Subclass InputVerifier : Document Event « Swing JFC « Java

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Java » Swing JFC » Document Event   Subclass InputVerifier        import javax.swing.InputVerifier; import javax.swing.JComponent; import javax.swing.JTextField; public class Main {   public static void main(String[] args) {     JTextField tf = new JTextField("");     tf.setInputVerifier(new MyInputVerifier());   } } class MyInputVerifier extends InputVerifier {   public boolean verify(JComponent input) {     JTextField tf = (JTextField) input;     String pass = tf.getText();     return pass.equals("AA");   } }                       Related examples in the same category 1. DocumentFilter that maps lowercase letters to uppercase 2. An extension of PlainDocument that restricts the length of its content 3. Document Event Demo 4. React to the document update insert changed event 5. HTMLDocument: Document Iterator Example 6. DocumentListener Demo 7. extends PlainDocument to create a float value type text field 8. extends PlainDocument to create alpha and numeric value based field field 9. Implement a document cleaner that maps lowercase letters to uppercase 10. Document ElementIterator Demo 11. Format JTextField's text to uppercase 12. Overriding a Few Default Typed Key Bindings in a JTextComponent 13. Overriding - key 14. Override $ key 15. Overriding space key 16. Disable a character so that no action is invoked. 17. Bind a keystroke to shift-space 18. Prevent the space from being inserted when shift-space is pressed. 19. extends PlainDocument 20. This Document restricts the size of the contained plain text to the given number of characters. 21. A frame with three text fields to set the background color.