Question

I am having trouble opening multiple objects that were serialized into a single .bin file. Right now, I can only get one object to be read in when I attempt to open the file. After the first object is read, the error message is displayed (and no further objects are read). My code looks like the following:

val ois = new ObjectInputStream(new BufferedInputStream(newFileInputStream(chooser.selectedFile)))
val toRead:Int = ois.readInt()
    for (i <- 0 to toRead) {
      ois.readObject() match {
         case anObject : myObject =>
           aMutableBuffer += anObject
         case _ =>
      }
    ois.close()
    }

The error that I am getting is a lot of the following:

Exception in thread "AWT-EventQueue-0" java.security.PrivilegedActionException:java.security.PrivilegedActionException: java.io.IOException: Stream closed
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:649)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.security.PrivilegedActionException: java.io.IOException: Stream closed
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:652)
at java.awt.EventQueue$2.run(EventQueue.java:650)
... 9 more
Caused by: java.io.IOException: Stream closed
at java.io.BufferedInputStream.getBufIfOpen(BufferedInputStream.java:145)
at java.io.BufferedInputStream.read(BufferedInputStream.java:241)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2248)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2541)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2551)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1296)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
atABCk.PhotoshopApp$$anonfun$ABCPhotoshopApp$$fileOpenPicture$1.apply$mcVI$sp(PhotoshopApp.scala:32)
at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:75)
at ABC.PhotoshopApp$.ABC$PhotoshopApp$$fileOpenPicture(PhotoshopApp.scala:31)
at ABC.PhotoshopApp$$anon$9$$anon$11$$anon$1$$anonfun$2.apply$mcV$sp(PhotoshopApp.scala:111)
at scala.swing.Action$$anon$2.apply(Action.scala:60)
at scala.swing.Action$$anon$1.actionPerformed(Action.scala:78)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
at com.apple.laf.AquaMenuItemUI.doClick(AquaMenuItemUI.java:137)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.menuDragMouseReleased(BasicMenuItemUI.java:913)
at javax.swing.JMenuItem.fireMenuDragMouseReleased(JMenuItem.java:568)
at javax.swing.JMenuItem.processMenuDragMouseEvent(JMenuItem.java:465)
at javax.swing.JMenuItem.processMouseEvent(JMenuItem.java:411)
at javax.swing.MenuSelectionManager.processMouseEvent(MenuSelectionManager.java:305)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:852)
at java.awt.Component.processMouseEvent(Component.java:6373)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6138)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4735)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4565)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4282)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
at java.awt.Container.dispatchEventImpl(Container.java:2129)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4565)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:679)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:638)
at java.awt.EventQueue$1.run(EventQueue.java:636)
... 14 more

This only happens when I read in an object to my buffer that keeps track of the objects. Moreover, I am able to save the file correctly (as I have done tests to ensure everything got there). Anyone have any ideas what is going on here?

Answer 1

You are closing your Stream ois at the end, but inside the loop. Then you try to read from it on the first line of the loop. Which obviously failes with a IOException: Stream closed