如何在java swing中验证。 [英] How to validate in java swing.

问题描述

我正在开发一个Java Swing应用程序。



应用程序以一个表单结束，以获取客户的输入信息（姓名，姓氏，电子邮件，性别等） ）



我试图以一种方式验证文本字段，当应用程序启动时，焦点将放在第一个文本框（名字）上。我希望用户在输入有效名称（没有数字，标点符号等）之前无法离开包装盒。



不幸的是，即使在线查看之后，我无法找到验证这些盒子的解决方案。



行动计划：



焦点在第一个文本字段>>>除非输入有效输入，否则无法离开>>输出给用户的消息>>验证完成>>焦点设置在下一个字段>>等等。



帮助将不胜感激。



我的尝试：



i已经尝试过焦点丢失的监听器来处理它但是不能成功。

解决方案

如何编写焦点监听器（Java™教程>使用JFC / Swing创建GUI> ;编写事件监听器） [ ^ ]

I am developing a Java Swing Application.

The application ends with a form to take the customer's input information (name, last name, email, gender, etc)

I am trying to validate the text fields in a way that when the application is launched focus will go on the first text box (first name). I want the user to not be able to leave the box until they have entered a valid name (no numbers, punctuation and so on).

Unfortunately even after looking online, I am not able to find a solution to validating these boxes.

Action Plan:

Focus on first textfield >>> Unable to leave unless valid input is entered >> messages outputted to user >> validation completed >> focus set on next field >> and so on.

Help would be appreciated.

What I have tried:

i have tried focus lost listener to deal with it but could't succeed.

解决方案

How to Write a Focus Listener (The Java™ Tutorials > Creating a GUI With JFC/Swing > Writing Event Listeners)[^]

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