At the moment Im developing a java application but Im having a problem.
Im using a JFrame that takes different JPanels, I mean i change its ContentPane for another JPanel everytime i want to show new information.

Im using a database too, im reading data from it im writing them in a JTable, But... when i try to do this my program freeze and stop working until i minimize and maximize my JFrame.!!

I need help with this.!!

What should i do?, Should i add some Threads??

This is part of the code im using:

// Class Search
table = bd.getPreparedJTable(sentencia);

public JTable getPreparedJTable(String sentencia)
	{
		JTable table = null;
		
		try
		{
			startConnection();
			prepararStatement();
	
			Vector columnNames = new Vector();
			Vector data = new Vector();
 
			    setResultSet(getStatement().executeQuery(sentencia));
             ResultSetMetaData md = getResultSet().getMetaData();
            int columns = md.getColumnCount();
 
            //  Get column names
 
            for (int i = 1; i <= columns; i++)
            {
                columnNames.addElement( md.getColumnName(i) );
            }
 
            //  Get row data
 
            while (getResultSet().next())
            {
                Vector row = new Vector(columns);
 
                for (int i = 1; i <= columns; i++)
                {
                    row.addElement( getResultSet().getObject(i) );
                }
 
                data.addElement( row );
            }
 
            getResultSet().close();
			getStatement().close();
			closeConnection();

 
        //  Create table with database data
 
        table = new JTable(data, columnNames)
		{
			public boolean isCellEditable(int row, int col){
							return false;
						
						}
		
		};
		
		}
		catch(SQLException e)
		{
			e.printStackTrace();
		}
		
		return table;
	}

// And this is how i change the background of my JFrame


void setPanel(final JPanel screen)
	{
		try{
			SwingUtilities.invokeLater( new Runnable(){
				
				public void run()
				{
					getContentPane().removeAll();
					setContentPane(screen);
				}
			});
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		SwingUtilities.updateComponentTreeUI(this);
	}

Any help would be appreciated!

Try adding a revalidate() and possibly a repaint() in your runnable after you set the new screen.

Try adding a revalidate() and possibly a repaint() in your runnable after you set the new screen.

Thanks Ezzaral for the help, I added a SwingWorker that reads the data from the database and when it finish looking for the data, it revalidate the JTable and repaint the JFrame.!!