try{
    Class.forName("java.sql.Driver");
    conn=DriverManager.getConnection("jdbc:mysql://localhost/bellissimo","root"," ");
    int k =JOptionPane.showConfirmDialog(null,"Do you wish to add a new record?");
    if(k==JOptionPane.YES_OPTION){
        st=conn.createStatement();
    String query="Update details set customerid="+idTF.getText()+"customername="+nameTF.getText()+"phoneno="+phnTF.getText()+"address="+adrsTF.getText()+"'where customerid="+idTF.getText()+";";
    st.executeUpdate(query);
    JOptionPane.showMessageDialog(null,"Record Updated");
}
catch(Exception x){
    JOptionPane.showMessageDialog(null,x.getMessage());}
}