JTable disturbs gridbaglayout with jtextfields

Question

Hello, my problem is a JTable, that shrinks my two JTextFields to zero length. I tried to create the gui without the JTable and it works as expected. There should be two JTextFields with fixed length in a row below the JTable in a JTabbedPane. Code:
    jT1 = new JTable( 10,10);
    jSP1 = new JScrollPane( jT1);// without jT1 everything is fine
    jP1 = new JPanel( new BorderLayout());
    jP1.add( jSP1, BorderLayout.CENTER);
    jTP = new JTabbedPane();
    jTP.add( "Tab1", jP1);
    jL1 = new JLabel( "Txt1:");
    jTF1 = new JTextField( "0.00",10);
    jL2 = new JLabel( "Txt2:");
    jTF2 = new JTextField( "0.00",10);
    jP0 = new JPanel(new GridBagLayout());
    jP0.add(jTP, new GridBagConstraints(0, 0, 4, 1, 1.0, 1.0
        ,GridBagConstraints.WEST, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
    jP0.add(jL1, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0
        ,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 0, 0, 0), 0, 0));
    jP0.add(jTF1, new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0
        ,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 10, 0, 0), 0, 0));
    jP0.add(jL2, new GridBagConstraints(2, 1, 1, 1, 0.0, 0.0
        ,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 20, 0, 0), 0, 0));
    jP0.add(jTF2, new GridBagConstraints(3, 1, 1, 1, 0.0, 0.0
        ,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(5, 10, 0, 0), 0, 0));Setting weightx to 0.5 and GriBagConstraints.HORIZONTAL for the JTextFields makes them variable size, but that' not what I want.

Answer 1

What about setting iPadx parameter in GridBagConstraints?
regards,
Stas