问题描述
我约束工厂中剩余物品的数量.
I am bind the value of number of items left in the factory.
private int item;
private SimpleIntegerProperty itemProperty = new SimpleIntegerProperty();
private SimpleIntegerProperty remainingItem = new Simple IntegerProperty();
private SimpleIntegerProperty soldItem = new Simple IntegerProperty();
在构造函数中
this.item = item;
itemProperty.set(item);
soldItem.set(0);
remainingItem.bind(soldItem.subtract(item).multiply(-1));
//itemProperty.bind((soldItem.subtract(item).multiply(-1));
在fxml文件中
<Text text="${controller.factory.remainingProperty.get()}">
当我尝试绑定itemProperty时，它给出无效的当我尝试使用get方法显示剩余属性ReadOnlyIntegerProperty时，它将在主类中抛出 EXCEPTION .
when I try to bind itemProperty it give invalidwhen I try to display with remainingProperty ReadOnlyIntegerProperty with get method,it throws EXCEPTION in the main class.
我正在尝试从 商品 中减去商品的数量并显示它.
I am trying to subtract the number of item from itemand display it.
推荐答案
不是方法调用；他们有不同的语法.在这里，假设在控制器中定义了适当的方法(remainingItemProperty())的适当的factory属性，则应使用
Expression bindings are not method calls; they have a different syntax. Here, assuming there is an appropriate factory property in the controller with the appropriate method defined (remainingItemProperty()), you should use
<Text text="${controller.factory.remainingItem}">
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