JavaFX 2.2 TextField maxlength [英] JavaFX 2.2 TextField maxlength
本文介绍了JavaFX 2.2 TextField maxlength的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用JavaFX 2.2项目,使用TextField控件时遇到问题。我想限制用户将输入到每个TextField的字符,但我找不到像maxlength这样的属性。摇摆存在同样的问题,并通过此一个方法。如何解决JavaFX 2.2?
I am working with a JavaFX 2.2 project and I have a problem using the TextField control. I want to limit the characters that users will enter to each TextField but I can't find a property or something like maxlength. The same problem was existing to swing and was solved with this way. How to solve it for JavaFX 2.2?
推荐答案
这是在通用文本字段上完成工作的更好方法:
This is a better way to do the job on a generic text field:
public static void addTextLimiter(final TextField tf, final int maxLength) {
tf.textProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(final ObservableValue<? extends String> ov, final String oldValue, final String newValue) {
if (tf.getText().length() > maxLength) {
String s = tf.getText().substring(0, maxLength);
tf.setText(s);
}
}
});
}
完美无缺,除了撤销错误。
Works perfectly, except for that Undo bug.
这篇关于JavaFX 2.2 TextField maxlength的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文