JAVAFx TextField验证十进制值 [英] JAVAFx TextField Validation Decimal value

问题描述

我尝试限制十进制数字的文本字段，我已经找到了整数验证的解决方案这里，但问题是我无法转换以下代码的十进制数，如324.23,4.3,4,2,10.43 。 （只允许1个小数点）。

I am try to restrict the textfield for decimal numbers, I already found the solution for integer number validation here, but the problem is that I am not able to convert the following code for decimal numbers, something like 324.23, 4.3, 4, 2, 10.43. (only 1 decimal point allow).

 vendorList_textField_remaining.textProperty().addListener(new ChangeListener<String>() {
        @Override
        public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
            if (!newValue.matches("\\d*")) {
                vendorList_textField_remaining.setText(newValue.replaceAll("[^\\d||.]", ""));
            }
        }
    });

我也在寻找其他解决方案。
谢谢。

I am also looking for alternative solutions. Thanks.

推荐答案

我遇到了同样的情况。我想我找到了这个问题的解决方案。正则表达式必须由一个新的替换，并由setText稍作更改。目前它运作良好。代码如下：

I have met the same situation. I think I have found the a solution to this question. The regex has to been replaced by a new one and a little changes by setText. For now it works well. The code follows:

vendorList_textField_remaining.textProperty().addListener(new ChangeListener<String>() {
        @Override
        public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
            if (!newValue.matches("\\d*(\\.\\d*)?")) {
                vendorList_textField_remaining.setText(oldValue);
            }
        }
    });

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