We Keep Coding

How to load modifications made in native java classes?

Hi,
I'm trying to execute a jar file, overwriting some java originals interfaces to connect with the database, changing the method setBoolean to receive an object like parameter.
That's the original interface method:
void setBoolean(int parameterIndex, boolean x) throws SQLException;
That's my change:
void setBoolean(int parameterIndex, Boolean x) throws SQLException;
My changes were made at interface java.sql.PreparedStatement. For my changes to be called, when I start the application I'm using the command:
java -verbose:class -Xbootclasspath/p:C:/Users/user/Desktop/myproject/src/main/java -jar safepdv.jar
With the command "-verbose:class" I can verify that the class with my changes are being loaded.
However, when the method setBoolean is called by the application, he isn't founded, and my return is:
Exception in thread "AWT-EventQueue-0" [Loaded java.lang.Throwable$WrappedPrintStream from C:\Program Files\Java\jre1.8.0_91\lib\rt.jar]
java.lang.NoSuchMethodError: java.sql.PreparedStatement.setBoolean(IZ)V
at com.t2tierp.pafecf.controller.ConfigurationController.updateCS(ConfigurationController.java:613)
at com.t2tierp.pafecf.view.OpenMoviment.validaCamposLogin(OpenMoviment.java:448)
at com.t2tierp.pafecf.view.OpenMoviment.passwordTextSenhaUsuarioActionPerformed(OpenMoviment.java:403)
at com.t2tierp.pafecf.view.OpenMoviment.access$200(OpenMoviment.java:22)
at com.t2tierp.pafecf.view.OpenMoviment$4.actionPerformed(OpenMoviment.java:240)
at javax.swing.JTextField.fireActionPerformed(Unknown Source)
at javax.swing.JTextField.postActionEvent(Unknown Source)
at javax.swing.JTextField$NotifyAction.actionPerformed(Unknown Source)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(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.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(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.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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.pumpEventsForFilter(Unknown Source)
at java.awt.WaitDispatchSupport$2.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(Unknown Source)
at java.awt.Dialog.show(Unknown Source)
at java.awt.Component.show(Unknown Source)
at java.awt.Component.setVisible(Unknown Source)
at java.awt.Window.setVisible(Unknown Source)
at java.awt.Dialog.setVisible(Unknown Source)
at com.t2tierp.pafecf.view.Caixa.verificarMovimentoExistente(Caixa.java:3392)
at com.t2tierp.pafecf.view.Caixa.<init>(Caixa.java:344)
at com.t2tierp.pafecf.view.Caixa$41.run(Caixa.java:2393)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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)
How can I make my method was really called instead of the original method?

The calling code is still trying to pass a null value to the old method's signature (which expects a boolean, and not a Boolean). You would need to recompile the calling code so that it binds to the new method signature: the method signatures to be called are fixed at compile-time.
Also, note that PreparedStatement is an interface - changing its definition is likely to break all classes implementing said interface. Most notably, each JDBC driver will include its own implementation; you would have to recompile the drivers from source to fix this.
It is possible, but ugly and unmaintainable, to decompile the calling code and simply fix it at the point where the null is being passed, and then recompile it. You can automate this to a certain point (think bytecode-editing libraries), but the gist is that not having access to the source code making the bad calls is a severe drawback.

How to solve OPENGL Error? [duplicate]

This question already has an answer here:
Frame Buffer not Supported By this hardware. Java Processing library 2.2.1 and Unfolding Map Error
(1 answer)
Closed 6 years ago.
I have been getting the following error while executing sample code of EarthquakeCityMap.java. If you need java file then I can share.
Exception in thread "AWT-EventQueue-1" javax.media.opengl.GLException: Caught RuntimeException: Framebuffer objects are not supported by this hardware (or driver) Read http://wiki.processing.org/w/OpenGL_Issues for help. on thread AWT-EventQueue-1
at javax.media.opengl.GLException.newGLException(GLException.java:75)
at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1311)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1131)
at javax.media.opengl.awt.GLCanvas$11.run(GLCanvas.java:1394)
at javax.media.opengl.Threading.invoke(Threading.java:223)
at javax.media.opengl.awt.GLCanvas.display(GLCanvas.java:525)
at javax.media.opengl.awt.GLCanvas.paint(GLCanvas.java:579)
at sun.awt.RepaintArea.paintComponent(Unknown Source)
at sun.awt.RepaintArea.paint(Unknown Source)
at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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)
Caused by: java.lang.RuntimeException: Framebuffer objects are not supported by this hardware (or driver) Read http://wiki.processing.org/w/OpenGL_Issues for help.
at processing.opengl.PJOGL$PGLListener.init(PJOGL.java:890)
at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:640)
at jogamp.opengl.GLDrawableHelper.init(GLDrawableHelper.java:662)
at javax.media.opengl.awt.GLCanvas$9.run(GLCanvas.java:1366)
at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1275)
... 28 more
Exception in thread "Animation Thread" java.lang.RuntimeException: Number of texture units not supported by this hardware (or driver)
at processing.opengl.PGL.bindTexture(PGL.java:2646)
at processing.opengl.PGL.createFBOLayer(PGL.java:660)
at processing.opengl.PGL.beginDraw(PGL.java:530)
at processing.opengl.PJOGL.beginDraw(PJOGL.java:617)
at processing.opengl.PGraphicsOpenGL.beginOnscreenDraw(PGraphicsOpenGL.java:6350)
at processing.opengl.PGraphicsOpenGL.beginDraw(PGraphicsOpenGL.java:1696)
at processing.core.PApplet.handleDraw(PApplet.java:2342)
at processing.opengl.PJOGL$PGLListener.display(PJOGL.java:873)
at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:690)
at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:672)
at javax.media.opengl.awt.GLCanvas$10.run(GLCanvas.java:1383)
at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1277)
at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1131)
at javax.media.opengl.awt.GLCanvas$11.run(GLCanvas.java:1394)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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)
Anyone who came across the similar can help me please.
Thanks,
Girish S.

