Develop Reference

Retrive serialized JFrame to upload in MySql

I have an object in Jython that extends a Java Swing JFrame. My goal is to serialize it in order to save it on MySql, query the database, deserialize it and review the JFrame exactly as it was before it was deserialized (with all fields filled in).
I honestly don't know where to start. I can't imagine serialization - saving to database.
I guess the serialized JFrame could be blob, longblob or bit type on MySql.
For now I have done a local experiment using my old and little academic knowledge on the serialization of objects in java, with poor results:
def saveArt(self, e):
v = Vector()
v.add(self) # self = JFrame in question
out = ObjectOutputStream(BufferedOutputStream(FileOutputStream("prova.dat")))
out.writeObject(v)
out.close()
What I did was just put the frame in a Java vector and save it to the file, however I got the following error:
Exception in thread "AWT-EventQueue-0" at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.concurrent.ConcurrentHashMap.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.util.concurrent.ConcurrentHashMap.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at javax.swing.event.EventListenerList.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source)
at javax.swing.JComponent.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.saveInternal(Unknown Source)
at java.awt.AWTEventMulticaster.save(Unknown Source)
at java.awt.Component.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeArray(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.access$300(Unknown Source)
at java.io.ObjectOutputStream$PutFieldImpl.writeFields(Unknown Source)
at java.io.ObjectOutputStream.writeFields(Unknown Source)
at java.util.Vector.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
java.io.NotSerializableException: java.io.NotSerializableException: org.python.core.packagecache.SysPackageManager
This experiment is of little importance, because it is certainly not the final goal. It was just to figure out if I could serialize it locally.
The final goal is to save it on the MySql database and extract it exactly as it was saved.
So I need to understand 3 things:
how to serialize JFrame with Jython (assuming serialization is the best way to "package" a filled JFrame for a database, if there's a better way don't hesitate to say so)
what kind of data to set on Mysql (assuming MySql is the perfect dbms to do this, if there are better technologies, don't hesitate to say it!) and if you need to make a particular query
how to deserialize it to see it exactly as I left it (assuming deserialization is the best way to retrieve the JFrame)
Thank you so much in advance my saviors (if there are any)

Firstly, Java Serialization is a bad idea at the best of times. The Secure Coding Guidelines for Java SE says "Note: Deserialization of untrusted data is inherently dangerous and should be avoided." Unfortunately that text is no longer in red.
It is even more problematic in this case as that data will just be in a blob in the database, and Swing doesn't guarantee serialisation compatibility between versions (perhaps even updates?).
That out of the way: From the stracktrace, the problem object is a SysPackageManager somewhere within ConcurrentHashMap itself within ConcurrentHashMap itself, which you probably don't want to keep.
Setting the system property sun.io.serialization.extendedDebugInfo (may change) to true will give some more information as to how the object is referenced.
Clearly JFrame is too much. There are better ways to store data.

