TextEditFrame.java Source code

Introduction

Here is the source code for TextEditFrame.java

Source

import java.awt.Container;
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.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class TextEditFrame extends JFrame {

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

    private JScrollPane scrollPane = new JScrollPane(textArea);

    private JTextField fromField = new JTextField(8);

    private JTextField toField = new JTextField(8);

    public TextEditFrame() {
        setTitle("TextEditTest");
        setSize(500, 300);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        Container contentPane = getContentPane();

        JPanel panel = new JPanel();

        JButton replaceButton = new JButton("Replace");
        panel.add(replaceButton);
        replaceButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                String from = fromField.getText();
                int start = textArea.getText().indexOf(from);
                if (start >= 0 && from.length() > 0)
                    textArea.replaceRange(toField.getText(), start, start + from.length());
            }
        });

        panel.add(fromField);

        panel.add(new JLabel("with"));

        panel.add(toField);

        contentPane.add(panel, "South");
        contentPane.add(scrollPane, "Center");
    }

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