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03.06.2008 at 06:54PM PST, ID: 23221939

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9.0

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space ????

Zone: Java Programming Language

Tags: Java

Hello Experts,

Im trying to execute the code below but i get an error "Exception in thread "main" java.lang.OutOfMemoryError: Java heap space"

Can anyone tell me what's going wrong, and how can this be solved?

Thanks in advance!

         
           
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             public class ListModel extends JFrame implements ActionListener {
	 
	  JList list;
	 
	  DefaultListModel model;
	  
	  private JMenu fileMenu = new JMenu("File");
	  private JMenuBar menuBar = new JMenuBar();
	  private JMenuItem saveItem = new JMenuItem("Save");
	  private JMenuItem openItem = new JMenuItem("Load");
	  private JMenuItem exitItem = new JMenuItem("Exit");
	  private String filename = null;  
	  
	  int counter = 100;
	 
	  public ListModel() {
	            
	                add(new JScrollPane(list));
	                JFrame frame = new JFrame("List Model");
	            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	            frame.setContentPane(new ListModel());
	            frame.setSize(260, 200);
	            frame.setVisible(true);
	            
	            fileMenu.add(openItem);
	            fileMenu.add(saveItem);
	            fileMenu.add(exitItem);
	            openItem.addActionListener(this);
	            saveItem.addActionListener(this);
	            exitItem.addActionListener(this);
	            menuBar.add(fileMenu);
	            setJMenuBar(menuBar);
	            setLayout(new BorderLayout());
	            model = new DefaultListModel();
	            JList list = new JList(model);
	            JScrollPane pane = new JScrollPane(list);
	            final JButton addButton = new JButton("Add Element");
	            JButton removeButton = new JButton("Remove Element");
	    
	 
	    addButton.addActionListener(new ActionListener() {
	      public void actionPerformed(ActionEvent e) {
	                  String element = JOptionPane.showInputDialog(this);
	                  if (element == null)
	                  {return;
	                  }else{
	                          model.addElement(element);
	                  }
	 
	      }
	    });
	    
	    removeButton.addActionListener(new ActionListener() {
	      public void actionPerformed(ActionEvent e) {
	        if (model.getSize() > 0)
	          model.removeElementAt(0);
	      }
	    });
	    
	     add(pane, BorderLayout.NORTH);
	    add(addButton, BorderLayout.WEST);
	    add(removeButton, BorderLayout.EAST);
	  }
	  
	  public void actionPerformed(ActionEvent e) {
	      if (e.getSource() == openItem)
	                try {
	                        loadFile();
	                } catch (IOException e1) {
	                        e1.printStackTrace();
	                }
	        else if (e.getSource() == exitItem)
	        System.exit(0);
	  }
	  
	  private DefaultListModel loadFile() throws IOException {
	            JFileChooser fc = new JFileChooser();
	            String name = null;
	            if (fc.showOpenDialog(null) != JFileChooser.CANCEL_OPTION)
	              name = fc.getSelectedFile().getAbsolutePath();
	            else
	              return model;  
	            FileInputStream stream = new FileInputStream(name);
	                InputStreamReader reader = new InputStreamReader(stream);
	                BufferedReader buffer = new BufferedReader(reader);
	                
	                String line = buffer.readLine();            
	                String[] words = line.split("\\s+"); 
	                        for(int j=0;j<words.length;j++) 
	                        {
	                                model.addElement(new String(words[j]));
	                                 model.addElement(words[j]);
	                }
	                                return model;
	         
	            }
	 
	  public static void main(String s[]) {
	          new ListModel();
	  }
	 
	public ListModel getModel() {
	        return null;
	}
	 
	public String getElementAt(int i) {
	        return null;
	}
	  
	  
	  
	}//end of class
 
	class RadioButton1 extends JApplet implements ItemListener {
	          private Container Panel;
	          private LayoutManager Layout;
	          private JRadioButton Unsorted;
	          private JRadioButton Ascending;
	          private JRadioButton Descending;
	 
	          public RadioButton1 () {
	            Layout = new FlowLayout ();
	            Panel = getContentPane ();
	            Unsorted = new JRadioButton ("Unsorted");
	            Ascending = new JRadioButton ("Ascending");
	            Descending = new JRadioButton ("Descending");
	            
	            Panel.setLayout (Layout);
	            Panel.add (Unsorted);
	            Panel.add (Ascending);
	            Panel.add (Descending);
	            
	            Unsorted.addItemListener (this);
	            Ascending.addItemListener (this);
	            Descending.addItemListener (this);
	          }
	 
	          public void itemStateChanged (ItemEvent e) {
	            ItemSelectable Source;
	            Source = e.getItemSelectable();
	            if (Source == Unsorted) {
	                        //unsorted jlist        
	            } else if (Source == Ascending) {
	                        sortList(null);
	            } else if (Source == Descending) {
	                //descending jlist
	            }
	            
	          }
	          
	          void sortList(JList list)
	          {
	        	javax.swing.ListModel model = list.getModel();	            
	        	int numItems = model.getSize();
	            String[] a = new String[numItems];
	            for (int i=0;i<numItems;i++)
	            {
	              a[i] = (String)model.getElementAt(i);
	            }
	            sortArray(a);
	            list.setListData(a);
	            list.revalidate();
	          }
	          void sortArray(String[] strArray)
	          {
	            if (strArray.length == 1)    
	              return;
	            Collator collator = Collator.getInstance();
	            String strTemp;
	            for (int i=0;i<strArray.length;i++)
	            {
	              for (int j=i+1;j<strArray.length;j++)
	              {
	                if (collator.compare(strArray[i], strArray[j]) > 0)
	                {
	                  strTemp = strArray[i];
	                  strArray[i] = strArray[j];
	                  strArray[j] = strTemp;
	                }
	              }
	            }
	          }
	 
	 
	 
	}

           
         

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Question Stats

Zone: Programming

Question Asked By: perdoname_

Solution Provided By: Ajay-Singh

Participating Experts: 1

Solution Grade: B

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