Tom has covered reasons of error and possible ways to debug further
I will try to address the 3 things you asked in detail with java code:
How to serialize ? - Answered below
Which datatype to use to create mysql column to store this data ? - I would say mediumblob in case of mysql, blob might to too small and longblob might be too big. I used longtext as well and it works as expected without any issues, but its really long answer to explain why blob and not text fields. May be this stackoverflow answer will throw more light - What column type should be used to store serialized data in a mysql db?
How to de-serialize and use ? - Answered below
Moving to answer:
You can achieve this in few steps
create JFrame
serializing java object to mysql database - this is as simple as
preparedStatement.setObject(jframe_object_to_save_to_database);
pstmt.executeUpdate();
de-serializing java object from mysql database and converting it into JFrame object - this is not that straight forward, but not that complicate too, my approch will be of 4 steps like below
3.a. Just read your column value as bytes array
3.b. create a ByteArrayInputStream object of the bytes array we got from database
3.c. create ObjectInputStream from ByteArrayInputStream
3.d. use ObjectInputStream.readObject() method to get de-serialized object
These steps are covered in the below code snippet
byte[] buf = rs.getBytes(1);
ObjectInputStream objectIn = null;
if (buf != null)
objectIn = new ObjectInputStream(new ByteArrayInputStream(buf));
Object deSerializedObject = objectIn.readObject();
Now as we have the de-serialized object ready for our use (from 3.d), you can parse it into a JFrame object easily and use it as you need
Jframe deSerializedObject = (JFrame) objectIn.readObject();
Below is the complete java implementation that I have, it is a simple JFrame working code with mysql database, please follow Step 1 thru Step 5 which I wrote as comments in the code and also read the Note that I mentioned in deSerializeJavaObjectFromDB method
import java.awt.FlowLayout;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Properties;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class SerializeToDatabase {
private static final String SQL_CREATE_TABLE = "create table if not exists serialized_java_objects (object_name varchar(1000), serialized_object blob)";
private static final String SQL_SERIALIZE_OBJECT = "INSERT INTO serialized_java_objects(object_name, serialized_object) VALUES (?, ?)";
private static final String SQL_DESERIALIZE_OBJECT = "SELECT serialized_object FROM serialized_java_objects limit 1";
public static void createTable(Connection connection) throws SQLException {
connection.createStatement().executeUpdate(SQL_CREATE_TABLE);
}
public static void serializeJavaObjectToDB(Connection connection,
Object objectToSerialize) throws SQLException {
PreparedStatement pstmt = connection
.prepareStatement(SQL_SERIALIZE_OBJECT);
// just setting the class name
pstmt.setString(1, objectToSerialize.getClass().getName());
pstmt.setObject(2, objectToSerialize);
pstmt.executeUpdate();
pstmt.close();
System.out.println("Java object serialized to database. Object: " + objectToSerialize);
}
/**
* To de-serialize a java object from database
*
* #throws SQLException
* #throws IOException
* #throws ClassNotFoundException
*/
public static Object deSerializeJavaObjectFromDB(Connection connection) throws SQLException, IOException,
ClassNotFoundException {
PreparedStatement pstmt = connection.prepareStatement(SQL_DESERIALIZE_OBJECT);
ResultSet rs = pstmt.executeQuery();
rs.next();
//NOTE - below is the most basic way of retrieving data from result set, works perfect for general data
//Object object = rs.getObject(1);
//NOTE - below is the way how we need to implement to retrieve serialized objects from resultset
byte[] buf = rs.getBytes(1);
ObjectInputStream objectIn = null;
if (buf != null)
objectIn = new ObjectInputStream(new ByteArrayInputStream(buf));
Object deSerializedObject = objectIn.readObject();
rs.close();
pstmt.close();
System.out.println("Java object de-serialized from database. Object: "
+ deSerializedObject + " Classname: "
+ deSerializedObject.getClass().getName());
return deSerializedObject;
}
public static Connection getMySqlConnection(String ipAddr, String portNumber, String db, String userName, String password) throws SQLException {
Connection mysqlConn = null;
Properties properties = new Properties();
properties.put("user", userName);
properties.put("password", password);
mysqlConn = DriverManager.getConnection("jdbc:mysql://"+ipAddr+":"+portNumber+"/"+db, properties);
return mysqlConn;
}
/**
* Serialization and de-serialization of java object from mysql
*
* #throws ClassNotFoundException
* #throws SQLException
* #throws IOException
*/
public static void main(String args[]) throws ClassNotFoundException,
SQLException, IOException {
//step 1 - create mysql connection
Connection connection = getMySqlConnection("192.168.1.119", "3306", "xxx", "xxx", "xxx");
//step 2 - create JFrame
JFrame frame = new JFrame("JFrame Example");
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout());
JLabel label = new JLabel("JFrame By Example");
JButton button = new JButton();
button.setText("Button");
panel.add(label);
panel.add(button);
frame.add(panel);
frame.setSize(200, 300);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//uncomment below line if you want to see the JFrame before persisting data
//frame.setVisible(true);
//step 3 - create table
createTable(connection);
//step 4 - serializing java object to mysql database
serializeJavaObjectToDB(connection, frame);
//step 5 - de-serializing java object from mysql database and converting it into JFrame object
JFrame objFromDatabase = (JFrame) deSerializeJavaObjectFromDB(connection);
//setVisible(true) will show the JFrame as is, what ever we have persisted
objFromDatabase.setVisible(true);
//finally close the connection
connection.close();
}
}
Note1: I have no jython setup, so I am unable to provide python/jython code snippet here. But I am trying to answer this in pure java, I think you can relate it easily to your need in jython (as the classes that I've used do not vary)
Note2: I did not want to debate if persistence of serialization is right or wrong, that depends on type of application, type of users, type of project and many other scenarios. You are better judge for your case
Note3: This post helped me to answer this question better - https://javapapers.com/core-java/serialize-de-serialize-java-object-from-database/

Exception in thread "main" java.lang.SecurityException: Prohibited package name: java.sql

