Olá,
estou tentando abrir um arquivo através do JFileChooser, dessa forma:
private void openFile() {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int result = fileChooser.showOpenDialog(this);
// user clicked Cancel button on dialog
if (result == JFileChooser.CANCEL_OPTION)
return;
File fileName = fileChooser.getSelectedFile();
if (fileName == null || fileName.getName().equals(""))
JOptionPane.showMessageDialog(this, "Invalid File Name", "Invalid File Name", JOptionPane.ERROR_MESSAGE);
else {
// Open the file
try {
input = new ObjectInputStream(new FileInputStream(fileName));
open.setEnabled(false);
nextRecord.setEnabled(true);
} catch (IOException e) {
e.printStackTrace();
JOptionPane.showMessageDialog(this, "Error Opening File", "Error", JOptionPane.ERROR_MESSAGE);
}
}
}Só que qnd eu tento abrir, dá esse erro:
java.io.StreamCorruptedException: invalid stream header at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:753)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:268)
at LerArquivoSeq.openFile(LerArquivoSeq.java:81)
at LerArquivoSeq.access$2(LerArquivoSeq.java:63)
at LerArquivoSeq$3.actionPerformed(LerArquivoSeq.java:53)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
at java.awt.Component.processMouseEvent(Component.java:5488)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3093)
at java.awt.Component.processEvent(Component.java:5253)
at java.awt.Container.processEvent(Container.java:1966)
at java.awt.Component.dispatchEventImpl(Component.java:3955)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
at java.awt.Container.dispatchEventImpl(Container.java:2010)
at java.awt.Window.dispatchEventImpl(Window.java:1766)
at java.awt.Component.dispatchEvent(Component.java:3803)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Alguém poderia me ajudar?? 
