用户在文本字段Java Swing中输入时，屏蔽IP地址 [英] Mask the IP Address when the user enters in text field Java Swing

问题描述

我有一个JTextField可以容纳3个点的IP地址. 255.120.320.123.当用户输入此IP地址时，我想像 . . . 我指的是这个线程，如何将格式化程序JFormattedTextField定制为显示IP地址?

I have a JTextField to accommodate an ip address with 3 dots. 255.120.320.123. When the user enters this IP address, I want to mask it like ... I was referring this thread, How to custom formatter JFormattedTextField to display an IP address?

jFormattedTextField对我不起作用.谁能给我举一个带有3个可见点的jFormattedTextField示例?

jFormattedTextField did not work for me. Can anyone give me an example with jFormattedTextField with 3 dots visible?

还是我需要使用此线程中提到的4个jFomattedTextField/JPasswordField?

Or do I need to use 4 jFomattedTextField/JPasswordField as mentioned in this thread?

谢谢.

推荐答案

似乎您需要使用

Seems you need to use MaskFormatter ,for example:

try {
    MaskFormatter mf = new MaskFormatter("###.###.###.###");
    JFormattedTextField f = new JFormattedTextField(mf);
    add(f);
} catch (ParseException e) {
    e.printStackTrace();
}

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