correct the sql error and retrive data....plez

i am getting a SQL Error while retriving data from access to jframe called "datatype mismatch in criteria expression" plez do help me and studentId's datatye is number......

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
     if(jTextField1.getText().equals(""))
 {
     JOptionPane.showMessageDialog(null,"Please enter the Student ID to Search","Error",0);
 }
 else
 {
     try
     {
         String ID=jTextField1.getText();


         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
         Connection con=DriverManager.getConnection("jdbc:odbc:college");
         Statement st=con.createStatement();
            ResultSet rs=st.executeQuery("select * from STUDENT where studentid='"+ID+"'");

            while(rs.next()){
            jTextField1.setText(rs.getString("studentid"));
            jTextField2.setText(rs.getString("name"));
            jComboBox1.setSelectedItem(rs.getString("course"));
            jComboBox2.setSelectedItem(rs.getString("sem"));
            jTextField4.setText(rs.getString("father"));
            jTextField5.setText(rs.getString("mother"));
            jTextField13.setText(rs.getString("dob"));
            jTextField6.setText(rs.getString("contactno"));
            jTextField7.setText(rs.getString("nationality"));
            jTextField8.setText(rs.getString("religion"));
            jTextField9.setText(rs.getString("caste"));
            jTextArea1.setText(rs.getString("address"));
            jTextField10.setText(rs.getString("foccupation"));
            jTextField11.setText(rs.getString("moccupation"));
           jTextField12.setText(rs.getString("income")); 

            }
            JOptionPane.showMessageDialog(null,"Searched Successfully");
            rs.close();
            st.close();
            con.close();
     }
    catch(SQLException sqlex)
     {
        JOptionPane.showMessageDialog(null,"SQLExceptionOccurred"+sqlex.getMessage());
     }
     catch(ClassNotFoundException cnfex)
     {
         JOptionPane.showMessageDialog(null,"ClassNotFoundExceptionOccurred"+cnfex.getMessage());
     }
 }

}

plez plez plez help me its my assignment....... and thanks for all your help.....