Framebuffer objects are not supported by this hardware (or driver)
You most likely do not have a proper driver installed for your graphics card, or OpenGL is not supported on your card (which is very unlikely, but still possible).

java.sql.SQLSyntaxErrorException: ORA-01795: maximum number of expressions in a list is 1000.how can pass the row in 1000's slot

someone suggest out OR condition in IN condition but params come dynamicaly how we divide it in 1000's slot for OR condition
Stack trace:
java.sql.SQLSyntaxErrorException: ORA-01795: maximum number of expressions in a list is 1000
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:457)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:405)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:889)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:476)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:204)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:540)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:217)
at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:924)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1261)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1419)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3752)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3806)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1667)
at oracle.jbo.server.ViewObjectImpl.getQueryHitCount(ViewObjectImpl.java:4840)
at oracle.jbo.server.ViewObjectImpl.getQueryHitCount(ViewObjectImpl.java:4751)
at oracle.jbo.server.QueryCollection.getEstimatedRowCount(QueryCollection.java:4011)
at oracle.jbo.server.ViewRowSetImpl.getEstimatedRowCount(ViewRowSetImpl.java:2633)
at oracle.jbo.server.ViewObjectImpl.getEstimatedRowCount(ViewObjectImpl.java:10426)
at oracle.adf.model.bc4j.DCJboDataControl.estimateRowCount(DCJboDataControl.java:1553)
at oracle.adf.model.bc4j.DCJboDataControl.getEstimatedRowCount(DCJboDataControl.java:1505)
at oracle.adf.model.binding.DCIteratorBinding.getEstimatedRowCount(DCIteratorBinding.java:3825)
at oracle.jbo.uicli.binding.JUCtrlRangeBinding.getEstimatedRowCount(JUCtrlRangeBinding.java:117)
at oracle.jbo.uicli.jui.JUTableBinding$JUTableModel.getRowCount(JUTableBinding.java:1401)
at javax.swing.JTable.getRowCount(Unknown Source)
at javax.swing.JTable.valueChanged(Unknown Source)
at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
at javax.swing.DefaultListSelectionModel.fireValueChanged(Unknown Source)
at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source)
at javax.swing.DefaultListSelectionModel.changeSelection(Unknown Source)
at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(Unknown Source)
at javax.swing.DefaultListSelectionModel.clearSelection(Unknown Source)
at javax.swing.JTable.clearSelection(Unknown Source)
at javax.swing.JTable.clearSelectionAndLeadAnchor(Unknown Source)
at javax.swing.JTable.tableChanged(Unknown Source)
at javax.swing.table.AbstractTableModel.fireTableChanged(Unknown Source)
at javax.swing.table.AbstractTableModel.fireTableDataChanged(Unknown Source)
at oracle.jbo.uicli.jui.JUTableBinding$JUTableModel.fireTableDataChangedRestoreSelection(JUTableBinding.java:1040)
at oracle.jbo.uicli.jui.JUTableBinding$JUTableModel._refreshLater(JUTableBinding.java:1283)
at oracle.jbo.uicli.jui.JUTableBinding$JUTableModel.access$1000(JUTableBinding.java:967)
at oracle.jbo.uicli.jui.JUTableBinding$JUTableModel$1.run(JUTableBinding.java:1229)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at maxxton.newyse.client.cursor.WaitCursorEventQueue.dispatchEvent(WaitCursorEventQueue.java:50)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.Dialog$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Unknown Source)
at javax.swing.JOptionPane.showOptionDialog(Unknown Source)
at maxxton.newyse.client.error.JErrorHandlerDialog.show(JErrorHandlerDialog.java:435)
at maxxton.newyse.client.error.JErrorHandlerDialog.reportException(JErrorHandlerDialog.java:230)
at maxxton.newyse.client.error.ErrorHandler.showDialog(ErrorHandler.java:43)
at maxxton.newyse.client.error.ErrorHandler.showDialog(ErrorHandler.java:31)
at maxxton.newyse.client.cursor.WaitCursorEventQueue.dispatchEvent(WaitCursorEventQueue.java:54)
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)

You can accomplish your goal by using OR conditions in the WHERE clause to break up your IN statements into groups of 1,000 items. Here's an example:
SELECT
customer_name
FROM
customer
WHERE
customer_id in (1,2,4,...,1000) OR
customer_id in (1001,1002,...,2000) OR
customer_id in (2001,2002,...,3000)

NullPointerException when trying to copy/paste from/into clipboard

I have an specific issue with copy/paste from my Java application. I made IT utility that we use in our IT Department for Evidence of our IT assessments.
When I try to copy from anything (jTextArea, jTextField, jTable cell, etc..) I receive bellow shown NullPointerException.
This issue appears randomly, I can copy In/Out all I want, but then, let say hour after, I want to copy some information out and this appears, after that I cannot copy anything in or out and only thing that helps is restarting the application. After Restart, I can try to copy anything anywhere, even use Java Toolkit.getDefaultToolkit().getSystemClipboard() function with no error, but again, after some time (usually after one or more hours) it appears again. For this time, there is only one active scheduled method that keeps refreshing the main table from SQL. I don't think that my code will help here is this application have more that 65K rows ant this issue appears randomly anywhere.
But my question is - Is there any special way to treat system Clipboard, or are there any common mistakes that could make such behavior? I found nothing that could help me understand my problem.
I'll appreciate any help or leads whatsoever, thank you:)
Error message:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at java.io.Win32FileSystem.normalize(Unknown Source)
at java.io.Win32FileSystem.getUserPath(Unknown Source)
at java.io.Win32FileSystem.resolve(Unknown Source)
at java.io.File.getAbsolutePath(Unknown Source)
at java.io.File.getAbsoluteFile(Unknown Source)
at java.io.File.toURI(Unknown Source)
at java.awt.datatransfer.SystemFlavorMap$1.run(Unknown Source)
at java.awt.datatransfer.SystemFlavorMap$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.datatransfer.SystemFlavorMap.initSystemFlavorMap(Unknown Source)
at java.awt.datatransfer.SystemFlavorMap.getFlavorToNative(Unknown Source)
at java.awt.datatransfer.SystemFlavorMap.getNativesForFlavor(Unknown Source)
at sun.awt.datatransfer.DataTransferer.getFormatsForFlavors(Unknown Source)
at sun.awt.windows.WDataTransferer.getFormatsForFlavors(Unknown Source)
at sun.awt.datatransfer.DataTransferer.getFormatsForTransferable(Unknown Source)
at sun.awt.windows.WClipboard.setContentsNative(Unknown Source)
at sun.awt.datatransfer.SunClipboard.setContents(Unknown Source)
at GUI.Evidence.EvidenceMain.SaveToClip(EvidenceMain.java:711)
at GUI.Evidence.EvidenceMain.access$800(EvidenceMain.java:65)
at GUI.Evidence.EvidenceMain$4.mouseReleased(EvidenceMain.java:401)
at java.awt.AWTEventMulticaster.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.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
java.io.IOException: cannot transfer non-text data as Reader
at sun.awt.datatransfer.DataTransferer.translateTransferable(Unknown Source)
at sun.awt.windows.WDataTransferer.translateTransferable(Unknown Source)
at sun.awt.windows.WClipboard.setContentsNative(Unknown Source)
at sun.awt.datatransfer.SunClipboard.setContents(Unknown Source)
at javax.swing.TransferHandler.exportToClipboard(Unknown Source)
at javax.swing.TransferHandler$TransferAction.actionPerformedImpl(Unknown Source)
at javax.swing.TransferHandler$TransferAction.access$700(Unknown Source)
at javax.swing.TransferHandler$TransferAction$1.run(Unknown Source)
at javax.swing.TransferHandler$TransferAction$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.TransferHandler$TransferAction$2.run(Unknown Source)
at javax.swing.TransferHandler$TransferAction$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.TransferHandler$TransferAction.actionPerformed(Unknown Source)
at javax.swing.text.JTextComponent.invokeAction(Unknown Source)
at javax.swing.text.JTextComponent.copy(Unknown Source)
at javax.swing.text.DefaultEditorKit$CopyAction.actionPerformed(UnknownSource)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(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.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(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.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(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)

Dynamic sprites with Arraylist - Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

GameCanvas
AppleEnity - http://pastebin.com/ZVyL5fRm
Enity - paste bin.com/r4cqtr8B (cant post more than 2 links yet)
I have problem with adding new, dynamic sprites to my scene. Pressing E (with should spawn randomly an apple) gives me this error:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at start.GameCanvas.dodaj(GameCanvas.java:65)
at start.GameCanvas.keyPressed(GameCanvas.java:149)
at java.awt.Component.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(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 problem is obviously in this line:
jablka.add(new AppleEnity("resources/apple.png", random.nextInt(400), random.nextInt(400)));
...but it's not about jablka variable, but with this expression:
random.nextInt(400)
you never initialize random variable:
private Random random;
Replace the line above with:
private final Random random = new Random();
And you'll be fine. Or just use Math object or RandomUtils.