java - JFormattedTextField 值与我设置的不同

Question

我正在使用 JFormattedTextField 在文本字段中显示百分比值，如下所示：

NumberFormat percentDisplayFormat = NumberFormat.getPercentInstance();
NumberFormat editFormat = NumberFormat.getNumberInstance();

percentDisplayFormat.setMinimumFractionDigits(2);

NumberFormatter percentEditFormatter = new NumberFormatter(editFormat);

JFormattedTextField jftfPercentage = new JFormattedTextField(new DefaultFormatterFactory(new NumberFormatter(percentDisplayFormat), new NumberFormatter(percentDisplayFormat), percentEditFormatter));

jftfPercentage.setBounds(113, 95, 236, 21);
jftfPercentage.setName("JftfPercentage");

并设置如下值：

jftfPercentage.setValue(<someDoubleValue>);

现在，假设我将值设置为 80，那么它显示的值是 8000%。
但是，每当我点击该字段时，它只显示为 80。

有人可以帮助我显示我们设置的相同值吗？提前致谢

Answer 1

我在这里得到了问题。在内部，默认数字格式化程序在显示时将给定值乘以 100。（如果我们使用 PercentInstance）

NumberFormat percentDisplayFormat = NumberFormat.getPercentInstance();
NumberFormat editFormat = NumberFormat.getNumberInstance();

percentDisplayFormat.setMinimumFractionDigits(2);

NumberFormatter percentEditFormatter = new NumberFormatter(editFormat);

// This was the new change that I have made
NumberFormatter percentDisplayFormatter = new NumberFormatter(percentDisplayFormat)
{
    @Override
    public String valueToString(Object o) throws ParseException
    {
        Double number = null;
        if (o != null)
        {
            number = Double.valueOf(o.toString());
            number /= 100;
        }
        // In super class, it multiplies the number by 100. So as we are dividing the number by 100 here. In super level it will become the same value that we have given        
        return super.valueToString(number);
    }
};

JFormattedTextField jftfPercentage = new JFormattedTextField(new DefaultFormatterFactory(percentDisplayFormatter, percentDisplayFormatter, percentEditFormatter));

jftfPercentage.setBounds(113, 95, 236, 21);
jftfPercentage.setName("JftfPercentage");