JavaFx TextField焦點丟失格式化

Question

我正在使用Scene Builder和jdk8創建Java Fx應用程序。我有各種文本字段來查找數字輸入。一旦文本框失去焦點，我希望能夠格式化這些文本框。

我一直在使用DecimalFormat df = new DecimalFormat（「###### 0.00」）;總計文本字段的結果，但不在輸入文本字段上。

任何幫助非常感謝。

Answer 1

TextField tf1=new TextField(); 
TextField tf2=new TextField(); 
TextField tf3=new TextField(); 

// add focus listener to all textFields 

tf1.focusedProperty().addListener(new TextFieldListener(tf1)); 
tf2.focusedProperty().addListener(new TextFieldListener(tf2)); 
tf3.focusedProperty().addListener(new TextFieldListener(tf3)); 

類實現的ChangeListener

class TextFieldListener implements ChangeListener<Boolean> { 
      private final TextField textField ; 
      TextFieldListener(TextField textField) { 
      this.textField = textField ; 
      } 
      @Override 
      public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) { 
      if(!newValue) // check if focus gained or lost 
      { 
       this.textField.setText(getFormattedText(this.textField.getText()); 
      } 
      } 

    public String getFormatedText(String str) 
    { 
      //return formated text 
    } 
} 

Answer 2

final ChangeListener<? super Boolean> focusListener = (o,ov,nv)->{ 
    if(!nv){ 
     TextField tf = (TextField)((ReadOnlyBooleanPropertyBase)o).getBean(); 
     //put your code here 
    } 
} 
tf1.focusedProperty().addListener(focusListener); 
tf2.focusedProperty().addListener(focusListener); 
tf3.focusedProperty().addListener(focusListener);