String s = enter.getText();
                disp.setText("The Enetered Text is :"+ s);
                    try {
                        Class.forName("org.apache.derby.jdbc.ClientDriver");
                    } catch (ClassNotFoundException ex) {
                        Logger.getLogger(TestappView.class.getName()).log(Level.SEVERE, null, ex);
                    }
                    Connection con;
                    con = DriverManager.getConnection("jdbc:derby://localhost:1527/Mydb","root"," ");
                    Statement st = con.createStatement();
                    st.executeUpdate("create table samp(text varchar)" );
                    st.executeUpdate("insert into samp values(s)");
                    st.close();
                    
                    con.close();

Please provide more information - 

1. What is the nature of the project you are using this?
2. What exactly happend? You did not provide the error!
3. What did you expect?

Just a guess: Did you add derby/javadb library as a dependency to your project?

Please reopen this bug, when you provide more information.