ti posto questa parte qua.
dovrebbe bastare:
codice:
jLabel9.setText("Note");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 5;
        gridBagConstraints.gridwidth = 3;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(14, 12, 0, 0);
        add(jLabel9, gridBagConstraints);

        jScrollPane2.setPreferredSize(new java.awt.Dimension(300, 100));

        areaNote.setColumns(20);
        areaNote.setRows(5);
        areaNote.setPreferredSize(new java.awt.Dimension(100, 30));
        jScrollPane2.setViewportView(areaNote);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 4;
        gridBagConstraints.gridy = 5;
        gridBagConstraints.gridwidth = 8;
        gridBagConstraints.gridheight = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(14, 12, 0, 0);
        add(jScrollPane2, gridBagConstraints);

        btnAddBook.setText("Add Book");
        btnAddBook.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnAddBookActionPerformed(evt);
            }
        });
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 7;
        gridBagConstraints.gridwidth = 3;
        gridBagConstraints.gridheight = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(14, 12, 0, 0);
        add(btnAddBook, gridBagConstraints);

        textIsbn.setPreferredSize(new java.awt.Dimension(200, 15));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 4;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.gridwidth = 3;
        gridBagConstraints.gridheight = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(14, 12, 0, 0);
        add(textIsbn, gridBagConstraints);