JTextArea中的ScrollPane

Question

This is part of GUI project I'm working with and I'm trying to make JScrollPane to appear in the JTextArea when the text is longer than the size of the JTextArea . It looks fine to me but the JScrollPane still doesn't show up.

    JTextArea textArea = new JTextArea();
    textArea.setLineWrap(true);
    textArea.setWrapStyleWord(true);
    textArea.setBounds(77, 27, 561, 146);
    JScrollPane scrollPane = new JScrollPane(textArea);
    scrollPane.setPreferredSize(new Dimension(380, 100));
    scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    JPanel panel= new JPanel()
    panel.add(textArea);

Can anyone verify this peace of code?

Answer 1

The reason your JScrollPane isn't showing up is because you haven't added it to your GUI...

 panel.add(textArea);

should be

 panel.add(scrollPane);

Why one might ask?
Because in this line: JScrollPane scrollPane = new JScrollPane(textArea); we see that the JScrollPane's constructor takes in the JTextArea/etc thus removing any need to add the textArea to the GUI because the textArea is now part of the scrollPane which, in turn, should be added to the GUI.