Unidad 4 Ejercicio 5

Repetir el programa anterior, pero utilizando el gestor de diseño GridLayout, definiendo 2 filas y 2 columnas. En la primera fila se incluyen dos JTextField, y en la segunda dos JLabel. Mirar en la ayuda el método setFont, y la clase Font.
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package unidad4ejercicio5;

import java.awt.Font;
import java.awt.Image;
import java.text.DecimalFormat;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;


public class VentanaExplica extends javax.swing.JFrame {

    /**
     * Creates new form VentanaExplica
     */
    public VentanaExplica() {
        initComponents();
        txtEuros.setFont(this.getFuenteLetra());

      
        ImageIcon logo=new ImageIcon(getClass().getResource("logocarballeira.png"));
        //Image icono = logo.getImage().getScaledInstance(120, 120, Image.SCALE_DEFAULT);
        //Image icono=logo.getImage();
        txtEuros.setFont(this.getFuenteLetra());
        this.setIconImage(logo.getImage());
        this.setTitle("Conversor Euros/Pesetas");
    }

    /**
     * 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() {

        jPanel1 = new javax.swing.JPanel();
        txtEuros = new javax.swing.JTextField();
        txtPesetas = new javax.swing.JTextField();
        lblEuros = new javax.swing.JLabel();
        lblPesetas = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setMinimumSize(new java.awt.Dimension(420, 300));

        jPanel1.addComponentListener(new java.awt.event.ComponentAdapter() {
            public void componentResized(java.awt.event.ComponentEvent evt) {
                jPanel1ComponentResized(evt);
            }
        });
        jPanel1.setLayout(new java.awt.GridLayout(2, 0));

        txtEuros.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                txtEurosKeyReleased(evt);
            }
        });
        jPanel1.add(txtEuros);

        txtPesetas.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyReleased(java.awt.event.KeyEvent evt) {
                txtPesetasKeyReleased(evt);
            }
        });
        jPanel1.add(txtPesetas);

        lblEuros.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        lblEuros.setText("Euros:");
        jPanel1.add(lblEuros);

        lblPesetas.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        lblPesetas.setText("Pesetas:");
        jPanel1.add(lblPesetas);

        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);

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

    private void txtEurosKeyReleased(java.awt.event.KeyEvent evt) {
        convAPesetas();
    }

    private void txtPesetasKeyReleased(java.awt.event.KeyEvent evt) {
        convAEuros();
    }

    private void jPanel1ComponentResized(java.awt.event.ComponentEvent evt) {
      txtEuros.setFont(this.getFuenteLetra());
      repaint();
    }

    /**
     * @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(VentanaExplica.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(VentanaExplica.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(VentanaExplica.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(VentanaExplica.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 VentanaExplica().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JPanel jPanel1;
    private javax.swing.JLabel lblEuros;
    private javax.swing.JLabel lblPesetas;
    private javax.swing.JTextField txtEuros;
    private javax.swing.JTextField txtPesetas;
    // End of variables declaration

  
    private void convAPesetas() {
     double pesetas,euros;
     DecimalFormat formato = new DecimalFormat("######.##");
     if (!txtEuros.getText().trim().equals(""))
        try {
            euros = Double.parseDouble(txtEuros.getText());
            pesetas=euros*166.386;
            txtPesetas.setText(formato.format(pesetas));
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(this, "Los datos introducidos no se pueden convertir a moneda", "Error en la conversión", JOptionPane.ERROR_MESSAGE);
            txtEuros.setText("");
            txtEuros.requestFocus();
        }
    
    
    
    }

    private void convAEuros() {
      double pesetas,euros;
      DecimalFormat formato = new DecimalFormat("######.##");
       if (!txtPesetas.getText().trim().equals(""))
        try {
            pesetas = Double.parseDouble(txtPesetas.getText());
            euros=pesetas/166.386;
            txtEuros.setText(String.valueOf(formato.format(euros)));
        } catch (NumberFormatException e) {
            JOptionPane.showMessageDialog(this, "Los datos introducidos no se pueden convertir a moneda", "Error en la conversión", JOptionPane.ERROR_MESSAGE);
            txtPesetas.setText("");
            txtPesetas.requestFocus();
        }
    
    }
  
      private Font getFuenteLetra(){
        Font fuente;
        int alto= txtEuros.getHeight();
      
        fuente=new Font(Font.SANS_SERIF,Font.BOLD+Font.ITALIC,alto*2/7);
        return fuente;
    }

}