.println(firstCell.getColumn());
if (t.getCode() == KeyCode.F1){
System.out.println("F1 pressed");
Service<Void> service = new Service<Void>() {
@Override
protected Task<Void> createTask() {
return new Task<Void>() {
@Override
protected Void call() throws Exception {
//Do Long running work here<<<
System.out.println("In task 1");
Parent root1 = null;
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Customer.fxml"));
try {
root1 = (Parent) fxmlLoader.load();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Stage stage = new Stage();
stage.initModality(Modality.APPLICATION_MODAL);
stage.initStyle(StageStyle.UNDECORATED);
stage.setTitle("ABC");
System.out.println("In task 2");
stage.setScene(new Scene(root1));
stage.show();
System.out.println("In task 3");
return null;
}
};
}
@Override
protected void succeeded() {
//Called when finished without exception
System.out.println("OnSucceeded");
TextFileReadWrite getCustomer = new TextFileReadWrite();
String cusName = "";
try {
cusName = getCustomer.readFromFile("C:\\gasoum\\YannaKSIA\\ForitiTimologisi\\tempFiles\\tempCustomer.txt");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Col:" + col + " Row: "+ row);
checkCusFile = true;
oList.get(row).cusEponymia = cusName;
table.refresh();
}
};
service.start(); // starts Thread
}
}
});
// CustomerContreller.java file
package application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.stage.Stage;
public class CustomerController extends Thread{
public String customerName;
@FXML Button customerChoseButton;
@FXML Button customerExitButton;
@FXML ComboBox cusComboBox ;
public String cus;
public void initialize() {
cus = "Testing";
cusComboBox.getItems().addAll(
"Customer 1",
"Customer 2",`
"Customer 3"
);
//AUTO COMPLETE COMBOBOX
new AutoCompleteComboBoxListener<>(cusComboBox);
customerChoseButton.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
// WRITE SELECTED CUSTOMER INTO FILE
TextFileReadWrite wC = new TextFileReadWrite();
String selectedCus = (String) cusComboBox.getSelectionModel().getSelectedItem().toString();
wC.writeToFile(selectedCus, "C:\\gasoum\\YannaKSIA\\ForitiTimologisi\\tempFiles\\tempCustomer.txt");
customerChoseButton.getScene().getWindow().hide();
}
});
customerExitButton.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
customerExitButton.getScene().getWindow().hide();
}
});
}
}
// TextFileReadWrite.java
package application;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class TextFileReadWrite {
public TextFileReadWrite(){
}
public void writeToFile(String xcontent, String xfname){
try {
File file = new File(xfname);
// if file doesnt exists, then create it
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
bw.write(xcontent);
bw.close();
//System.out.println("Done");
} catch (IOException e) {
e.printStackTrace();
}
}
public String readFromFile(String xfname) throws IOException{
BufferedReader br = new BufferedReader(new FileReader(xfname));
try {
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append(System.lineSeparator());
line = br.readLine();
}
String everything = sb.toString();
return everything;
} finally {
br.close();
}
}
}
從您的問題標題看，問題看起來類似於：[我可以暫停後臺任務/服務？]（http://stackoverflow.com/questions/14941084/javafx2-can-i-pause-a-background-任務服務），但是從問題文本和代碼（我不是很瞭解並且由於衆多的正切原因而顯得不正確），我真的不知道這是否是你想要做的。 – jewelsea