JarOutputStream

Hi everyone,
I am currently trying to create a tool that jars all my classes into an executable jar. What i mean is that when i click on the particular jar file in windows explorer the program is run. I managed to create the jar file but the problem is that when i click on the jar file the program is not excuted and the java virtual machine says that the manifest file could not be read.

When i try to unpack the jar file all my classes are there but my manifest file always remains empty.This is a pretty long program so apologize for any inconvinience caused. And yes the manifest file is placed in a separate folder.

The program is as follows:

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.util.jar.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;

public class JPackager implements ActionListener

{

JFrame fr = new JFrame ("Frame");
JDialog Dialog1 = new JDialog(fr, "Select The Main Method");

JLabel Label1 = new JLabel("Label1                        ", SwingConstants.RIGHT);
JLabel Label2 = new JLabel("Add Java Class Files To The Jar Archive");
JLabel Label3 = new JLabel("Select The Class With The Main Method");

JButton Button1 = new JButton("Add Java Classes To List");
JButton Button2 = new JButton("Create Jar");
JButton Button3 = new JButton("Exit");
JButton Button4 = new JButton("Create Jar File");
JButton Button5 = new JButton("Close");
JButton Button6 = new JButton("Remove Selected File");
JButton Button7 = new JButton("Clear List");

JPanel Panel1 = new JPanel();
JPanel Panel2 = new JPanel();

//The below command line creates the group for the JRadioButton

ButtonGroup Group1 = new ButtonGroup();

JRadioButton RadioButton1 = new JRadioButton("Auto Create Manifest", true);
JRadioButton RadioButton2 = new JRadioButton("Manual Create Manifest", false);

DefaultListModel list1 = new DefaultListModel();
DefaultListModel list2 = new DefaultListModel();

JTextArea TextArea1 = new JTextArea("Text Area",5, 30);

//The below list displays the class file names to be added to the jar archive
 
JList List1 = new JList(list1);
//The below list displays the class file names to be added to the jar archive

JList List2 = new JList(list2);

JScrollPane ScrollPane1 = new JScrollPane(List1, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, 
                                          ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
                                          
JScrollPane ScrollPane2 = new JScrollPane(List2, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, 
                                          ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
                                          
JScrollPane ScrollPane3 = new JScrollPane(TextArea1, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, 
                                          ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);

                    
JFileChooser FileChooser1 = new JFileChooser();
JFileChooser FileChooser2 = new JFileChooser();  

Manifest manifest;                                                              

Dimension Size1 = new Dimension();
Dimension Size2 = new Dimension();

public void initialize ()
{ 
Container pane1 = fr.getContentPane();
pane1.setLayout(new FlowLayout());
fr.setSize(250,300);
fr.setLocation(300,300);
fr.setBackground(Color.lightGray);
Size1.width = 350;
Size1.height = 250;
List1.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
List1.setLayoutOrientation(JList.VERTICAL);
ScrollPane1.setPreferredSize(Size1);
ScrollPane1.setColumnHeaderView(Label2);
pane1.add(ScrollPane1);

pane1.add(Button1);
pane1.add(Button2);
pane1.add(Button3);
pane1.add(Button6);
pane1.add(Button7);

Size2.width = 350;
Size2.height = 250;
TextArea1.setLineWrap(false);
TextArea1.setWrapStyleWord(false);
ScrollPane1.setPreferredSize(Size2);
pane1.add(ScrollPane3);

pane1.add(Label1);

// Use the JAVA constant JFrame.HIDE_ON_CLOSE for subsequent forms in multi form
// applications

fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Button1.addActionListener(this);
Button2.addActionListener(this);
Button3.addActionListener(this);
Button6.addActionListener(this);
Button7.addActionListener(this);
fr.pack();
fr.setVisible(true);
}

public void initializedialog1 ()
{ 
Container pane2 = Dialog1.getContentPane();
pane2.setLayout(new BorderLayout());
Dialog1.setSize(250,300);
Dialog1.setLocation(300,300);
Dialog1.setBackground(Color.lightGray);

List2.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
List2.setLayoutOrientation(JList.VERTICAL);
ScrollPane1.setColumnHeaderView(Label3);

pane2.add(ScrollPane2, "Center");

initializepanel1();
pane2.add(Panel1, "North");

initializepanel2();
pane2.add(Panel2, "West");

// Use the JAVA constant JFrame.HIDE_ON_CLOSE for subsequent forms in multi form
// applications

Dialog1.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
Dialog1.pack();
Dialog1.setVisible(true);
}

public void initializepanel1 ()
{ 
Panel1.setLayout(new FlowLayout());
Panel1.add(Button4);
Panel1.add(Button5);
Button4.addActionListener(this);
Button5.addActionListener(this);
}

public void initializepanel2 ()
{ 
Panel2.setLayout(new BoxLayout(Panel2, BoxLayout.Y_AXIS));

//The below three command lines adds the JRadioButton to a group

Group1.add(RadioButton1);
Group1.add(RadioButton2);

