java.sql.SQLException: Exhausted Resultset

Question

add = new JButton("Add",new ImageIcon("D:/Android/Assignment/Images/bookAdd.png")); 
      add.setToolTipText("Click Add to Store in Database"); // for toast 
    add.setBackground(new Color(233,214,199)); 
    add.setForeground(new Color(207,108,40)); 
    add.setFont(b); 
      add.addActionListener(new ActionListener() 
      { 

       @Override 
       public void actionPerformed(ActionEvent ae) 
       { 

       String subject=tf2.getText(); 
       String title=tf3.getText(); 
       String author=tf4.getText(); 
            int total_books=Integer.parseInt(tf5.getText()); 


        try 
      { 
            DriverManager.registerDriver(new oracle.jdbc.OracleDriver());     

       Class.forName("oracle.jdbc.driver.OracleDriver"); 

       Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","oracle"); 
            System.out.println("11"); 
            String sql="SELECT * from ADD_BOOKS WHERE (SUBJECT=?) AND (BOOK_TITLE=?)AND (BOOK_AUTHOR=?)"; 
           // String sql="SELECT * from ADD_BOOKS VALUES(?,?,?)"; 

            PreparedStatement pst=con.prepareStatement(sql); 
            // Statement stmt = con.createStatement(); 
             System.out.println("12"); 
            pst.setString(1, subject); 
            System.out.println("13"); 
            pst.setString(2, title); 
            System.out.println("14"); 
            pst.setString(3, author); 
            System.out.println("15"); 
            ResultSet rs=pst.executeQuery(); 
            System.out.println("16"); 
           // if (rs! = null) 
            // { 

            while(rs.next()) 
             System.out.println("17"); 
            { 

             System.out.println("18"); 

             String subjj=rs.getString(1); 
             String titlee=rs.getString(2); 
             String authorr=rs.getString(3); 
            int totalBooks=Integer.parseInt(rs.getString(4)); 

            System.out.println("19"); 
            if((subject.equals(subjj)) && (title.equals(titlee)) && (author.equals(authorr))) 
            { 
             System.out.println("20"); 
             totalBooks=totalBooks+total_books; 


             String updateTableSQL = "UPDATE ADD_BOOKS SET TOTAL_BOOKS = TOTAL_BOOKS+totalBooks"; 
          // + " WHERE SUBJECT = ?"; 
            PreparedStatement pstup=con.prepareStatement(updateTableSQL);    
          // pstup=con.prepareStatement(updateTableSQL); 
            pstup.setInt(4, totalBooks); 
            pstup.executeUpdate(); 

             JOptionPane.showMessageDialog(null,"Successfully Updated"); 

               } 
             else 
             { 
             try 
             { 


              DriverManager.registerDriver(new oracle.jdbc.OracleDriver()); 


       Class.forName("oracle.jdbc.driver.OracleDriver"); 

       Connection con1=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","oracle"); 

            PreparedStatement prep1 = con1.prepareStatement("INSERT INTO ADD_BOOKS VALUES(?,?, ?, ?)"); 

            prep1.setString(1, subject); 

            prep1.setString(2, title); 

            prep1.setString(3,author); 
            prep1.setInt(4,total_books); 

            prep1.executeUpdate(); 



            String nextRowId = Integer.toString(dm.getRowCount()); 
            dm.addRow(new Object[] { 
             nextRowId, 

              tf2.getText(), 
              tf3.getText(), 
              tf4.getText(), 
              tf5.getText() 
            }); 

             tf2.setText(""); 
             tf3.setText(""); 
             tf4.setText(""); 
             tf5.setText(""); 
            System.out.println("Data Stored Into JTable Successfully"); 

            JOptionPane.showMessageDialog(null, "Data is successfully inserted into database"); 
            } 
             catch(Exception e) 
        { 
         System.out.println(e.getMessage()); 
        JOptionPane.showMessageDialog(null, "error in submitting data"); 
        } 
             } 
            }} 
        catch(Exception e) 
        { 
         System.out.println(e.getMessage()); 
        JOptionPane.showMessageDialog(null, "error in submitting data"); 
        } 
       }}); 

Answer 1

Предложение - всегда используйте фигурные скобки, даже если у вас есть только одна строка кода. В вашем случае вы этого не сделали, тогда вы добавили System.out, который был выполнен в цикле while, а затем вы попытались получить данные, когда они уже были получены.

Делай так:

while (rs.next()) { 
         System.out.println("17"); 

         System.out.println("18"); 
        //... 
}