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:
Code:
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
JarOutputStream
Linear Mode
