我有一個ChangeListener
,當觸發時,調用findGPA()
方法。如何將StringProperty綁定到BigDecimal?
private void findGPA(){
GPA = gradeCre/sum;
decGPA = new BigDecimal(GPA);
decGPA = decGPA.setScale(2, RoundingMode.CEILING);
System.out.println("Your average GPA is: " + decGPA);
}
的BigDecimal
被初始化爲如下:
private BigDecimal decGPA = BigDecimal.ZERO;
在initialize()
方法:
SubmitStageBorderPane.setBottom(AddStackCircle());
的呼叫:
private StackPane AddStackCircle(){
StackPane stackCircle = new StackPane();
StringProperty gpa = new SimpleStringProperty("");
gpa.bind(new SimpleStringProperty(decGPA.toString()));
Text avgGPA = createText("Your semester GPA is: " + gpa);
Circle resultCircle = createCircle(avgGPA);
stackCircle.getStyleClass().add("stackCircle");
stackCircle.getChildren().addAll(resultCircle, avgGPA);
return stackCircle;
}
private Circle createCircle(Text avgGPA){
Circle resultCircle = new Circle();
resultCircle.setFill(Color.GREEN);
resultCircle.setStroke(Color.GREY);
resultCircle.setStrokeWidth(3);
resultCircle.setRadius(getWidth(avgGPA)/2 + 10);
return resultCircle;
}
private Text createText(String text){
Text avgGPA = new Text(text);
avgGPA.setBoundsType(TextBoundsType.VISUAL);
avgGPA.getStyleClass().add("avgGPA");
return avgGPA;
}
然而,當我運行它,它贊成使用以下標籤文本Your semester GPA is: StringProperty[bound, invalid]
,即使decGPA
的值發生更改也不會改變。
的[不同性質的雙向綁定](可能的複製https://stackoverflow.com/questions/14138082 /不同屬性的雙向綁定) – Flown