Panel2.add(RadioButton1);
Panel2.add(RadioButton2);
}

public void autocreatemanifest (String str1)
{

String str2 = null, str3 = null;
String str4 = null;

int w = 0, w1 = 0;

str2 = str1;
//The below command line removes the extension of the java class

w = str2.lastIndexOf(".");
str3 = str2.substring(0, w);
//The below command line removes the path of the java file name

w1 = str3.lastIndexOf("\\");
str4 = str3.substring(w1 + 1, str3.length());

try
{

StringBuffer StringBuffer1 = new StringBuffer();
StringBuffer1.append("Main-Class: " + str4);
StringBuffer1.append("\n");
StringBuffer1.append("\n");

ByteArrayInputStream is = new ByteArrayInputStream(StringBuffer1.toString().getBytes("UTF-8"));

manifest = new Manifest(is);
}

catch(Exception e)
{
Label1.setText("The manifest file could not be created");
}

}

public void manualcreatemanifest (String str5)
{

try
{
StringBuffer StringBuffer2 = new StringBuffer();
StringBuffer2.append(str5);
StringBuffer2.append("\n");
StringBuffer2.append("\n");

InputStream is1 = new ByteArrayInputStream(StringBuffer2.toString().getBytes("UTF-8"));

manifest = new Manifest(is1);
}

catch(Exception e)
{
Label1.setText("The manifest file could not be created");
}

}

public void insertfiles ()
{
int i = 0;

//The below three command lines sets the JFileChooser options to select 
//the file that is required by the user to be archived

FileChooser1.setMultiSelectionEnabled(true);
FileChooser1.setDialogType(JFileChooser.SAVE_DIALOG);
FileChooser1.setDialogTitle("Select the java classes files to archive");

if(FileChooser1.showDialog(fr,"Select files") != JFileChooser.APPROVE_OPTION)
{
return;
}

//The below command line passes the selected files to the 
//File[] array to be passed to the createarchive as an argument

File[] selected = FileChooser1.getSelectedFiles(); 

for(i=0;i<selected.length;i++)
{
list1.addElement(selected[i].toString());
list2.addElement(selected[i].toString());
}

}

public void listall ()
{
//This function archives all the files in the list box

Object[] p = list1.toArray();
String[] k = new String[p.length];
int j = 0;

//The below command line transfers the files in the list box 
//to a string array

for(j=0;j<p.length;j++)
{
k[j] = p[j].toString();
}

//The below two command lines sets the JFileChooser options to select 
//an output directory for the newly created archived file
 
FileChooser2.setDialogType(JFileChooser.OPEN_DIALOG);
FileChooser2.setDialogTitle("Select an output for the jar archive");

if(FileChooser2.showDialog(fr,"Archive") != JFileChooser.APPROVE_OPTION)
{
return;
}

//The below command line sets the file extension of the 
//user selected file
 
File f = FileChooser2.getSelectedFile();
String archive = (f.toString() + ".jar");

createjararchive(archive, k);
}

public void createjararchive (String str6, String[] str7)
{
byte buffer3[] = new byte[10240];
int k = 0, k1 = 0;
String s = null, g = null;

try
{
FileOutputStream stream = new FileOutputStream(str6);

JarOutputStream out = new JarOutputStream(stream, manifest);

for (k=0; k<str7.length; k++)
{

// Add archive entry
s = str7[k];
k1 = s.lastIndexOf("\\");
g = s.substring(k1+1);

JarEntry jarAdd = new JarEntry(g);
out.putNextEntry(jarAdd);

// Write file to archive
FileInputStream in = new FileInputStream(str7[k]);
				
while(true)
{

int nRead = in.read(buffer3, 0, buffer3.length);
					
if (nRead <= 0)
{
break;
}

out.write(buffer3, 0, nRead);
}

in.close();
}
			
out.close();
stream.close();
Label1.setText("The jar archive was created successfully");
}

catch (Exception e)
{
e.printStackTrace();
}

}

public void actionPerformed(ActionEvent event)
{
JComponent b = (JComponent)event.getSource();
int c = 0;
boolean d;
boolean e;
String str8 = null;

if(b == Button1)
{
insertfiles();
}

else if(b == Button2)
{
initializedialog1();
}

else if(b == Button3)
{
System.exit(0);
}

else if(b == Button4)
{

d = RadioButton1.isSelected();
e = RadioButton2.isSelected();

if(d == true)
{
str8 = (String)List2.getSelectedValue();
System.out.println(str8);
autocreatemanifest(str8);
listall();
}

else if(e == true)
{
str8 = TextArea1.getText();
manualcreatemanifest(str8);
listall();
}

}

else if(b == Button5)
{
Dialog1.setVisible(false);
}

else if(b == Button6)
{
c = List1.getSelectedIndex();
list1.removeElementAt(c);
list2.removeElementAt(c);
}

else if(b == Button7)
{
list1.clear();
list2.clear();
}

}   
public static void main(String args[])
{
JPackager a = new JPackager(); 
a.initialize();
}
}

I do not know why the manifest file is always empty although its not supposed to be.

I also apologize for the layout of the frame as it was done rather quickly.

i hope somone can take look at my code and tell me where i have gone wrong.

Once again i apologize for the long program

Any help is greatly appreciated

Thank You

Yours Sincerely

Richard West