JavaFx TextField焦点丢失格式化

Question

我正在使用Scene Builder和jdk8创建Java Fx应用程序。我有各种文本字段来查找数字输入。一旦文本框失去焦点，我希望能够格式化这些文本框。

我一直在使用DecimalFormat df = new DecimalFormat（“###### 0.00”）;总计文本字段的结果，但不在输入文本字段上。

任何帮助非常感谢。

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)); 

类实现的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);