0

在 NetBeans 中,如何设置无效字符以JFormattedTextField使其不允许:|、、[]

没关系,我想出了解决方案:

MaskFormatter formatter = null;

        try {
            //# - Any valid number, uses Character.isDigit.
            //' - Escape character, used to escape any of the special formatting characters.
            //U - Any character (Character.isLetter). All lowercase letters are mapped to upper case.
            //L - Any character (Character.isLetter). All upper case letters are mapped to lower case.
            //A - Any character or number (Character.isLetter or Character.isDigit)
            //? - Any character (Character.isLetter).
            //* - Anything.
            //H - Any hex character (0-9, a-f or A-F).
            formatter = new MaskFormatter("******************************");
            formatter.setInvalidCharacters("|[]");
        } catch (java.text.ParseException ex) {
        }

然后,在 GUI 上右键单击 JFormattedTextField,单击自定义代码,myFormattedTextField = new javax.swing.JFormattedTextField();选择自定义创建旁边的下拉框并将格式化程序添加到 JFormattedTextField,如下所示:myFormattedTextField = new javax.swing.JFormattedTextField(formatter);

希望有一天这会对其他人有所帮助。

4

1 回答 1

1

最舒适的方法是添加DocumentListener和有Pattern, valurJFormattedTextField可以插入(字符块)或按字符添加字符,我建议覆盖这两种方法

insertUpdate()

changedUpdate()//Plain text components don't fire these events.

对于插入的字符块将是更好的Pattern p = Pattern.compile("decision char filtering")直接实现

于 2011-12-08T18:08:37.853 回答