Java 带有 MaskFormatter 的 JFormattedTextField
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JFormattedTextField with MaskFormatter
提问by Jeff Storey
I have a JFormattedTextFieldthat I use to restrict entries of a date and time. I want to use a MaskFormatterthough to show the placeholder chars. Is there a way to use a MaskFormatteron top of the JFormattedTextFieldwhen the text field is already using a SimpleDateFormat?
我有一个JFormattedTextField用于限制日期和时间的条目。我想使用一个MaskFormatter虽然来显示占位符字符。当文本字段已经使用 a 时，有没有办法MaskFormatter在顶部JFormattedTextField使用 a SimpleDateFormat？
Thanks, Jeff
谢谢，杰夫
采纳答案by I82Much
public class MaskFormatterTest {
private static final DateFormat df = new SimpleDateFormat("yyyy/mm/dd");
public static void main(String[] args) {
JFrame frame = new JFrame("");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JFormattedTextField tf = new JFormattedTextField(df);
tf.setColumns(20);
panel.add(tf);
try {
MaskFormatter dateMask = new MaskFormatter("####/##/##");
dateMask.install(tf);
} catch (ParseException ex) {
Logger.getLogger(MaskFormatterTest.class.getName()).log(Level.SEVERE, null, ex);
}
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
}
Unless I'm misunderstanding the question.
除非我误解了这个问题。
回答by trashgod
Alternatively, consider anInputVerifier, as suggested in InputVerificationDemoand this more elaborate example.
或者，考虑一个InputVerifier，如InputVerificationDemo和这个更详细的例子中所建议的。
回答by Mohamed Saligh
JFormattedTextField tft3 =
new JFormattedTextField(new SimpleDateFormat("yyyy-MM-dd"));
tft3.setValue(new Date());
Date date = (Date) tft3.getValue();
