Java Swing - 如何創(chuàng)建自定義JFormattedTextField特定格式
我們想知道如何創(chuàng)建自定義JFormattedTextField特定格式。
import java.awt.BorderLayout;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.text.MaskFormatter;
public class Main extends JPanel {
private JFormattedTextField formatText = new JFormattedTextField(createFormatter("##:##"));
public Main() {
formatText.setColumns(20);
formatText.setText("00:00");
setLayout(new BorderLayout());
add(new JLabel("Enter only numbers"), BorderLayout.NORTH);
add(formatText, BorderLayout.CENTER);
}
private MaskFormatter createFormatter(String s) {
MaskFormatter formatter = null;
try {
formatter = new MaskFormatter(s);
} catch (java.text.ParseException exc) {
System.err.println("formatter is bad: " + exc.getMessage());
}
return formatter;
}
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.add(new Main());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
【jformattedtextfield】
