maskformatter Java数字和空格

Question

I used maskformatter for my jtextfield. 我为我的jtextfield使用maskformatter。

It works like a charm but the problem is that I cant delete the number in the jtextfield. 它的工作原理就像一种魅力，但问题是我无法删除jtextfield中的数字。

f = new MaskFormatter( "#" );
f.setValidCharacters("123456789");

How can I include the space character so that I can accept space and digits from 1-9? 如何包含空格字符，以便可以接受1-9之间的空格和数字？

Answer 1

f = new MaskFormatter( "*" );
f.setValidCharacters("123456789 ");

accept all characters and include space.. 接受所有字符并包含空格。

This works for me 这对我有用