Numeric « JTextField « Java Swing Q&A

1. Is there any way to accept only numeric values in a JTextField? stackoverflow.com

Is there any way to accept only numeric values in a JTextField? Is there any special method for this?

2. Create a numeric text box in java Swing with increment and decrement buttons stackoverflow.com

How can I create a numeric text box in java swing , which has two buttons (up and down) which increments and decrements the value in the text box respectively. Also ...

3. numeric textfield coderanch.com

I know how to set up a textfield with a format so that the user can see that they need to enter numbers. What I need to do is not allow the user to enter anything but numbers. When they type any letter or sign I want nothing to show in the textfield. How do I do this?

4. Problem with JTextField and comma of keyboard numeric coderanch.com

5. How to make JTextField accepts negative numeric input? coderanch.com

6. how to avoid user to enter a numeric or alfanumeric input to JTextField coderanch.com

import javax.swing.*; import java.awt.*; import javax.swing.text.*; class Testing extends JFrame { public Testing() { setLocation(400,300); setDefaultCloseOperation(EXIT_ON_CLOSE); JPanel jp = new JPanel(); JTextField tf = new JTextField(25){public void paste(){}}; tf.setDocument(new PlainDocument(){ public void insertString(int offs, String str, AttributeSet a) throws BadLocationException{ if("0123456789".indexOf(str) > -1) { java.awt.Toolkit.getDefaultToolkit().beep(); return; } else super.insertString(offs, str, a);}}); jp.add(tf); getContentPane().add(jp); pack(); } public static void main(String[] args){new Testing().setVisible(true);} ...