/Java/How to create java textfield which allow only numbers

How to create java textfield which allow only numbers

Javafx textfield only numbers

// force the field to be numeric only
textField.textProperty().addListener(new ChangeListener<String>() {
    @Override
    public void changed(ObservableValue<? extends String> observable, String oldValue, 
        String newValue) {
        if (!newValue.matches("\\d*")) {
            textField.setText(newValue.replaceAll("[^\\d]", ""));
        }
    }
});

Source: stackoverflow.com

How to make jtextfield accept only numbers

    NumberFormat format = NumberFormat.getInstance();
    NumberFormatter formatter = new NumberFormatter(format);
    formatter.setValueClass(Integer.class);
    formatter.setMinimum(0);
    formatter.setMaximum(Integer.MAX_VALUE);
    formatter.setAllowsInvalid(false);
    // If you want the value to be committed on each keystroke instead of focus lost
    formatter.setCommitsOnValidEdit(true);
    JFormattedTextField field = new JFormattedTextField(formatter);

    JOptionPane.showMessageDialog(null, field);

    // getValue() always returns something valid
    System.out.println(field.getValue());

Source: stackoverflow.com

How to create java textfield which allow only numbers

tf.addKeyListener(new KeyAdapter() {
         public void keyPressed(KeyEvent ke) {
            String value = tf.getText();
            int l = value.length();
            if (ke.getKeyChar() >= '0' && ke.getKeyChar() <= '9'|| ke.getKeyCode()==KeyEvent.VK_BACK_SPACE) {
               tf.setEditable(true);
               label.setText("");
            } else {
               tf.setEditable(false);
               label.setText("* Enter only numeric digits(0-9)");
            }
         }
      });

Source: tutorialspoint.com

Similar codes

0 vote104 views1 answer
Java convert LocalDateTime to long
Java
1 vote128 views1 answer
Long vs int java
Java
3 votes116 views1 answer
How to make phone vibrate android studio
Java
0 vote103 views1 answer
Thread example in android
Java
0 vote132 views1 answer
Rxjava dependencies
Java
0 vote121 views1 answer
What does this means error: cannot find symbol StorageRef.child(mUser()).putFile(imageUri).addOnCompleteListener(new OnCompleteListener<UploadTask.TaskSnapshot>()
Java
0 vote108 views1 answer
Redondear a 2 decimales java
Java
1 vote113 views1 answer
Java jtextfield text bold
Java
0 vote112 views1 answer
Initialize list in java in one line
Java
-2 votes100 views2 answers
Python to java code conversion
Java