public NewJFrame() {
    initComponents();
    try
    {
        Class.forName("java.sql.Driver");
      con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","admin");
    }

catch(Exception e)
{
    e.printStackTrace();
}

}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

txtname .setText(""); 
txtfrom.setText("");
txtgen.setText("");
txtto .setText("");
txttname .setText("");
txtadd.setText("");
txtphone.setText("");
txttrno.setText("");

} 
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { 
    {
        try
        {
          st=con.createStatement();
            int a=Integer.parseInt(txttrno.getText());
            String b=txttname.getText();
            String c=txtfrom.getText();
            String d=txtto.getText();
            String k=txtname.getText();
            String f=txtgen.getText();
            String g=txtadd.getText();
            int h=Integer.parseInt(txtphone.getText());
           rs=st.executeUpdate("insert into railway values("+a+",'"+b+"','"+c+"','"+d+"','"+e+"','"+f+"','"+g+"',"+h+")");
        }

actually m making programmes with tools lik button,textfield etc.. and ds line "private void jButton2ActionPerformed" automatically comes in the programme when i double click d second button which i,ve added in ma frame.... plzz smone help me to remove error frm above code....