TextAreaFrame.java Source code

Introduction

Here is the source code for TextAreaFrame.java

Source

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class TextAreaFrame extends JFrame implements ActionListener {

    private JButton insertButton = new JButton("Insert");

    private JButton wrapButton = new JButton("Wrap");

    private JButton noWrapButton = new JButton("No wrap");

    private JTextArea textArea = new JTextArea(8, 40);

    private JScrollPane scrollPane = new JScrollPane(textArea);

    public TextAreaFrame() {
        JPanel p = new JPanel();

        p.add(insertButton);
        insertButton.addActionListener(this);

        p.add(wrapButton);
        wrapButton.addActionListener(this);

        p.add(noWrapButton);
        noWrapButton.addActionListener(this);

        getContentPane().add(p, "South");

        getContentPane().add(scrollPane, "Center");

        setTitle("TextAreaTest");
        setSize(300, 300);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }

    public void actionPerformed(ActionEvent evt) {
        Object source = evt.getSource();
        if (source == insertButton)
            textArea.append(
                    "The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.");
        else if (source == wrapButton) {
            textArea.setLineWrap(true);
            scrollPane.validate();
        } else if (source == noWrapButton) {
            textArea.setLineWrap(false);
            scrollPane.validate();
        }
    }

    public static void main(String[] args) {
        JFrame f = new TextAreaFrame();
        f.show();
    }

}