Header in ScrollPane

[Kelvin Terk]

Using JScrollPane to display JTable rows & column header.
On scrolling horizontally the row contents are showing up but the header
portion is truncated for those columns (which came in view by scrolling).
Here is my code :

  
private JScrollPane gettestSP() {
JScrollPane testSP = new javax.swing.JScrollPane();         testSP.setName("MySP");
testSP.setHorizontalScrollBarPolicy               (javax.swing.JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
testSP.setFont(new java.awt.Font("sansserif", 1, 12));
testSP.setBounds(5,20,1090,225); 
                // sizing scrollpane to width = 1090
testSP.setViewportView(gettestTP()); 
           return testSP;
}

private JTable gettestTP() {
JTable testTP = new javax.swing.JTable();
testTP.setName("MyTP");
testSP.setColumnHeaderView(testTP.getTableHeader());         testSP.getViewport().setBackingStoreEnabled(true);
testTP.setAutoResizeMode(0);
testTP.setBackground(java.awt.Color.white);
testTP.setAutoCreateColumnsFromModel(false);
testTP.setPreferredSize(new java.awt.Dimension(2200, 200));
testTP.setFont(new java.awt.Font("sansserif", 1, 12));
testTP.setBounds(0, 0, 2200, 220); 
}

Help needed.
Thanks.