:D Bom dia a todos :!:
Tenho o seguinte problema.
Preciso criar um processo que é disparado por uma tela, porém a tela não pode ficar imóvel, tenho que informar o usuário sobre o andamento do processo através de uma barra de progresso e de mensagens que serão mostradas por um JTextField.
Criei um exemplo simples usando o pattern Observer, consigo atualizar o System.out.println no console, mas não consigo atualizar a tela em tempo de execução.
:( O que está errado?
Segue código da Tela Observer :/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Tela.java
*
* Created on 06/04/2011, 08:18:56
*/
package testethread;
import java.util.Observable;
import java.util.Observer;
/**
*
* @author juc
*/
public class Tela extends javax.swing.JFrame implements Observer{
private Executor exec;
/** Creates new form Tela */
public Tela() {
initComponents();
exec = new Executor();
exec.addObserver(this);
}
public void update(Observable o, Object arg){
jTextField1.setText(exec.getLabel());
if (exec.getSizeProc() != 0 ){
jProgressBar1.setMaximum(exec.getSizeProc());
}
jProgressBar1.setValue(exec.getContador());
System.out.println(exec.getLabel());
}
/** 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();
jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jProgressBar1 = new javax.swing.JProgressBar();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(255, 255, 255));
jButton1.setText("Executar");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
jProgressBar1.setStringPainted(true);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(6, 6, 6)
.addComponent(jProgressBar1, javax.swing.GroupLayout.DEFAULT_SIZE, 370, Short.MAX_VALUE))
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jButton1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 295, Short.MAX_VALUE)))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(229, Short.MAX_VALUE))
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addContainerGap())
);
pack();
}// </editor-fold>
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
exec.executa(); // TODO add your handling code here:
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Tela().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
private javax.swing.JProgressBar jProgressBar1;
private javax.swing.JTextField jTextField1;
// End of variables declaration
}
Segue código da classe Observable:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package testethread;
import java.util.Observable;
/**
*
* @author juc
*/
public class Executor extends Observable {
private Thread processo = null;
private int contador;
private String label;
private static int sizeProc = 50000;
public Executor(){
}
public void run(){
for (int i = 0; i < 5000; i++){
this.setLabel("Iniciando");
setChanged();
notifyObservers(label);
}
for (int i = 0; i < 50000; i++){
this.setContador(i);
this.setLabel("Contando: " + i);
setChanged();
notifyObservers(label);
}
for (int i = 0; i < 5000; i++){
this.setLabel("Finalizando");
setChanged();
notifyObservers(label);
}
}
public int getContador(){
return this.contador;
}
public void setContador(int cont){
this.contador = cont;
}
public String getLabel(){
return this.label;
}
public void setLabel(String label){
this.label = label;
}
public int getSizeProc(){
return this.sizeProc;
}
}
