JavaFX：如何從GridPane內的動態創建的TextField的值來平均平均值？

Question

我創建在JavaFX中，我創建了兩個GridPanes應用dynimically具有相同的行數，都GridPanes具有文本字段和下面有這樣一個按鈕：

用戶可以寫任何數量的GridPane A的動態創建的TextField這樣的：

我要的是，當用戶將按下提交按鈕的程序應該算目前各行中值的總和，然後將每個RO瓦特與全GridPane的TextField的總和計算出的和，並顯示結果在根據GridPane甲行位置例如GridPane甲行0的計算結果第二GridPane的TextField的應顯示在GridPane乙行0是這樣的：

I」米這樣GridPane甲創建GridPane：

public static GridPane tableA(int rows, Button button){ 
    GridPane table = new GridPane(); 

    rowValidationBindings = new BooleanBinding[rows]; 

    for(int i=0; i<rows; i++){ 
     TextField textField1 = new TextField(); 
     textField1.setAlignment(Pos.CENTER); 
     TextField textField2 = new TextField(); 
     textField2.setAlignment(Pos.CENTER); 
     TextField textField3 = new TextField(); 
     textField3.setAlignment(Pos.CENTER); 

     rowValidationBindings[i] = Bindings.createBooleanBinding(
      () -> { 
       if (textField1.getText().matches("\\d+") && 
        textField2.getText().matches("\\d+") && 
        textField1.getText().matches("\\d+") { 
        return true ; 
       } else { 
        return false ; 
       } 
      }, textField1.textProperty(), textField2.textProperty(), textField3.textProperty() 
     ); 

     table.add(textField1, 0, i+1); 
     table.add(textField2, 1, i+1); 
     table.add(textField3, 2, i+1); 
    } 

    button.disableProperty().bind(Bindings.createBooleanBinding(
     () -> ! Stream.of(rowValidationBindings).allMatch(BooleanBinding::get), 
     rowValidationBindings 
    )); 

    return table; 
} 

GridPane乙

public static GridPane tableB(int rows, Button button){ 
    GridPane table = new GridPane(); 

    rowValidationBindings = new BooleanBinding[rows]; 

    for(int i=0; i<rows; i++){ 
     TextField textField1 = new TextField(); 
     textField1.setAlignment(Pos.CENTER); 

     rowValidationBindings[i] = Bindings.createBooleanBinding(
      () -> { 
       if (textField1.getText().matches("\\d+") { 
        return true ; 
       } else { 
        return false ; 
       } 
      }, textField1.textProperty() 
     ); 

     table.add(textField1, 0, i+1); 
    } 

    button.disableProperty().bind(Bindings.createBooleanBinding(
    () -> ! Stream.of(rowValidationBindings).allMatch(BooleanBinding::get), 
    rowValidationBindings 
)); 
    return table; 
} 

方法噸

public static Node getComponent (int row, int column, GridPane table) { 
     for (Node component : table.getChildren()) { // loop through every node in the table 
      if(GridPane.getRowIndex(component) == row && 
          GridPane.getColumnIndex(component) == column) { 
       return component; 
      } 
     } 

     return null; 
    } 

按鈕點擊執行：：○在具體的行和列從表中返回組件

@FXML 
    private void calcul() { 
     GridPane table = (GridPane) anchorPane.getChildren().get(0); 
     for(int i=1 ; i<=comboxBox.getValue(); i++){ 
      String text0 = ((TextField) getComponent (i, 0, table)).getText(); 
      String text1 = ((TextField) getComponent (i, 1, table)).getText(); 
      String text2 = ((TextField) getComponent (i, 2, table)).getText(); 

       System.out.println(text0 + " " + text1 + " " + text2); 
       System.out.println("Next Row"); 

    } 

Answer 1

我覺得你的做法是在實現這一正確的方式，你可以試試這個，當按鈕被點擊（即換行動監聽器）（注意。未經測試）：

// pass the numberOfRows which is comboxBox.getValue() 
// pass tableA and tableB. 
// fetch the numbers (in a String format) from all TextFields at every row in tableA 
// and caclulate the result after parsing the Strings from each as double values 
// set the result in the corresponding TextField in tableB in every loop 
private void calcul(GridePane tableA, GridPane tableB, int numberOfRows) { 
    double result = 0; 
    for(int i=0 ; i<numberOfRows; i++){ 
     result = (Double.parseDouble(((TextField) getComponent (i, 0, tableA)).getText()) + 
        Double.parseDouble(((TextField) getComponent (i, 1, tableA)).getText()) + 
        Double.parseDouble(((TextField) getComponent (i, 2, tableA)).getText())) 
              /(numberOfRows*3); 

     ((TextField) getComponent (i, 0, tableB)).setText(String.valueOf(result)); 

    } 
} 

UPDATE

後OP在下面的評論提供更多的解釋，一些調整上面的代碼需要：

// pass the numberOfRows which is comboxBox.getValue() 
// pass tableA and tableB. 
private void calcul(GridePane tableA, GridPane tableB, int numberOfRows) { 
    // first get the total and store it in a variable 
    double total =0; 
    for(Node node : tableA){ 
     if(node instanceof TextField){ 
     total += Double.parseDouble(((TextField)node).getText()); 
     } 
    } 

    // fetch the numbers (in a String format) from all TextFields at every row in tableA 
    // and calculate the average after parsing the Strings from each as double values 
    // set the average in the corresponding TextField in tableB in every loop 
    double average = 0; 
    for(int i=0 ; i<numberOfRows; i++){ 
     average = (Double.parseDouble(((TextField) getComponent (i, 0, tableA)).getText()) + 
        Double.parseDouble(((TextField) getComponent (i, 1, tableA)).getText()) + 
        Double.parseDouble(((TextField) getComponent (i, 2, tableA)).getText())) 
             /(total); 

     ((TextField) getComponent (i, 0, tableB)).setText(String.valueOf(average)); 

    } 
}