Question

如何使按钮事件在按钮所在的文本域中写入输出在hbox中，另一个在文本域中，因为我使用的是borderpane。在动作事件结束时，按钮应在文本字段中写入选择的文件签名这个问题的解决方案是什么？

public class Filrsystemencryption extends Application 
{

private HBox getHBox() 
{  
 HBox hbButtons = new HBox(15);
 Button btnimport = new Button("import");
TextField textfieldd = new TextField ();
  btnimport.setOnAction((event) ->
   {



  btnimport.setOnAction(new EventHandler<ActionEvent>() 
  {

        @Override
        public void handle(ActionEvent event) {

 JButton open = new JButton();
 JFileChooser fc = new JFileChooser();
fc.setCurrentDirectory(new java.io.File("C:/Users/hannah/Desktop"));
fc.setDialogTitle("choose a file");
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
if (fc.showOpenDialog(open) == JFileChooser.APPROVE_OPTION){
  textfieldd.setText("file chosen");
}
        }

    });

 Button btnDelete = new Button("Remove");
 TextField textfield = new TextField ();

 final ComboBox ComboBox = new ComboBox();
    ComboBox.getItems().addAll(
        "Encrypt",
        "Decrypt"   
    );

Label label = new Label("password");
hbButtons.setSpacing(30);
hbButtons.setPadding(new Insets(10, 20, 30, 20)); 
hbButtons.getChildren().addAll(btnimport, btnDelete, 
label,textfield,ComboBox); 
  return hbButtons ;
}


  @Override
  public void start(Stage primaryStage) {


   BorderPane pane = new BorderPane();
   pane.setTop(getHBox());
   pane.setCenter(getHBoxx());


primaryStage.setTitle("File system encryption");
Scene scene = new Scene(pane, 600, 600);
primaryStage.setScene(scene);
primaryStage.show();
}   
  private TextField getHBoxx() {

 TextField textfieldd = new TextField ();
 textfieldd.setPrefWidth(400);
 textfieldd.setPrefHeight(200);
 return textfieldd;    
   }

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    launch(args);
  }

  }

Answer 1

如果不真正需要在JavaFX中使用Swing类，则只会导致两个平台的主线程出现问题。最好将FileChooser用于文件和目录（例如本例）DirectoryChooser：

btnimport.setOnAction(evt -> {
    DirectoryChooser dirChooser = new DirectoryChooser();
    dirChooser.setInitialDirectory(new java.io.File("C:/Users/hannah/Desktop"));
    dirChooser.setTitle("choose a file");

    File choice = dirChooser.showDialog(btnimport.getScene().getWindow());

    if (choice != null) {
        // dialog not aborted
        textfieldd.setText("file chosen");
    }
});

如何使按钮事件在文本字段中写入输出

1 个答案: