Leer Base de Datos a un ComboBox y Mostrarlo
Publicado por luis cesar rojas chavez (2 intervenciones) el 08/11/2011 19:26:08
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import java.io.File;
import java.io.FileWriter;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameListener;
public class ESPECIALIDAD extends javax.swing.JInternalFrame implements InternalFrameListener {
public static int cont=1;public ESPECIALIDAD() {
initComponents();
setLocation(20,15);
setFrameIcon(new ImageIcon("img/especialidad.png"));
//setSize(200, 200);
addInternalFrameListener(this);
}@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
txt_codigo_curso = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
txt_nombre_especialidad = new javax.swing.JTextField();
agregar = new javax.swing.JButton();
setClosable(true);
setIconifiable(true);
setTitle("Especialidad");
jLabel1.setText("Codigo");
jLabel2.setText("Descripcion");
agregar.setText("Agregar");
agregar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
agregarActionPerformed(evt);
}});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(35, 35, 35)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(agregar)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(27, 27, 27)
.addComponent(txt_nombre_especialidad, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(27, 27, 27)
.addComponent(txt_codigo_curso, javax.swing.GroupLayout.PREFERRED_SIZE, 108, javax.swing.GroupLayout.PREFERRED_SIZE)))))
.addContainerGap(49, Short.MAX_VALUE))
);layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(21, 21, 21)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(txt_codigo_curso, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(txt_nombre_especialidad, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addComponent(agregar)
.addContainerGap(59, Short.MAX_VALUE))
);pack();
}// </editor-fold>
void EscribirEspecialidad(String cod,String descr)
{File f=new File("archivos/ESPECIALIDAD.txt");
FileWriter fw=null; try {fw=new FileWriter(f,true);
fw.write(cod+":"+descr+"\n");
} catch (Exception e) {
System.out.println("algo pasa, veamos ¿q es??");
}finally{
try {fw.close();
} catch (Exception e) {
System.out.println("No ce cerro el archivo");
} } }private void agregarActionPerformed(java.awt.event.ActionEvent evt) {
String cod=txt_codigo_curso.getText();
String descr=txt_nombre_especialidad.getText();
EscribirEspecialidad(cod, descr);
Limpiar();
}void Limpiar()
{JOptionPane.showMessageDialog(null,"Se agrego "+cont+"° Registro más");
txt_codigo_curso.setText("");
txt_nombre_especialidad.setText("");
txt_codigo_curso.requestFocus();
cont++;
} // Variables declaration - do not modify
private javax.swing.JButton agregar;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField txt_codigo_curso;
private javax.swing.JTextField txt_nombre_especialidad;
// End of variables declaration
@Override
public void internalFrameOpened(InternalFrameEvent e) {}
@Override
public void internalFrameClosing(InternalFrameEvent e) {}
@Override
public void internalFrameClosed(InternalFrameEvent e)
{BOOLEANO a=new BOOLEANO();
a.setA(true);
}@Override
public void internalFrameIconified(InternalFrameEvent e) {}
@Override
public void internalFrameDeiconified(InternalFrameEvent e) {}
@Override
public void internalFrameActivated(InternalFrameEvent e) {}
@Override
public void internalFrameDeactivated(InternalFrameEvent e) {}
}Este es mi idea.. pero lo que tambien quiero es asignarle un precio a cada Item.
como aria esto? por favor alguien ayudeme con un ejemplo.
que se usando las paletas/diseño en java.
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