Thread: Urgent help needed regarding JTable display

hi,

I am very new to forums and I am very new to swings.I had devloped a JFRame which contains Jtabbedpane.In the first tab of the jtabbedpane i had placed a JTable.my problem is the jtable is displaying well when jframe is not maximized.but when i maximized the frame using maximize button and if i try to scroll the jtable it is not displaying well.i am not understanding why this distrortion is happening.I searched in all forums about this but i didnt get any solution.
Plz help me about this i am stuggling for past two weeks.Plz ignore mistakes in my english.[LIST]


Here is my complete code of my class

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
class Testdemo
		extends 	JFrame
{
	private		JTabbedPane tabbedPane;
	private		JPanel		panel1;
	private		JPanel		panel2;
	private		JPanel		panel3;
JTable mappingTable;
JScrollPane pane;
 
	public Testdemo()
	{
		// NOTE: to reduce the amount of code in this example, it uses
		// panels with a NULL layout.  This is NOT suitable for
		// production code since it may not display correctly for
		// a look-and-feel.
 
		setTitle( "Tabbed Pane Application" );
		setSize( 300, 200 );
		setBackground( Color.gray );
 
		JPanel topPanel = new JPanel();
		topPanel.setLayout( new BorderLayout() );
		getContentPane().add( topPanel );
 
		// Create the tab pages
		createPage1();
		createPage2();
		createPage3();
 
		// Create a tabbed pane
		tabbedPane = new JTabbedPane();
		tabbedPane.addTab( "Page 1", panel1 );
		tabbedPane.addTab( "Page 2", panel2 );
		tabbedPane.addTab( "Page 3", panel3 );
		topPanel.add( tabbedPane, BorderLayout.CENTER );
	}
 
	public void createPage1()
	{
		panel1 = new JPanel();
		panel1.setLayout( new BorderLayout() );
 
		Object values[] = { "SNo","Source system", "Source Table","Source field Name","Data Type","Field Length","NaturalIdentifier","Target System","Target Table","Field Name","Data Type","Length","Primary Key","Field Description","Data Mapping Rule","Transformation Rules","ETL Load rules(one per table)","Comment","Status" };
		 TableModel model = new DefaultTableModel(values, 1010){
				public boolean isCellEditable(int row,int column)
					{
 
					if(column==0||column==5||column==11)
					return false;
					return true;
					}
				};
			 mappingTable = new javax.swing.JTable (1010,19) {
					 public Component prepareRenderer(TableCellRenderer renderer, int row, int column){
					        Component returnComp = super.prepareRenderer(renderer, row, column);
					        Color alternateColor = new Color(252,242,206);
					        Color whiteColor = Color.WHITE;
					        if (!returnComp.getBackground().equals(getSelectionBackground())){
					            Color bg = (row % 2 == 0 ? alternateColor : whiteColor);
					            returnComp .setBackground(bg);
					            bg = null;
					        }
					        return returnComp;
					 }
 
					public boolean isCellEditable(int row,int column)
					{
						for(int i=0;i<mappingTable.getRowCount();i++)
						{
							for(int j=0;j<mappingTable.getColumnCount();j++)
							{
								if(mappingTable.getValueAt(i,j)!=null&&mappingTable.getValueAt(i,j).toString().length()>=1)
								{
									for(int k=0;k<=i;k++)
									{
										mappingTable.setValueAt((k+1), k, 0);
 
									}
								}
							}
						}
						if(column==0)
							return false;
							return true;
					}
 
 
				    };
				   mappingTable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
				   pane = new JScrollPane(mappingTable);
 
				   JLabel l=new JLabel("KKKKK");
				   panel1.add(pane,BorderLayout.CENTER);
	}
 
	public void createPage2()
	{
		panel2 = new JPanel();
		panel2.setLayout( new BorderLayout() );
 
		panel2.add( new JButton( "North" ), BorderLayout.NORTH );
		panel2.add( new JButton( "South" ), BorderLayout.SOUTH );
		panel2.add( new JButton( "East" ), BorderLayout.EAST );
		panel2.add( new JButton( "West" ), BorderLayout.WEST );
		panel2.add( new JButton( "Center" ), BorderLayout.CENTER );
	}
 
	public void createPage3()
	{
		panel3 = new JPanel();
		panel3.setLayout( new GridLayout( 3, 2 ) );
 
		panel3.add( new JLabel( "Field 1:" ) );
		panel3.add( new TextArea() );
		panel3.add( new JLabel( "Field 2:" ) );
		panel3.add( new TextArea() );
		panel3.add( new JLabel( "Field 3:" ) );
		panel3.add( new TextArea() );
	}
 
    // Main method to get things started
	public static void main( String args[] )
	{
		// Create an instance of the test application
		Testdemo mainFrame	= new Testdemo();
		mainFrame.setVisible( true );
	}
}