Cerrar JDialog con tecla ESC

Para darle un poco mas de caché a nuestras aplicaciones les mostraré código para cerrar un JDialog presionando la tecla ESC. Este ejemplo da para eso y mucho mas, ya depende de ustedes.

Primero necesitamos esta clase que es la que cacha los eventos del teclado:

/**
 * @JaverosAnonimos on Twitter 
*/
public class KeyListenerCustom implements KeyListener{
    private JDialog dialog=null;
    public KeyListenerCustom(JDialog dialog){
        System.out.println("Dialog!");
        this.dialog=dialog;
    }
    public void keyTyped(KeyEvent e) {
        System.out.println("Tecla apretada");
    }

    public void keyPressed(KeyEvent e) {
        System.out.println("entro");
        if(e.getKeyCode()==27) {//27 es el código de la tecla esc
            System.out.println("Adios!");
            dialog.setVisible(false);
        }
    }

    public void keyReleased(KeyEvent e) {
        System.out.println("Después de soltar la tecla!");     
    }

}

Y para probar esta clase un ejemplo de un JDialog implementandolo:

public class EjemploESC extends javax.swing.JDialog {
    /** Creates new form InformacionDialog */
    public EjemploESC(java.awt.Frame parent, boolean modal,String name) {
        super(parent, modal);
        initComponents();
        setTitle("Ejemplo cerrar con telca ESC");
        jPanel1.grabFocus();
        jPanel1.addKeyListener(new KeyListenerCustom(this));
    }
    

    /** 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")
    // 
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

        jPanel1.setName("jPanel1"); // NOI18N

        jLabel1.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("www.JaverosAnonimos.tk ");
        jLabel1.setName("jLabel1"); // NOI18N

        jLabel2.setFont(new java.awt.Font("Tahoma", 0, 14)); // NOI18N
        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel2.setText("http://JaverosAnonimos.blogspot.com");
        jLabel2.setName("jLabel2"); // NOI18N

        jLabel3.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N
        jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel3.setText("Presiona ESC para cerrar");
        jLabel3.setName("jLabel3"); // NOI18N

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jLabel2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 331, Short.MAX_VALUE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 331, Short.MAX_VALUE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 331, Short.MAX_VALUE))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addGap(63, 63, 63)
                .addComponent(jLabel3)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 78, Short.MAX_VALUE)
                .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 17, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
    }// 

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                EjemploESC dialog = new EjemploESC(null, true,"");
                dialog.addWindowListener(new java.awt.event.WindowAdapter() {
                    public void windowClosing(java.awt.event.WindowEvent e) {
                        System.exit(0);
                    }
                });
                dialog.setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    // End of variables declaration
}

Nota: Disculpen en chorote del ejemplo pero este código fue generado con NetBeans si quiren descargar el fuente pueden hacerlo aquí