StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POWhy java.io.NotSerializableException: javax.swing.plaf.metal.MetalFileChooserUI?
primarykey
Id
6432098
data
AcceptedAnswerId
6432853
AnswerCount
3
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2011-06-21T21:18:11.047
FavoriteCount
0
LastActivityDate
2012-11-21T11:31:01.413
LastEditDate
2011-06-22T10:15:19.423
LastEditorUserId
809270
OwnerUserId
809270
ParentId
0
PostTypeId
1
Score
0
ViewCount
1323
LastEditorDisplayName
text
Body
I basically want to serialize an ArrayList in Java, and here is the code that apparently needs to be changed. (EDIT: pasted entire class) <pre><code>import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.ArrayList; import javax.swing.*; public class GraphEditSerial extends JFrame{ //stores all dots on the MainPanel private ArrayList<Circle> circles = new ArrayList<Circle>(); class Circle implements Serializable{ private static final long serialVersionUID = -8364830119753788192L; private int x, y; public String toString(){ return "("+x+", "+y+")"; } public Circle(int x, int y) { this.x = x; this.y = y; } } //variables for current workmode private boolean canInsert = false; private boolean canDelete = false; private boolean canMove = false; private boolean wasMoved = false; //defines a JPanel and adds a MouseListener class MainPanel extends JPanel implements MouseListener{ //constructor public MainPanel(){ setBackground(Color.white); addMouseListener(this); } //paints a blue spot on specified location public void paint(Graphics g) { super.paint(g); g.setColor(Color.blue); for (Circle k: circles) { g.fillOval(k.x - 5, k.y - 5, 10, 10); } } public void mouseClicked(MouseEvent e) { //user wants to add a circle if(canInsert){ //adds new circle to ArrayList and displays all circles circles.add(new Circle(e.getX(), e.getY())); repaint(); } //user wants to delete a circle else if(canDelete){ //checking if clicked position is within 4px of existing circles for (int k=0; k<circles.size();k++){ Circle c = circles.get(k); if(c.x-e.getX()<=4 &&c.x-e.getX()>=-4 &&c.y-e.getY()<=4 &&c.y-e.getY()>=-4){ //removes circle that is within 4 px of clicked position circles.remove(k); } } repaint(); } } //used to move existing circles, but only if current workmode = move public void mousePressed(MouseEvent e) { //current workmode has to be "move" if(canMove==true){ //checking if clicked position is within 4px of existing circles for (int k=0; k<circles.size();k++){ Circle c = circles.get(k); if(c.x-e.getX()<=4 &&c.x-e.getX()>=-4 &&c.y-e.getY()<=4 &&c.y-e.getY()>=-4){ //removes circle that is within 4 px of clicked position circles.remove(k); wasMoved=true; } } } } //displays moved circle at current position of mouse public void mouseReleased(MouseEvent e) { //current workmode has to be "move" if(canMove==true){ //checking if user clicked on an existing circle before if(wasMoved==true){ circles.add(new Circle(e.getX(), e.getY())); repaint(); wasMoved=false; } } } //not assigned public void mouseEntered(MouseEvent e) {} public void mouseExited(MouseEvent e) {} } //Menu JMenuBar mb = new JMenuBar(); JMenu graph = new JMenu("Graph"); JMenu vertex = new JMenu("Vertex"); JMenuItem open = new JMenuItem("open"); JMenuItem mnew = new JMenuItem("new"); JMenuItem save = new JMenuItem("save"); JMenuItem insert = new JMenuItem("insert"); JMenuItem move = new JMenuItem("move"); JMenuItem delete = new JMenuItem("delete"); JMenuItem none = new JMenuItem("none"); //FileChooser JFileChooser fc; //main panel MainPanel main = new MainPanel(); //bottom row JPanel bottomrow = new JPanel(new GridLayout(1,2)); JLabel l1 = new JLabel("Selected Action: ", SwingConstants.RIGHT); JTextField l2 = new JTextField("none", SwingConstants.LEFT); //setting up a Menu with MenuItems, Dimensions, ActionListeners, etc... public GraphEditSerial(String s){ super(s); //adding menu items to menus graph.add(open); graph.add(mnew); graph.add(save); vertex.add(insert); vertex.add(move); vertex.add(delete); vertex.add(none); fc = new JFileChooser(); //Label l2 changes accordingly to selected MenuItem open.