VSCode javax.swing error 'package does not exist'

import javax.swing.*; //? Error Here, 'Package javax.swing does not exist' <----- ERROR HERE
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.LinkedList;
import java.util.StringTokenizer;

public class Employment_Info {

    //? declare attributes
    String name, gender, marital_status, jobClass;
    int age, health;
    double wage;

    //* constructor with param
    public Employment_Info(String name, String gender, String marital_status, String jobClass, int age, int health, double wage) {
        this.marital_status = marital_status;
        this.age = age;
        this.gender = gender;
        this.health = health;
        this.jobClass = jobClass;
        this.name = name;
        this.wage = wage;
    }

    //? mutator

    public void setGender(String gender) {
        this.gender = gender;
    }

    public void setMarital_status(String marital_status) {
        this.marital_status = marital_status;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setHealth(int health) {
        this.health = health;
    }

    public void setJobClass(String jobClass) {
        this.jobClass = jobClass;
    }

    public void setWage(double wage) {
        this.wage = wage;
    }

    //? accessor

    public String getGender() {
        return gender;
    }

    public String getMarital_status() {
        return marital_status;
    }

    public String getJobClass() {
        return jobClass;
    }

    public double getWage() {
        return wage;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public int getHealth() {
        return health;
    }

    @Override
    public String toString() {
        return "Employment_Info{" +
                "name='" + name + '\'' +
                ", gender='" + gender + '\'' +
                ", marital_status='" + marital_status + '\'' +
                ", jobClass='" + jobClass + '\'' +
                ", age=" + age +
                ", health=" + health +
                ", wage=" + wage +
                '}';
    }

    public static void main (String[]args)
    {
        try {
            //create reader to read input file
            BufferedReader in = new BufferedReader(new FileReader("C:/Users/deena/IdeaProjects/SWC4133_Lab Exercise 1/src/employeeList.txt"));
            //create linkedlist
            LinkedList<Employment_Info> employeeList = new LinkedList<>();

            String indata = null; //represent a line of data in input file
            Employment_Info employment_info;

            //read file
            while((indata = in.readLine())!=null)
            {
                System.out.println (indata);
                StringTokenizer st = new StringTokenizer(indata, ";");
                String name = st.nextToken();
                String gender = st.nextToken();
                String marital_status = st.nextToken();
                String jobClass = st.nextToken();
                int age = Integer.parseInt(st.nextToken());
                int health = Integer.parseInt(st.nextToken());
                double wage = Double.parseDouble(st.nextToken());

                //create object
                employment_info = new Employment_Info(name, gender, marital_status,jobClass, age, health, wage);
                //add object into employeeList
                employeeList.add (employment_info);
            }
            in.close(); //close reader

            int menu = 0;
            do{
                menu = Integer.parseInt(JOptionPane.showInputDialog("Choose menu: \n 1: Add new data \n 2: Edit data \n 3: Delete data \n 4: Display data"));

                if (menu == 1)
                {
                    String name = JOptionPane.showInputDialog("Enter name");
                    String gender = JOptionPane.showInputDialog("Enter gender");
                    String marital_status = JOptionPane.showInputDialog("Enter marital status");
                    String jobClass = JOptionPane.showInputDialog("Enter job class");
                    int age = Integer.parseInt(JOptionPane.showInputDialog("Enter age"));
                    int health = Integer.parseInt(JOptionPane.showInputDialog("Enter health"));
                    double wage = Double.parseDouble(JOptionPane.showInputDialog("Enter wage"));

                    //create object
                    employment_info = new Employment_Info(name, gender, marital_status, jobClass, age, health, wage);
                    //add object into employeeList
                    employeeList.add (employment_info);
                }

                else if (menu == 2)
                {
                    //ask user which object they want to edit
                    //enter employee name
                    String name = JOptionPane.showInputDialog("Enter name");
                    //find the object
                    for (int i = 0; i<employeeList.size(); i++)
                    {
                        //get the object from employeeList
                        employment_info = employeeList.get(i); //use method to retrieve object
                        if (employment_info.getName().equalsIgnoreCase(name)) //if true
                        {
                            int choice = 0;
                            do {
                                choice = Integer.parseInt(JOptionPane.showInputDialog("Choose menu: \n 1: Edit gender \n 2: Edit Marital Status\n 3: Edit Job Class \n 4: Edit age \n 5: Edit Health \n 6: Edit Wage"));
                                if (choice == 1) //edit gender
                                {
                                    String newgender = JOptionPane.showInputDialog("Enter new gender");
                                    //update object using mutator method
                                    employment_info.setGender(newgender);
                                    //update object in employeeList
                                    employeeList.set(i, employment_info);
                                }
                                else if (choice == 2) //edit marital status
                                {
                                    String newmarital_status = JOptionPane.showInputDialog("Enter new marital status");
                                    //update object using mutator method
                                    employment_info.setMarital_status(newmarital_status);
                                    //update object in employeeList
                                    employeeList.set(i, employment_info);
                                }
                                else if (choice == 3) //edit job class
                                {
                                    String newjobClass = JOptionPane.showInputDialog("Enter new job class");
                                    employment_info.setJobClass(newjobClass);
                                    employeeList.set(i, employment_info);
                                }
                                else if (choice == 4) //edit age
                                {
                                    int newage = Integer.parseInt(JOptionPane.showInputDialog("Enter new age"));
                                    employment_info.setAge(newage);
                                    employeeList.set(i, employment_info);
                                }
                                else if (choice == 5) //edit health
                                {
                                    int newhealth = Integer.parseInt(JOptionPane.showInputDialog("Enter new health"));
                                    employment_info.setHealth(newhealth);
                                    employeeList.set(i, employment_info);
                                }
                                else if (choice == 6) //edit wage
                                {
                                    double newwage = Double.parseDouble(JOptionPane.showInputDialog("Enter new wage"));
                                    employment_info.setWage(newwage);
                                    employeeList.set(i, employment_info);
                                }
                            } while (choice !=7);
                        }
                    }
                }
                else if (menu == 3)
                {
                    //ask user which object they want to delete
                    //enter employee name
                    String name = JOptionPane.showInputDialog("Enter name");
                    //find the object
                    for (int i = 0; i<employeeList.size(); i++)
                    {
                        //get object
                        employment_info = employeeList.get(i);
                        if (employment_info.getName().equalsIgnoreCase(name))
                        {
                            employeeList.remove(i); //use method remove
                        }
                    }
                }
                else if (menu == 4)
                {
                    //display data
                    System.out.println ("List all employee in Employee List");
                    for (int i = 0; i<employeeList.size(); i++)
                    {
                        System.out.println (employeeList.get(i));
                    }
                }
            }
            while (menu != 5);
        }
        catch (Exception ex)
        {
            System.out.println (ex.getMessage());
        }
    }
}