/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

1 vote358 views1 answer
How to install java 8 on aws linux
Java
0 vote349 views1 answer
Comparable on a generic class java
Java
1 vote388 views1 answer
Androidx.fragment.app.Fragment$InstantiationException
Java
0 vote332 views2 answers
How to get width android
Java
0 vote342 views1 answer
Setcontentview in java
Java
6 votes363 views5 answers
Remove duplicates from list java
Java
1 vote419 views1 answer
Load a file from classpath spring boot
Java Spring
0 vote387 views1 answer
Java vererbung methoden
Java
0 vote352 views1 answer
How to print all package in java
Java
0 vote354 views1 answer
Destroy fragent after navigating
Java