Question

There is a problem with my JTextArea. When I write, it goes down the frame and I don’t know how to limit it so no more lines below the JFrame

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Answer 1

After much research I have found a solution! I’ve discovered that making a JTextArea scrollable is based on the design of the program. This link is what helped me to get my JTextPane to work and is what I will be using as a reference. This is not the only way to do this, but if you have any questions, don’t hesitate to ask! Thanks.

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As stated by others, you need to wrap your JTextArea in JScrollPane

public class ScrollableJTextArea
{
    JTextArea jTextArea     = new JTextArea();

    // Wrap JTextArea in a JScrollPane
    JScrollPane jScrollPane = new JScrollPane(jTextArea);
    ...

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Define a constructor for your GUI

ScrollableJTextArea()
{
    jTextArea.setLineWrap(true); // wrap text horizontally
    jScrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    jScrollPane.setPreferredSize(new Dimension(380,350));
    // and so on...
}

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And your main method

public static void main(String[] args)
{
    ScrollableJTextArea sjta = new ScrollableJTextArea();
    JFrame frame             = new JFrame();
    JPanel center            = new JPanel();

    // I've read on many forums as well as heard from many fellow classmates 
    // that it's better to add content to a panel rather than the frame itself
    frame.add(center, BorderLayout.CENTER);
    center.add(sjta.jScrollPane);

    frame.setSize(400, 400);
    frame.setVisible(true);
}

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