# 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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    // components/textarea/TextAreaDemo.java
    // Purpose: Illustrate JTextArea, JScrollPane, BorderFactory, ...
    // Author: Fred Swartz
    // Date  : 2000-04-26, ... 2004-11-03

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

    public class TextAreaDemo extends JFrame {
        //============================================== instance variables
        JTextArea m_resultArea = new JTextArea(6, 30);

        //====================================================== constructor
        public TextAreaDemo() {
            //... Set initial text, scrolling, and border.
            m_resultArea.setText("Enter more text to see scrollbars");
            JScrollPane scrollingArea = new JScrollPane(m_resultArea);
            scrollingArea.setBorder(BorderFactory.createEmptyBorder(10,5,10,5));

            // Get the content pane, set layout, add to center
            Container content = this.getContentPane();
            content.setLayout(new BorderLayout());
            content.add(scrollingArea, BorderLayout.CENTER);
            this.pack();
        }

        //============================================================= main
        public static void main(String[] args) {
            JFrame win = new TextAreaDemo();
            win.setTitle("TextAreaDemo");
            win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            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. |