每当我想在动作监听器中运行fileToByteArray方法时，它就会要求try catch语句。当我运行代码时，我输入的文件不会被分解为字节。我已经尝试了一切。有人可以帮忙吗？
// ClientFrame.java
//
// Informatics 45 Spring 2010
// Code Example: GUI with Simple Sockets
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.Socket;
import javax.swing.*;
public class ClientFrame extends JFrame implements ClientProtocolListener
{
private JTextField nameField;
private JTextField addressField;
private JTextField portField;
private JButton connectButton;
private DefaultListModel resultsListModel;
static Socket sockets;
File files;
private ClientProtocol clientProtocol;
static File file;
public ClientFrame()
{
setSize(500, 700);
setTitle("Informatics 45 GUIs and Sockets Example (Client)");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
buildUI();
clientProtocol = null;
}
private void buildUI()
{
GridBagLayout layout = new GridBagLayout();
getContentPane().setLayout(layout);
JLabel nameLabel = new JLabel("Your name: ");
layout.setConstraints(
nameLabel,
new GridBagConstraints(
0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(nameLabel);
nameField = new JTextField();
layout.setConstraints(
nameField,
new GridBagConstraints(
1, 0, 1, 1, 1.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(nameField);
JLabel addressLabel = new JLabel("Address:");
layout.setConstraints(
addressLabel,
new GridBagConstraints(
0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(addressLabel);
addressField = new JTextField();
layout.setConstraints(
addressField,
new GridBagConstraints(
1, 1, 1, 1, 1.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(addressField);
JLabel portLabel = new JLabel("Port: ");
layout.setConstraints(
portLabel,
new GridBagConstraints(
0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(portLabel);
portField = new JTextField();
layout.setConstraints(
portField,
new GridBagConstraints(
1, 2, 1, 1, 1.0, 0.0,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(portField);
connectButton = new JButton("Connect");
connectButton.addActionListener(
new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
connect();
//getFileChooser();
try {
fileToByteArray(file);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
layout.setConstraints(
connectButton,
new GridBagConstraints(
1, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST, GridBagConstraints.NONE,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(connectButton);
JLabel statusLabel = new JLabel("Status");
layout.setConstraints(
statusLabel,
new GridBagConstraints(
0, 4, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(statusLabel);
resultsListModel = new DefaultListModel();
JList resultsList = new JList(resultsListModel);
JScrollPane resultsScroller = new JScrollPane(resultsList);
layout.setConstraints(
resultsScroller,
new GridBagConstraints(
0, 5, 2, 1, 1.0, 1.0,
GridBagConstraints.CENTER, GridBagConstraints.BOTH,
new Insets(10, 10, 10, 10), 0, 0));
getContentPane().add(resultsScroller);
}
private void connect()
{
String name = getNameFromField();
String address = getAddressFromField();
int port = getPortFromField();
if (name == null || address == null || port == -1)
{
return;
}
connectButton.setEnabled(false);
resultsListModel.addElement("Connecting to " + address + " port " + port);
clientProtocol = new ClientProtocol(name, address, port);
clientProtocol.addClientProtocolListener(this);
Thread clientThread = new Thread(clientProtocol);
clientThread.start();
}
private String getNameFromField()
{
String name = nameField.getText().trim();
if (name.length() == 0)
{
JOptionPane.showMessageDialog(
this, "Please specify a name", "Validation Error",
JOptionPane.ERROR_MESSAGE);
return "";
}
return name;
}
private String getAddressFromField()
{
String address = addressField.getText().trim();
if (address.length() == 0)
{
JOptionPane.showMessageDialog(
this, "Please specify an address", "Validation Error",
JOptionPane.ERROR_MESSAGE);
return null;
}
return address;
}
private int getPortFromField()
{
int port;
try
{
port = Integer.parseInt(portField.getText());
}
catch (NumberFormatException e)
{
JOptionPane.showMessageDialog(
this, "Please specify a number for the port between 0 and 65535",
"Validation Error", JOptionPane.ERROR_MESSAGE);
return -1;
}
return port;
}
public void connectionEstablished(final String serverAddress, final int serverPort)
{
EventQueue.invokeLater(
new Runnable()
{
public void run()
{
resultsListModel.addElement("Connected to " + serverAddress + " port " + serverPort);
}
});
}
public void okayReceived(final String otherName)
{
EventQueue.invokeLater(
new Runnable()
{
public void run()
{
resultsListModel.addElement("OKAY received from " + otherName);
}
});
}
public void connectionClosed()
{
EventQueue.invokeLater(
new Runnable()
{
public void run()
{
resultsListModel.addElement("Connection closed");
connectButton.setEnabled(true);
}
});
}
public void protocolFailed(final Exception failureReason)
{
EventQueue.invokeLater(
new Runnable()
{
public void run()
{
resultsListModel.addElement(
"Protocol failure: " + failureReason.getMessage());
connectButton.setEnabled(true);
}
});
}
public void dispose()
{
if (clientProtocol != null)
{
clientProtocol.removeClientProtocolListener(this);
clientProtocol.close();
}
super.dispose();
}
public void getFileChooser (){
FileChooser chooseFile = new FileChooser();
file = chooseFile.getFile();
}
public byte[] fileToByteArray(File fileArray)
throws IOException
{
if (fileArray.exists() == false)
{
System.out.println ("Please specify a file to read ");
return null;
}
int fileLength = (int) fileArray.length();
byte[] fileBytes = new byte[fileLength];
FileInputStream input = new FileInputStream (fileArray);
int offset = 0;
while (offset < fileLength)
{
int nextChunkSize = Math.min(65536, fileLength - offset);
offset += input.read(fileBytes, offset, nextChunkSize);
}
input.close();
System.out.println ("The files lenth was " + fileLength);
System.out.println ("The first 10 bytes are :")
;
for (int i = 0; i <10; i++)
{
System.out.print (Integer.toHexString (((int)fileBytes[i])&0xFF).toUpperCase());
System.out.print(" " );
}
return fileBytes;
}
public void sendFile(byte[] byteArray){
}
}