JDBC connects to SQLite database but SQLite.Exception:no such table

I am using SQLite for my database. I downloaded SQLite Manager and used this to create my database and tables. I then use the following code to connect to the database. The program connects to the database but when I try to exeute a SQL query I get this error: "java.sql.SQLException: SQLite.Exception: no such table: test"

//database connecting class
public class DBConnect {
Connection conn=null;

  public static Connection connecrDb(){
      try{
      Class.forName("org.sqlite.JDBC");
      Connection conn = DriverManager.getConnection("jdbc:sqlite:DataBaseU.sqlite");
          System.out.println("connection success");
      return conn;
      }
      catch(Exception e){
          JOptionPane.showMessageDialog(null, e);
          return null;
      }
  }

}

code for main Form

Connection conn = null;
Statement stmt = null;
ResultSet rs =null;
PreparedStatement pst = null;
public MainForm() {
    initComponents();
    conn = DBConnect.connecrDb();

}

code for insert query in button

private void add_item_groupActionPerformed(java.awt.event.ActionEvent evt) { 
try{
          String sql ="insert into test(t) values(?)";
          pst = conn.prepareStatement(sql);
          pst.setString(1, txt_itemgp.getText());

          pst.execute();
          JOptionPane.showMessageDialog(null, "Saved ");
       }
       catch(Exception e){
           JOptionPane.showMessageDialog(null, e);
       }
       }