Io avrei fatto un piccolo codice di prova che qui posto:
codice:
package MultiTH;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JProgressBar;
public class Interface extends javax.swing.JFrame {
/**
* Creates new form Interface
*/
public Interface() {
initComponents();
this.setVisible(true);
}
/**
* 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() {
BarPanel = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
BarPanel.setBackground(new java.awt.Color(255, 255, 204));
jLabel1.setText("jLabel1");
BarPanel.add(jLabel1);
jButton1.setText("OK");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(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()
.addContainerGap()
.addComponent(BarPanel, javax.swing.GroupLayout.DEFAULT_SIZE, 327, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1)
.addGap(0, 0, Short.MAX_VALUE))
.addComponent(BarPanel, javax.swing.GroupLayout.DEFAULT_SIZE, 278, Short.MAX_VALUE))
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
MultiThreading();
}
/**
* @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(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Interface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Interface.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 Interface().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JPanel BarPanel;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
// End of variables declaration
private void MultiThreading() {
CalculateA A = new CalculateA();
CalculateB B = new CalculateB();
Thread tA = new Thread(A);
tA.setPriority(10);
tA.start();
Thread tB = new Thread(B);
tB.setPriority(10);
tB.start();
}
private class CalculateA implements Runnable{
@Override
public void run() {
JProgressBar A = new JProgressBar();
A.setMaximum(200);
BarPanel.add(A);
BarPanel.revalidate();
for(int i=0;i<201;i++){
try {
Thread.sleep(10);
} catch (InterruptedException ex) {}
System.out.println("Value A: " + i);
synchronized(this){
A.setValue(i);
A.setString(String.valueOf(i));
}
}
synchronized(this){
BarPanel.remove(A);
BarPanel.revalidate();
BarPanel.repaint();
}
}
}
private class CalculateB implements Runnable{
@Override
public void run() {
JProgressBar A = new JProgressBar();
A.setMaximum(500);
BarPanel.add(A);
BarPanel.revalidate();
for(int i=0;i<501;i++){
try {
Thread.sleep(10);
} catch (InterruptedException ex) {}
System.out.println("Value B: " + i);
synchronized(this){
A.setValue(i);
}
}
synchronized(this){
BarPanel.remove(A);
BarPanel.revalidate();
BarPanel.repaint();
}
}
}
}
Il codice simula due processi che riempiono due jprogressbar e accedono al thread della GUI tramite synchronized, ho fatto giusto?
Originariamente inviata da Lory1990
ogni volta che lancio un calcolo inserisco in un pannello dedicato una nuova progress bar che alla fine del processo viene rimossa e questo devo farlo dai thread secondari penso...
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