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Thread: Table with CustomModel when clicked shows old entry

  1. #1
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    Default Table with CustomModel when clicked shows old entry

    Hi,

    I have a problem with a Table using a CustomModel I have created.
    The first time everything works fine, but whenever I re-create the Table and the user clicks on it, the content of the table changes into the old ones.

    Here is a part of the code.
    I cannot provide a SSCE for the moment, but I can give an idea of the whole thing.

    private static void showResults() {
     
    		// Creating JTable
    		CustomTable Table = new CustomTable();
     
    	}
     
     
    	public static class CustomTable extends JPanel {
     
    		public CustomTable() {
     
     
    			CustomTableModel TableModel = new CustomTableModel();
     
     
    			JTable Table = new JTable(TableModel);
     
    			// Create the scroll pane and add the table to it.
    			JScrollPane scrollPane = new JScrollPane(Table);
     
    			Table.setFocusable(false);
     
    			// Add the scroll pane to this frame
    			Frame.add(scrollPane, BorderLayout.CENTER);
    			scrollPane.setBounds(100, 300, 600, 250);
     
    		}
     
    		class CustomTableModel extends AbstractTableModel {
     
     
     
    			private String rows[][] = Search();
     
    			private String headers[] = { "", "", "", "", ""};
     
    			public int getColumnCount() {
    				return headers.length;
    			}
     
    			public int getRowCount() {
    				return rows.length;
    			}
     
    			public String getColumnName(int col) {
    				return headers[col];
    			}
     
    			public Object getValueAt(int row, int col) {
    				return rows[row][col];
    			}
     
    			// Table not editable
    			public boolean isCellEditable(int row, int col) {
     
    				return false;
     
    			}
     
     
    		}


    Basically I recreate the Table every time the user clicks on a button for searching. The results are correct but whenever I click on the table, the cell/row I click on changes its values on the first one.

    I also tried to remove the possibility of selecting an item of the Table, but the problem still remains.


    I also tried to remove it from the Frame (using Frame.remove(Table) ) and revalidate it. Also repaint and so on. Also tried to remove all the content of the Table before recreating a new one, but nothing...
    Last edited by Nesh108; November 6th, 2011 at 08:45 AM.


  2. #2
    Super Moderator copeg's Avatar
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    Default Re: Table with CustomModel when clicked shows old entry

    the cell/row I click on changes its values on the first one
    Try overriding the setValueAt in AbstractTableModel to set the appropriate value

  3. #3
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    Default Re: Table with CustomModel when clicked shows old entry

    Tried, but same problem:

     
    public void setValueAt(int row, int col)
    {
     
    super.setValueAt(Table, row, col);
    }

  4. #4
    Super Moderator copeg's Avatar
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    Default Re: Table with CustomModel when clicked shows old entry

    See the API for AbstractTableModel - that is not overriding the setValueAt method.

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    Default Re: Table with CustomModel when clicked shows old entry

    I have googled for a while and tried some ways to override the setValueAt method, I tried with:

    			public void setValueAt(Object value, int row, int col) {
     
    				   rows[row][col] = value.toString();
    			       this.fireTableCellUpdated(row, col);
    			}

    But the result is still the same.
    I just wanted to give an update, I will try to search for more...

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    Default Re: Table with CustomModel when clicked shows old entry

    Quote Originally Posted by Nesh108 View Post
    Hi,

     
    		class CustomTableModel extends AbstractTableModel {
     
    			private String rows[][] = Search();
     
     
    		}
    The above section caused the problem. The rows object is initialized only once by the Search() function. You should re-design the CustomTableModel, for example, adding some methods to update the search result.

    java exception
    Last edited by hns1984; January 11th, 2012 at 05:58 PM.

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    Default Re: Table with CustomModel when clicked shows old entry

    Thanks!!!!
    Oh finally!!!

    here how I fixed the problem:

     
    			//Update
    			public void updateResult(){
     
    				rows =Search();
     
    				this.fireTableDataChanged();
     
     
    			}

    In this way I do not re-create the table each time I search for new results.
    Last edited by Nesh108; November 9th, 2011 at 05:42 AM.

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