I have a jar generated with jdk 1.6, it's working fine with jdk 1.7 and 1.7 but I get the following exception when trying to run it with 1.9 :
Exception in thread "main" java.lang.SecurityException: Prohibited package name: java.sql
at java.base/java.lang.ClassLoader.preDefineClass(Unknown Source)
at java.base/java.lang.ClassLoader.defineClass(Unknown Source)
at java.base/java.security.SecureClassLoader.defineClass(Unknown Source)
at java.base/java.net.URLClassLoader.defineClass(Unknown Source)
at java.base/java.net.URLClassLoader.access$100(Unknown Source)
at java.base/java.net.URLClassLoader$1.run(Unknown Source)
at java.base/java.net.URLClassLoader$1.run(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.net.URLClassLoader.findClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.base/java.lang.Class.getMethodsRecursive(Unknown Source)
at java.base/java.lang.Class.getMethod0(Unknown Source)
at java.base/java.lang.Class.getMethod(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:57)
my main class :
package eai_principale;
import com.siebel.data.SiebelException;
import java.io.IOException;
import java.sql.SQLException;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
public class MainExecute
{
public static void main(String[] args)
throws SQLException, SiebelException, ParserConfigurationException, SAXException, IOException
{
System.out.println("-----------------START EAI CONNECTOR EXECUTION------------------");
Principale execute = new Principale();
String ligneId = args[0];
String path = args[1];
execute.execute(ligneId, path);
System.out.println("-----------------END EAI CONNECTOR EXECUTION------------------");
}
}
Could you help me ?
I am using Eclipse, and I am using jdbc lib .
Thx

Looks like a bug in Eclipse JDT, specifically in the jarinjarloader part. It is referenced as Bug 525885 - jarinjarloader with jdbc jar does not work in jre9 in Eclipse Bugzilla.
The bugzilla article suggests that using a standard MANIFEST could be a workaround:
The thing is that my jar will execute in jre9 if I manually remove the jarinjarloader portion and use a standard MANIFEST file.

Microsoft Translator API error retrieving translation

I'm simply trying to run this sample code below:
import com.memetix.mst.language.Language;
import com.memetix.mst.translate.Translate;
public class Translator {
public static void main(String[] args) throws Exception {
Translate.setClientId("ID GOES HERE");
Translate.setClientSecret("SECRET GOES HERE");
String translatedText = Translate.execute("Bonjour le monde",
Language.FRENCH, Language.ENGLISH);
System.out.println(translatedText);
}
}
and I'm getting the following Exception:
Exception in thread "main" java.lang.Exception: [microsoft-translator-api] Error retrieving translation : datamarket.accesscontrol.windows.net
at com.memetix.mst.MicrosoftTranslatorAPI.retrieveString(MicrosoftTranslatorAPI.java:202)
at com.memetix.mst.translate.Translate.execute(Translate.java:61)
at Translator.main(Translator.java:10)
Caused by: java.net.UnknownHostException: datamarket.accesscontrol.windows.net
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(Unknown Source)
at com.memetix.mst.MicrosoftTranslatorAPI.getToken(MicrosoftTranslatorAPI.java:133)
at com.memetix.mst.MicrosoftTranslatorAPI.retrieveResponse(MicrosoftTranslatorAPI.java:160)
at com.memetix.mst.MicrosoftTranslatorAPI.retrieveString(MicrosoftTranslatorAPI.java:199)
... 2 more
I know it seems like I'm not even trying to figure this out on my own but I'm a complete beginner and can't really understand the Exception trace at all by myself. I'm pretty sure I got the right client Secret. In my azure account I only see an application ID and an Object ID. I'm using the application ID as the client ID.
Does anyone have any ideas on what might be causing this? Any help is greatly appreciated.
Thank you!

The third party Java wrapper boatmeme/microsoft-translator-java-api for MS Azure Translator API is too old & unavailable, because it wrappered the old Microsoft Translator - Text Translation which is old & unavailable now.
There is a notice at the page top of the site Azure datamarket.
DataMarket and Data Services are being retired and will stop accepting new orders after 12/31/2016. Existing subscriptions will be retired and cancelled starting 3/31/2017. Please reach out to your service provider for options if you want to continue service.
For using the new Azure Translator API on Azure portal, you need to refer to the document Announcements: Microsoft Translator Moves to the Azure portal to know how to create the new one on Azure portal and use it via the new REST APIs. Meanwhile, just as reference, you can see my answer in Java for the other SO thread Microsoft Translator API Java, How to get client new ID with Azure.
Hope it helps.

