如何将数字传递给TextField JavaFX？ [英] How to pass number to TextField JavaFX?

问题描述

我正在使用简单计算器，用户在 TextField 中输入两个数字，结果显示在结果 TextField 。我使用 Double.parseDouble 从输入TextFields获取文本并对其应用操作。但我无法将其传递给第三个输入字段。我试图将 double 结果转换回String但它不起作用。如何简单地将数字传递给TextField？

I am working on simple calculator, where users input two numbers in TextField and the result is displayed in result TextField. I used Double.parseDouble to get the text from input TextFields and apply the operation on it. But I am unable to pass it to third input field. I tried to cast back the double result to String but It didn't work. How can I simply pass number to TextField?

double num1 = Double.parseDouble(numberInput1.getText());
double num2 = Double.parseDouble(numberInput2.getText());
double resultV = (num1 + num2);

resultInput.setText(resultV);

最后一行不起作用且格式不同。

The last line is not working and as the format is different.

推荐答案

没有方法 TextField.setText（double）

尝试

resultInput.setText("" + resultV);

但我想你真正想要的是将结果很好地格式化为两位小数？

but I guess what you really want is for the result to be nicely formatted to maybe two decimal places?

尝试使用

resultInput.setText(String.format ("%6.2f", resultV));

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