Question

我有两个JavaFX类，DialogPane.java和Main.java。代码如下：

DialogPane

package application;

import java.util.Optional;

import javafx.geometry.Pos;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Dialog;
import javafx.scene.control.ButtonBar.ButtonData;
import javafx.scene.layout.HBox;
import javafx.stage.Modality;

    public class DialogPane extends Dialog {





        @SuppressWarnings("null")
        public  DialogPane(){
            String string = null;
            initModality(Modality.APPLICATION_MODAL);
    //      initOwner( primaryStage );
    //      HBox buttonHb = new HBox(10);
    //      Button textbtn = new Button("Premi");
    //      buttonHb.setAlignment(Pos.CENTER);
    //      buttonHb.getChildren().addAll(textbtn);
    //      ButtonType buttonTypeOne = new ButtonType("Prova");
    //      ButtonType loginButtonType = new ButtonType("OK", ButtonData.OK_DONE);  
    //      getDialogPane().getButtonTypes().addAll(buttonTypeOne);
            ButtonType okbutton = new ButtonType("OK", ButtonData.OK_DONE);
            ButtonType cancelbutton = new ButtonType("Cancel", ButtonData.CANCEL_CLOSE);
            getDialogPane().getButtonTypes().addAll(okbutton,cancelbutton);
            Optional<ButtonType> result = null;
            result = showAndWait();
            if ((result.get()) == okbutton) {

                string ="ok";

            }


        }

主要

public class Main extends Application {

// a lot of code that doesn't matter now
Button test = new Button("Test");
HBox testbox = new HBox(40);
        test.setAlignment(Pos.TOP_CENTER);
        test.setStyle("-fx-font-size: 15pt;");
testbox.getChildren().add(test);

test.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent e) {
                    DialogPane finestra = new DialogPane();


                        }
        });

}

在DialogPane中我使用字符串＆＃34; string＆＃34;我想在其他课堂上使用。我的意思是，当我按下okbutton时，字符串初始化为＆＃34; ok＆＃34;，我想在Main类中使用＆＃34; ok。怎么做？

Answer 1

而不是扩展Dialog的类，只需创建一个创建对话框然后返回字符串的方法。

像这样。

public class DialogPane(){
  public static string our_return;

  public static string createDialog(){
    Dialog dialog=new Dialog();
    /*Create your dialog from here and add your buttons and so on*/

   //then set our_return string using your button
     if ((dialog.result.get()) == okbutton) {

            our_string ="ok";

        }

 return our_return;
}


}

然后在你的主要

test.setOnAction(new EventHandler<ActionEvent>() {
        public void handle(ActionEvent e) {
                String finestra =DialogPane.createDialog();


                    }
    });

从JavaFX中的Dialog返回字符串

1 个答案: