java.lang.VerifyError

[Andri_JT]

I got the message ON and OFF. previously i got the same message.
without changing the java code...sometime...it runs normally.
Today, i got the problem agian.

Please guide what is the problem?

TIA



Exception in thread "main" java.lang.VerifyError: (class: ResultSetTableModel, method: <init> signature: (Ljava/sql/ResultSet;)V) Constructor must call super() or this()
at ResultSetFrame.actionPerformed(ResultSetTable23.ja va:251)
at javax.swing.JComboBox.fireActionEvent(JComboBox.ja va:1240)
at javax.swing.JComboBox.contentsChanged(JComboBox.ja va:1311)
at javax.swing.AbstractListModel.fireContentsChanged( AbstractListModel.java:100)
at javax.swing.DefaultComboBoxModel.setSelectedItem(D efaultComboBoxModel.java:88)
at javax.swing.DefaultComboBoxModel.addElement(Defaul tComboBoxModel.java:126)
at javax.swing.JComboBox.addItem(JComboBox.java:696)
at ResultSetFrame.<init>(ResultSetTable23.java:220)
at ResultSetTable23.main(ResultSetTable23.java:14)

[Tolls]

Show us the code.
Looks like you have your constructor set up incorrectly in ResultSetFrame.
Show use the constructor around line 251 in ResyltSetTable23.java.

[Andri_JT]

public void actionPerformed(ActionEvent evt)
{ //System.out.println(tableNames + "123");
if (evt.getSource() == tableNames)
{ // show the selected table from the combo box

if (scrollPane != null)
//System.out.println("me");
getContentPane().remove(scrollPane);
try
{ String tableName
= (String)tableNames.getSelectedItem();
if (rs != null) rs.close();
//System.out.println(tableName);
//System.out.println("PROVEN??????");
String query = "SELECT * FROM " + tableName;
rs = stmt.executeQuery(query);
//System.out.println(SCROLLABLE+"z1y2");
if (SCROLLABLE)
modelzyx = new ScrollingResultSetTableModel(rs);
else
modelzyx = new CachingResultSetTableModel(rs);

JTable table = new JTable(modelzyx);
scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane, "Center");
pack();
doLayout();
}
catch(SQLException e)
{ System.out.println("Error " + e);
}
}
}

[Tolls]

So, which is line 251?
Also please use code tags.

Oh, and while you're at it can you show us the constructor?
That seems to be the root of this.

[Andri_JT]

Dear Tolls,

sorry i miss the reference line 251 by now as i have added some comment line in it.

Here is the structure of the public class:

public class ResultSetTable23 {
   public static void main(String[] args)
   {  JFrame frame = new ResultSetFrame();
.....

1st InnerClass

abstract class ResultSetTableModel extends AbstractTableModel
{  public ResultSetTableModel(ResultSet aResultSet)
   {  rstm23 = aResultSet;

2nd InnerClass

 
class ScrollingResultSetTableModel extends ResultSetTableModel 
{  public ScrollingResultSetTableModel(ResultSet aResultSet)
   {  super(aResultSet);
...

3rd InnerClass:

class CachingResultSetTableModel extends ResultSetTableModel
{  public CachingResultSetTableModel(ResultSet aResultSet)
   {  super(aResultSet);
...

4th InnerClass:

class ResultSetFrame extends JFrame
   implements ActionListener
{  public ResultSetFrame()
   {  setTitle("ResultSet");
.   .....
    }

   public void actionPerformed(ActionEvent evt)
....
///I think this is the problem:
 if (SCROLLABLE)
               modelzyx = new ScrollingResultSetTableModel(rsFrame);
  else
               modelzyx = new CachingResultSetTableModel(rsFrame);

....
public ResultSetTableModel modelzyx;
public ResultSet rsFrame;
}

Other Public Class.

public class ResultSetTableModel implements TableModel { 
    public ResultSet resultsTM;             
    public ResultSetMetaData metadataTM;    
    public int numcolsTM, numrowsTM; 


/////the constructor
public ResultSetTableModel(ResultSet aResultSet) throws SQLException {
	this.resultsTM = aResultSet;                
	metadataTM = resultsTM.getMetaData();    
             numcolsTM = metadataTM.getColumnCount();    
	resultsTM.last();                         	
             numrowsTM = resultsTM.getRow();         
}
...

TQ

[Tolls]

What is the rest of this constructor:

abstract class ResultSetTableModel extends AbstractTableModel
{  public ResultSetTableModel(ResultSet aResultSet)
   {  rstm23 = aResultSet;

?

This is what it's complaining about (I got the wrong class earlier, sorry).

[Andri_JT]

Here is the complete constructor of InnerClass of public class ResultSetTable23

abstract class ResultSetTableModel extends AbstractTableModel
involving ResultSetTableModel.
{  public ResultSetTableModel(ResultSet aResultSet)
   {  rstm23 = aResultSet;
            try
      {  rsmd23 = rstm23.getMetaData();
         ///System.out.println(rsmd);
      }
      catch(SQLException e)
      {  System.out.println("Error " + e);
      }
   }

TIA

[Tolls]

I've just noticed that you have two classes with the same name.
OK, one is an inner class, but it's still a bit confusing to read...

Anyway, your frame is still being built and you already have events being fired. It looks like you are trying to do something with one of these not-yet-built objects. Either don't attach the listeners until after you've added all the data you want, or (and this may not work) use anonymous listeners, or a different listener class, rather than having the Frame being a listener.

Personally I find extending JFrame to be a mistake anyway. You're nto extending the Frame, you're using it. But that's by the by.

[Andri_JT]

i am so confused...because sometime it works Properly...but when i do with other java...it is NOT work again.

Trying to get the error from var\cache\index.

Here is the err of "ResultSetTable.java.err"
:

ERROR:15:duplicate class\d A_JavaCode.ResultSet.ResultSetTableModel
ERROR:26:method does not override or implement a method from a supertype
ERROR:62:cannot find symbol\n  symbol\d   method getResultSet()\n  location\d class A_JavaCode.ResultSet.ScrollingResultSetTableModel
ERROR:77:cannot find symbol\n  symbol\d   method getResultSet()\n  location\d class A_JavaCode.ResultSet.ScrollingResultSetTableModel
ERROR:57:unreported exception java.sql.SQLException; must be caught or declared to be thrown
ERROR:97:cannot find symbol\n  symbol\d   method getResultSet()\n  location\d class A_JavaCode.ResultSet.CachingResultSetTableModel
ERROR:93:unreported exception java.sql.SQLException; must be caught or declared to be thrown

[Andri_JT]

Dear Tolls/All,

thank you for the feedback and response.

this case being closed due to i have not close the connection...so while other java.code try to access the same database...it is conflicted.

TIA.