ProGuard difficulties when obfuscating with libraries

While trying to use ProGuard (4.9) to obfuscate and optimise a desktop application everything works up until I use something from an external library such as JSoup.connect("http://google.com/").get();. I would get the following error:
Exception in thread "Thread-2" java.lang.ExceptionInInitializerError
at org.jsoup.b.l.<clinit>(Unknown Source)
at org.jsoup.b.f.<init>(Unknown Source)
at org.jsoup.b.e.<init>(Unknown Source)
at org.jsoup.c.bh.b(Unknown Source)
at org.jsoup.c.bh.a(Unknown Source)
at org.jsoup.c.b.a(Unknown Source)
at org.jsoup.c.D.a(Unknown Source)
at org.jsoup.a.a.a(Unknown Source)
at org.jsoup.a.i.e(Unknown Source)
at org.jsoup.a.e.a(Unknown Source)
at package.a.a(Unknown Source)
at package.a.b(Unknown Source)
at package.w.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at java.util.Properties$LineReader.readLine(Unknown Source)
at java.util.Properties.load0(Unknown Source)
at java.util.Properties.load(Unknown Source)
at org.jsoup.b.k.d(Unknown Source)
at org.jsoup.b.k.<clinit>(Unknown Source)
... 14 more
I have tried searching for a solution but the answer would always be for an android application. With no luck I have attempted the following:
Turn off Use mixed-class names
Added to config -keep public enum * { public static **[] values(); public static ** valueOf(java.lang.String); }
Recently, going through with this process using ProGuard 5.2, not much has changed. Here is the updated process to fixing the issue:
Go to the Obfuscation tab.
Go to the bottom for Keep additional class names and class member names
Click on Add... to the right
Go down to Extends/implements class and type in your library matching the examples below then press Ok. Repeat for every library.
For JSoup: org.jsoup.**
For Apache Commons Net: org.apache.commons.net.**
For SwingX: org.jdesktop.**
For GSON: org.google.gson.**
Go to the Information tab.
Turn off Skip non-public library class members
Turn on Ignore warnings about possibly erroneous input
Process!

ISSUE java.lang.IllegalStateException: zip file closed

I have created a jar file which throws the below error, it's a simple swing app which inserts a row when I press a button, not sure where I am going wrong please advise.
private void jButton20ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
setatmid(jTextField2.getText());
setaa10(Integer.parseInt(jTextField3.getText()));
setaa20(Integer.parseInt(jTextField4.getText()));
setaa50(Integer.parseInt(jTextField5.getText()));
setaa100(Integer.parseInt(jTextField6.getText()));
try{
System.err.println("Inserting values in Mysql database table!");
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "agents";
String driver = "com.mysql.jdbc.Driver";
Class.forName(driver);
con = DriverManager.getConnection(url+db,"root","");
Statement st = con.createStatement();
String query="INSERT INTO schedule_data (`s_ID`, `schedule_date`, `atmID`, `notification`) VALUES ('"+System.currentTimeMillis()+"','2010-09-15','"+getatmid()+"','null')";
st.executeUpdate(query);
System.err.println("1 row affected");
} catch(Exception e) {
e.printStackTrace();
}
}
Error:
java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(Unknown Source)
at java.util.zip.ZipFile.getEntry(Unknown Source)
at java.util.jar.JarFile.getEntry(Unknown Source)
at java.util.jar.JarFile.getJarEntry(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getResource(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at atmguis.atm.jButton20ActionPerformed(atm.java:588)
at atmguis.atm.access$1600(atm.java:25)
at atmguis.atm$17.actionPerformed(atm.java:226)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

The method involved is being called from the Event Dispatch Thread. I'm sure this is a part of the problem. You are trying to access the JAR file containing the com.mysql.jdbc.Driver class from this thread. This is where the error is being thrown. I have to wonder if there is some sort of concurrency issue here. Here are a couple of general notes, things that should be addressed. Once you have addressed these issues, see if you are still having a problem.
You should not be doing a database query from inside the EDT. You should collect the information you need from the swing components and then use a Runnable object to execute the SQL query on a different thread. Do a search on SO for executing code on or off the EDT to find examples of how to do this. This will ensure that your UI doesn't lock up while you wait for your SQL results.
Opening and closing a database connection every time you need one is something better left to the SQL driver and its built-in connection pooling abilities. This method should be declared on some sort of controller object which already has a reference to the SQL connection. Then, when this method is called, you call your thread as in the last step, and that thread uses the reference to the SQL connection that it already has.
This will take the line that's throwing the exception and move it out of the EDT into some sort of setup phase, presumably where you will have better luck accessing the class file. Certainly it will be a much more controlled environment than within the EDT. If there continues to be a problem accessing it, it will be easier to debug in the more controlled environment.
As an added bonus, you will also be designing your application in much more robust way.