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Graph: open"); canInsert=false; canDelete=false; canMove=false; repaint(); int returnVal = fc.showOpenDialog(GraphEditSerial.this); if (returnVal == JFileChooser.APPROVE_OPTION) { File f = fc.getSelectedFile(); try{ FileInputStream fis = new FileInputStream(f); ObjectInputStream ois = new ObjectInputStream(fis); ArrayList<Circle> a = (ArrayList<Circle>)ois.readObject(); circles = a; repaint(); } catch (ClassNotFoundException e) {} catch (IOException e){} } } }); mnew.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Graph: new"); canInsert=false; canDelete=false; canMove=false; //clears all vertexes circles.clear(); repaint(); } }); save.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Graph: save"); canInsert=false; canDelete=false; canMove=false; repaint(); int returnVal = fc.showSaveDialog(GraphEditSerial.this); if (returnVal == JFileChooser.APPROVE_OPTION) { String datname = fc.getSelectedFile().getAbsolutePath().toString(); try{ FileOutputStream fos = new FileOutputStream(datname); ObjectOutputStream oos = new ObjectOutputStream(fos); oos.writeObject((ArrayList<Circle>) circles); oos.close(); } catch (IOException e){ l2.setText(e.toString()); e.printStackTrace(); } } } }); insert.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Vertex: insert"); canInsert=true; canDelete=false; canMove=false; repaint(); } }); move.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Vertex: move"); canInsert=false; canDelete=false; canMove=true; repaint(); } }); delete.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("Vertex: delete"); canInsert=false; canDelete=true; canMove=false; repaint(); } }); none.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { l2.setText("none"); canInsert=false; canDelete=false; canMove=false; repaint(); } }); bottomrow.add(l1); bottomrow.add(l2); main.setPreferredSize(new Dimension(500,300)); main.setOpaque(true); main.setBackground(Color.WHITE); mb.setPreferredSize(new Dimension(500, 20)); mb.add(graph); mb.add(vertex); setJMenuBar(mb); add(main, BorderLayout.CENTER); add(bottomrow, BorderLayout.PAGE_END); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); pack(); setVisible(true); setLocationRelativeTo(null); } public static void main(String[] arg){ //new GraphEditor("MyGraphEditor"); new GraphEditSerial("MyGraphEditor"); } } </code></pre> I did it without the JFileChooser and just specified a filename, and it worked like a charm. I could also deserialize it without problems. But as soon as I use JFileChooser, I get "java.io.NotSerializableException: javax.swing.plaf.metal.MetalFileChooserUI" Anyone got an idea? EDIT: this is what e.printStackTrace() prints <pre><code>java.io.NotSerializableException: javax.swing.plaf.metal.MetalFileChooserUI 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.GeneratedMethodAccessor6.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.GeneratedMethodAccessor10.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.defaultWriteObject(Unknown Source) at java.awt.Window.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 java.awt.Window.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.util.ArrayList.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 GraphEditSerial$3.actionPerformed(GraphEditSerial.java:202) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.AbstractButton.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.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$000(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.awt.EventQueue$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.security.AccessControlContext$1.doIntersectionPrivilege(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 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) </code></pre>
Tags
<java><user-interface><serialization><jfilechooser>
Title
Why java.io.NotSerializableException: javax.swing.plaf.metal.MetalFileChooserUI?
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USEdgarJames
UserOwnerUserId
1. USEdgarJames
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
 singulars
 PostTypePostTypeId
 PTAnswer
3. PO
 singulars
 PostTypePostTypeId
 PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.