# Java: Example - JTextArea

| This is how the window looks initially. There are no scrollbars visible. They will be added only if there is sufficient data in the JTextArea to make them necessary.

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    // File   : GUI/components/textarea/TextAreaDemoB.java
    // Purpose: Illustrate JTextArea contained in JScrollPane
    //          where scroll bars appear as needed.
    // Author : Fred Swartz, 2006-07-27

    import java.awt.*;
    import javax.swing.*;

    public class TextAreaDemoB extends JFrame {
        //============================================== instance variables
       JTextArea _resultArea = new JTextArea(6, 20);

        //====================================================== constructor
        public TextAreaDemoB() {
            //... Set textarea's initial text, scrolling, and border.
            _resultArea.setText("Enter more text to see scrollbars");
            JScrollPane scrollingArea = new JScrollPane(_resultArea);

            //... Get the content pane, set layout, add to center
            JPanel content = new JPanel();
            content.setLayout(new BorderLayout());
            content.add(scrollingArea, BorderLayout.CENTER);

            //... Set window characteristics.
            this.setContentPane(content);
            this.setTitle("TextAreaDemo B");
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            this.pack();
        }

        //============================================================= main
        public static void main(String[] args) {
            JFrame win = new TextAreaDemoB();
            win.setVisible(true);
        }
    }

This is how the window looks after typing in a long line of text. A horizontal scrollbar is necessary. It's a bit of a puzzle to me why the vertical scrollbar also appears because it's not needed. If you stretch the window to make it a little higher, the vertical scrollbar then disappears. |