Teclado Virtual [RESOLVIDO]

String[] 
is_key_name =	
{
     "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "=",
     "Q", "W", "E", "R", "T", "Y", "U", "I", "O", "P", "[", "]",
     "A", "S", "D", "F", "G", "H", "J", "K", "L", ";", "'",
     "Z", "X", "C", "V", "B", "N", "M", ",", ".", "/"
};

JButton[] io_bt_keyboard = new JButton[is_key_name.length];


// Cria os botões: "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "-", "="
for (int ln = 0; ln <= 11; ln++) {

     io_bt_keyboard[ln] = new JButton(null);
     io_bt_keyboard[ln].setText(is_key_name[ln]);
     add(io_bt_keyboard[ln]); // Utilize layout para posicionalos na primeira linha..
}

// Cria a ação para os botões.
for (int i = 0; i < is_key_name.length; i++) {

     io_bt_keyboard[i].addActionListener
     (
          new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    System.out.println(e.getActionCommand());
               }
          }
     );
}

public class TecladoVirtual extends JFrame {

	private static final long serialVersionUID = 1L;
	private JLabel jLabelNome;
	private JLabel jLabelSenha;
	private JTextField jTextNome;
	private JTextField jTextSenha;
	private JPanel _jPanelBotoes;

	public TecladoVirtual() {

		setTitle("Teclado Virtual");
		setLayout(new MigLayout());
		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		setResizable(false);
		// ////
		instanciarcomponentes();
		// /////
		add(jLabelNome);
		add(jTextNome, "span");
		add(jLabelSenha);
		add(jTextSenha, "span");
		add(_jPanelBotoes, "gaptop20, span");
		// ////
		pack();
		setLocationRelativeTo(null);
	}

	private void instanciarcomponentes() {
		jLabelNome = new JLabel("Digite o nome: ");
		jLabelSenha = new JLabel("Digite a senha: ");
		jTextNome = new JTextField(12);
		jTextSenha = new JTextField(12);
		_jPanelBotoes = new JPanel();
		_jPanelBotoes.setBorder(new TitledBorder(null, "Botões",
				TitledBorder.DEFAULT_JUSTIFICATION,
				TitledBorder.DEFAULT_POSITION, null, new Color(49, 106, 196)));
		_jPanelBotoes.setLayout(new MigLayout());

		String[] caracteres = { "1", "2", "3", "4", "5", "6", "7", "8", "9",
				"0", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K",
				"L", "M", "N", "O", "P", "Q", "T", "S", "T", "U", "V", "W",
				"X", "Y", "Z", "BACKSPACE" };

		JButton[] vetordebotoes = new JButton[caracteres.length];

		// Cria os botões
		for (int cont = 0; cont < caracteres.length; cont++) {
			int i = cont + 1; //i é 1 variável que nunca pode ser 0

			vetordebotoes[cont] = new JButton(caracteres[cont]);

			if (i % 10 == 0) { //se multiplo de 10, adiciona e quebra a linha
				_jPanelBotoes.add(vetordebotoes[cont], "span");
			} else if (cont == caracteres.length - 1) { //o ultimo (backspace ocupa a linha inteira)
				_jPanelBotoes.add(vetordebotoes[cont], "grow, span");
			} else { // senão só adiciona
				_jPanelBotoes.add(vetordebotoes[cont]);
			}
			vetordebotoes[cont].setFocusable(false);// não deixa focusable

			vetordebotoes[cont].addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					escreveouapaga(e);
				}
			});
		}
	}

	private void escreveouapaga(ActionEvent e) {
		//pega qual tem focus e grava no JTextField qual
		JTextField qual;
		if (jTextNome.hasFocus()) {
			qual = jTextNome;
		} else {
			qual = jTextSenha;
		}
		String oqtaescrito = qual.getText();

		if (e.getActionCommand().equals("BACKSPACE")) {
			if (oqtaescrito.length() > 0) {
				oqtaescrito = oqtaescrito.substring(0, (oqtaescrito.length()) - 1);		
			}
		}
		
		else {
			oqtaescrito = oqtaescrito + e.getActionCommand();
		}
		qual.setText(oqtaescrito);
	}

	public static void main(String[] args) {
		new TecladoVirtual().setVisible(true);
	}
}

