I'm trying to make a phone directory where the user has to enter multiple inputs using JTextField. I also have a search option that will search the inputted name from the directory in filewriter and I just can't seem to store my inputs in the filewriter. This is my initial code

public static void main(String[] args) throws Exception {
    Scanner scan = new Scanner(System.in);
    int menu = 0;
    
    boolean quit = false;
    do{
    String input = JOptionPane.showInputDialog(null,"Telephone Directory Management System"
              "\n1. Add a Student"
              "\n2. Search"
              "\n3. Sort Data"
              "\n4. List of all data"
              "\n5. Exit"
              "\n\nPlease enter your choice:","Main Menu",JOptionPane.QUESTION_MESSAGE);

    menu = Integer.parseInt(input);
        
        switch (menu) {
            case 1:
                JTextField student = new JTextField();
                JTextField name = new JTextField();
                JTextField address = new JTextField();
                JTextField phone = new JTextField();
                
                Object[] fields = {
                    "Enter Student ID:",student,
                    "Enter Name:",name,
                    "Enter Address:",address,
                    "Enter Phone No.:",phone};
                int add = JOptionPane.showConfirmDialog(null,fields,"Add a Student",JOptionPane.OK_CANCEL_OPTION);

                if (add == JOptionPane.OK_OPTION)
                {

                    String student1 = student.getText();
                    String name1 = name.getText();
                    String address1 = address.getText();
                    String phone1 = phone.getText();
                    
                    FileWriter fw = new FileWriter(new File("directory.txt"), true);
                    BufferedWriter out = new BufferedWriter(fw);
                    out.write(student1   " "   name1   " "   address1   " "   phone1);
                    out.newLine();
                }
                break;
            case 2:
                input = JOptionPane.showInputDialog(null,"Enter name to search information:","Search",JOptionPane.OK_CANCEL_OPTION);
                File f = new File("directory.txt");
                try {
                    BufferedReader freader = new BufferedReader(new FileReader(f));
                    String s;
                    while ((s = freader.readLine()) != null) {
                        String[] st = s.split(" ");
                        String id = st[0];
                        String nm = st[1];
                        String add1 = st[2];
                        String phoneNo = st[3];
                        if (input.equals(nm)) {
                            JOptionPane.showMessageDialog(null,"Student ID: " id "\nName: " nm "\nAddress: " add1 "\nPhone No.: " phoneNo "","Information",JOptionPane.QUESTION_MESSAGE);
                        }
                    }
                    freader.close();
                } catch (Exception e) {
                }

                break;

I tried using scanner before and it does store my inputs but I need to use JOptionPane in this one. Thank you so much to anyone that can help me in this.

CodePudding user response：

You should close the BufferedWriter after writing into it, like this

out.close()

If you don't do this the BufferedWriter won't flush what you've written into it to the underlying stream.