使用取消按钮时如何恢复InputVerifier机制？

Question

I have an InputVerifier on a JFormattedTextField. It is called when field looses focus perfectly. I added a cancel button (JButton), but do not want to call then InputVerifier when this button is clicked.

MyVerifier is called when the focus is lost on the field without any problem. However, after I click the clearButton the InputVerifier won´t be called again, as if the button where clicked even if it´s not.

The complete code is:

public class DemoFrame extends javax.swing.JFrame {

    /** Creates new form DemoFrame */
    public DemoFrame() {
        initComponents();
        name.setValue("");
        name.setInputVerifier(new MyVerifier());
        clear.setVerifyInputWhenFocusTarget(false);
    }

    private class MyVerifier extends javax.swing.InputVerifier {
     public boolean verify(javax.swing.JComponent input) {
         System.out.println("Field is being verified");
          return true;
      }
      public boolean shouldYieldFocus(javax.swing.JComponent input) {
          return verify(input);
      }
  }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        name = new javax.swing.JFormattedTextField();
        clear = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        name.setText(" ");

        clear.setText("clear");
        clear.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clearActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(231, Short.MAX_VALUE)
                .addComponent(clear)
                .addGap(112, 112, 112))
            .addGroup(layout.createSequentialGroup()
                .addGap(116, 116, 116)
                .addComponent(name, javax.swing.GroupLayout.PREFERRED_SIZE, 128, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(156, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(94, 94, 94)
                .addComponent(name, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 90, Short.MAX_VALUE)
                .addComponent(clear)
                .addGap(73, 73, 73))
        );

        pack();
    }// </editor-fold>

    private void clearActionPerformed(java.awt.event.ActionEvent evt) {
        name.setValue(null);
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(DemoFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(DemoFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(DemoFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(DemoFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new DemoFrame().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton clear;
    private javax.swing.JFormattedTextField name;
    // End of variables declaration
}

Why isn't the InputVerifier been invoked if the field looses focus without the button being clicked?

Answer 1

Well. I found the solution.

    clear.setFocusable(false);

That solves the problem.