Need simple sample program

Question

I need a very SIMPLE application that does the following so I can see the logic/syntax and put it in the program I am writing:
1. Has a GUI
2. has one text field with ActionListener implemented
3. computes the squares of one through ten and sends the results to a text file
4. sends results to a text file whose name is gotten from the text field
For example: I would type "asdf" (without the quoatation marks) in the text field , then press enter/return. The program would then send the results of the math operation to a text file named "asdf."

Answer 1

I may be wrong but this awfully looks like a school assignment. If not, and you may really be trying to start up with Swing, here goes:import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.File;
public class SimpleApplication extends JPanel {
     private JTextField theFileNameField;
     public SimpleApplication() {
          super(new BorderLayout());
          theFileNameField = new JTextField(20);
          theFileNameField.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    saveToFile();
          add(theFileNameField, BorderLayout.CENTER);
     private void saveToFile() {
          String text = theFileNameField.getText();
          if (text.equals("")) return;
          BufferedWriter bw = null;
          try {
               File outputFile = new File(theFileNameField.getText());
               bw = new BufferedWriter(new FileWriter(outputFile));
               for (int i = 1; i <= 10; i++) {
                    bw.write("" + (i * i));
                    bw.newLine();
               System.out.println("successfully saved to " + outputFile.getAbsolutePath());
          } catch (IOException e) {
               e.printStackTrace();
          } finally {
               if (bw != null) {
                    try {
                         bw.close();
                    } catch (IOException e) {}
     public static void main(String[] args) {
          try {
               UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
          } catch (Exception e) {
               e.printStackTrace();
          final JFrame frame = new JFrame(SimpleApplication.class.getName());
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setContentPane(new SimpleApplication());
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    frame.pack();
                    frame.show();
}