Untitled

the scroll bar does not work

text_area = new JTextArea();

text_area.setPreferredSize(new Dimension(250,150));

text_area.setLineWrap(true);

scrollpane = new JScrollPane(text_area);

       

public AziendaGUI() {

 

    company = new Azienda();

 

    frame = new JFrame("Immobiliari s.p.a");

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 

    view_list = new JButton("View Property");

    view_list.setActionCommand("view_list");

    view_list.addActionListener(this);

 

    save_list = new JButton("Save List");

    save_list.setActionCommand("save_list");

    save_list.addActionListener(this);

 

    text_area = new JTextArea();

    text_area.setPreferredSize(new Dimension(250,150));

    text_area.setLineWrap(true);

    scrollpane = new JScrollPane(text_area); //Non funziona la scroll bar

 

    grid = new GridBagLayout();

    pane = new JPanel(grid);

 

    /* Set Constraints view_list button */

    grid.setConstraints(view_list, new GridBagConstraints(0,0,1,1,0.0,0.0,GridBagConstraints.WEST,GridBagConstraints.NONE,new Insets(5,5,5,5),0,0));

    pane.add(view_list);

 

    /* Set Constraints save_list button */

    grid.setConstraints(save_list,new GridBagConstraints(1,0,1,1,0.0,0.0,GridBagConstraints.EAST,GridBagConstraints.NONE,new Insets(5,5,5,5),0,0));

    pane.add(save_list);

 

    /* Set Constraint text area */

    grid.setConstraints(scrollpane, new GridBagConstraints(0,1,2,1,0.0,0.0,GridBagConstraints.CENTER,GridBagConstraints.NONE,new Insets(5,5,5,5),0,0));

    pane.add(scrollpane);

 

    frame.setLayout(new FlowLayout());

    frame.add(pane);

 

    frame.pack();

    frame.setVisible(true);

}