public class Virtual extends JDialog {

	private static final long serialVersionUID = 1L;
	private JPanel _jPanelBotoes;
	String[] caracteres;

	public Virtual() {
		setTitle("Teclado Virtual");
		setLayout(new MigLayout());
		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		setResizable(false);
		// ////
		instanciarcomponentes();
		// /////
		add(_jPanelBotoes, "gaptop20, span");
		// ////
		pack();
		setFocusable(false);
		setLocationRelativeTo(null);
		setAlwaysOnTop(true);
	}

	private void instanciarcomponentes() {
		_jPanelBotoes = new JPanel();
		_jPanelBotoes.setBorder(new TitledBorder(null, "Botões",
				TitledBorder.DEFAULT_JUSTIFICATION,
				TitledBorder.DEFAULT_POSITION, null, new Color(49, 106, 196)));
		_jPanelBotoes.setLayout(new MigLayout());

		caracteres = new String[] { "1", "2", "3", "4", "5", "6", "7", "8",
				"9", "0", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J",
				"K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",
				"W", "X", "Y", "Z", "BACKSPACE" };

		JButton[] vetordebotoes = new JButton[caracteres.length];

		// Cria os botões
		for (int cont = 0; cont < caracteres.length; cont++) {
			int i = cont + 1; // i é 1 variável que nunca pode ser 0

			vetordebotoes[cont] = new JButton(caracteres[cont]);

			if (i % 10 == 0) { // se multiplo de 10, adiciona e quebra a linha
				_jPanelBotoes.add(vetordebotoes[cont], "span");
			} else if (cont == caracteres.length - 1) { // o ultimo (backspace)  ocupa a linha inteira)
				_jPanelBotoes.add(vetordebotoes[cont], "grow, span");
			} else { // senão só adiciona
				_jPanelBotoes.add(vetordebotoes[cont]);
			}
			vetordebotoes[cont].setFocusable(false);// não deixa focusable

			vetordebotoes[cont].addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					escreveouapaga(e);
				}
			});
		}
	}

	private void escreveouapaga(ActionEvent e) {
		String digitada = e.getActionCommand();
		int posicao = 0;
		for (int i = 0; i < caracteres.length; i++) {
			if (caracteres[i] == digitada) {
				posicao = i;
			}
		}

		int keyInput[] = { KeyEvent.VK_1, KeyEvent.VK_2, KeyEvent.VK_3,
				KeyEvent.VK_4, KeyEvent.VK_5, KeyEvent.VK_6, KeyEvent.VK_7,
				KeyEvent.VK_8, KeyEvent.VK_9, KeyEvent.VK_0, KeyEvent.VK_A,
				KeyEvent.VK_B, KeyEvent.VK_C, KeyEvent.VK_D, KeyEvent.VK_E,
				KeyEvent.VK_F, KeyEvent.VK_G, KeyEvent.VK_H, KeyEvent.VK_I,
				KeyEvent.VK_J, KeyEvent.VK_K, KeyEvent.VK_L, KeyEvent.VK_M,
				KeyEvent.VK_N, KeyEvent.VK_O, KeyEvent.VK_P, KeyEvent.VK_Q,
				KeyEvent.VK_R, KeyEvent.VK_S, KeyEvent.VK_T, KeyEvent.VK_U,
				KeyEvent.VK_V, KeyEvent.VK_W, KeyEvent.VK_X, KeyEvent.VK_Y,
				KeyEvent.VK_Z, KeyEvent.VK_BACK_SPACE };

		try {
			Robot meurobo = new Robot();
			meurobo.keyPress(KeyEvent.VK_ALT);
			meurobo.keyPress(KeyEvent.VK_TAB);
			meurobo.keyRelease(KeyEvent.VK_TAB);
			meurobo.keyRelease(KeyEvent.VK_ALT);
			meurobo.delay(150);
			meurobo.keyPress(keyInput[posicao]);
		} catch (AWTException e1) {
			e1.printStackTrace();
		}

	}

	public static void main(String[] args) {
		new Virtual().setVisible(true);
	}
}

Para abrir:

Runtime.getRuntime().exec("C:\Temp\VideoTeclado.exe");

Para fecha-lo:

Runtime.getRuntime().exec("taskkill /f /im VideoTeclado.exe");