When click “Save to File” button, then write the records from ArrayList to file product.txt, at the same time display "file write success" in JTextArea on the GUI

Sure, I can help you with that! Here is the code snippet that you can use to achieve this functionality:

import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

import javax.swing.JTextArea;

public class WriteToFile {
    public static void writeToFile(ArrayList<String> records, JTextArea textArea) {
        try {
            FileWriter writer = new FileWriter("product.txt");
            for (String record : records) {
                writer.write(record + "\n");
            }
            writer.close();
            textArea.setText("File write success");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

This code defines a static method `writeToFile` that takes an `ArrayList` of `String` objects and a `JTextArea` as input parameters. It then creates a `FileWriter` object to write the records to the file "product.txt" and displays "File write success" in the `JTextArea`.

To use this method, you can simply call it when the "Save to File" button is clicked, and pass in the `ArrayList` of records and the `JTextArea` object. For example:

saveToFileButton.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        WriteToFile.writeToFile(records, textArea);
    }
});

I hope this helps! Let me know if you have any further questions.