未知大小的TextFields陣列JavaFX

我正在嘗試使用 JavaFX 構建一個 GUI 堆疊。我應該問用戶他想要堆疊的多少元素。然后，TextField 的數量應根據用戶輸入的大小出現在右側螢屏上。我一直在嘗試一整天，但仍然沒有任何效果。

到目前為止，這是我一直在嘗試做的事情。解決 TextFields 陣列問題后，我應該完成我的程式。

`

public class StackGUI extends Application{
    private Button push, pop, peek, empty, create, build ;
    private TextField[] data ;
    private TextField size, numberText ;
    private Label sizeLabel, numberLabel ;
    private int sizeOfStack ;
    String sizeDialog = "0" ;
    
    
    @Override
    public void start(Stage primaryStage){

        BorderPane border = new BorderPane();
        
        // Buttons
        push = new Button("PUSH");
        pop = new Button("POP");
        peek = new Button("PEEK");
        empty = new Button("EMPTY");
        push.setPrefSize(150, 50);
        pop.setPrefSize(150, 50);
        peek.setPrefSize(150, 50);
        empty.setPrefSize(150, 50);
        FlowPane bottom = new FlowPane();
        bottom.setHgap(10);
        bottom.setAlignment(Pos.CENTER);
        bottom.getChildren().addAll(push, pop, peek, empty) ;
        border.setBottom(bottom);
        
        
        //Center
        VBox center = new VBox(5);
        center.setAlignment(Pos.CENTER);
        size = new TextField();
        size.setMaxWidth(200);
        size.setEditable(false);
        numberLabel = new Label("Enter a numbet: ");
        numberText = new TextField();
        numberText.setMaxWidth(200) ;
        //sizeLabel = new Label("How many numbers? ");
        create = new Button("Create a Stack");
        build = new Button("Build the Stack");
        create.setPrefWidth(200);
        build.setPrefWidth(200);
        build.setDisable(true);
        center.getChildren().addAll(create, size, build) ;
        border.setCenter(center);
        
        
        //Stack TextFields --> right
         
        create.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                TextInputDialog input = new TextInputDialog();
                
                input.setContentText("How many Numbers");
                input.setHeaderText("Size Of Stack");
                input.setTitle("Stack");
                input.showAndWait();
                size.setAlignment(Pos.CENTER);
                size.setText("Number Of Elements: "   input.getEditor().getText());
                sizeDialog = input.getEditor().getText() ;
                build.setDisable(false);
            }
        });
        
        sizeOfStack = Integer.parseInt(sizeDialog) ;
        data = new TextField[sizeOfStack] ;
        HBox right = new HBox(5);
        build.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                create.setDisable(true);
                numberText.setPromptText("Enter a number to push");
                center.getChildren().addAll(numberLabel, numberText) ;
                for(int i=0 ; i<sizeOfStack ; i  ){
                    TextField text = new TextField();
                    data[i] = text ;
                    right.getChildren().add(data[i]) ;
                }
            }
        });
        border.setRight(right);
        
        //Scene
        Scene scene = new Scene(border, 800, 400) ;
        primaryStage.setScene(scene);
        primaryStage.setTitle("Stack");
        primaryStage.show();

    }

    
    public static void main(String[] args) {
        launch(args); 
    }
    
}

`

uj5u.com熱心網友回復：

正如@James_D 指出的那樣，您需要sizeOfStack = Integer.parseInt(sizeDialog);在build.setOnAction. 你還需要搬家data = new TextField[sizeOfStack] ;。

我也移動了HBox right = new HBox(sizeOfStack);and border.setRight(right);，但這可能不是必需的。

代碼：

build.setOnAction((ActionEvent event) - > {
    sizeOfStack = Integer.parseInt(sizeDialog);
    data = new TextField[sizeOfStack];

    create.setDisable(true);
    numberText.setPromptText("Enter a number to push");
    center.getChildren().addAll(numberLabel, numberText);

    HBox right = new HBox(sizeOfStack);
    for (int i = 0; i < sizeOfStack; i  ) {
        TextField text = new TextField();
        data[i] = text;
        right.getChildren().add(data[i]);
    }
    border.setRight(right);
});

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