Working with ArrayList and classes

Question

Hi:
I'm trying to create a program that adds and remove information to an ArrayList. I can't figure out the errors that I'm having. See if anyone can help me.
import javax.swing.JOptionPane;
import java.io.*;
import java.util.*;
public class StudentRegistration {
    class Name
       // String first = JOptionPane.showInputDialog(null,"Enter First Name","First Name", JOptionPane.QUESTION_MESSAGE);
       // String last = JOptionPane.showInputDialog(null,"Enter Last Name","Last Name", JOptionPane.QUESTION_MESSAGE);
        String first, last;
        Name(String first, String last)
            this.first = first;
            this.last =last;                   
        String getFirstName()
            return first;           
        String getLastName()
            return last;
    class Address
        String street, city, state, zipcode;
        Address(String street, String city, String state, String zipcode)
            this.street = street;
            this.city = city;
            this.state = state;
            this.zipcode = zipcode;
        String getStreet()
            return street;
        String getCity()
            return city;
        String getState()
            return state;
        String getZipCode()
            return zipcode;
     public class Student
        String id;
        Date date;
        Address address;
        Name name;
        Student (String id, Name name, Address address)
            this.id = id;
            this.name =name;
            this.address = address;
            date = new Date();
        String getId()
            return id;
    class Admissions
        ArrayList list;
        int i;
        boolean found;
        Admissions()
            list = new ArrayList();
        void addStudent(Student s)
            list.add(s);
        Object getStudent(int i)
            return list.remove(i);
        boolean Empty()
            return list.isEmpty();
        boolean getIndex(String id)
            int i, index;
            boolean found;
            while(i < index && !found)
                Object o = list.get(i);
                if (o instanceof Student)
                    Student s = (Student) o;
                    if (s.getId().compareto(id))
                        found = true;
                    else i++ ;
           return found;
    public static void main(String[] args)
        Admissions adm = new Admissions();
        Admissions drop = new Admissions();
        boolean cont;
        while(cont = true)
              String input = JOptionPane.showInputDialog(null, "Enter Selection Number:\n\n 1 - Add Student\n 2 - Remove Student\n 3 - Print List\n 4 - Quit\n" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
              int selection = Integer.parseInt(input);
                switch (selection)
                case 1:{
                    String first = JOptionPane.showInputDialog(null, "First Name:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String last = JOptionPane.showInputDialog(null, "Last Name:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Name name = new Name(first, last);
                    String street = JOptionPane.showInputDialog(null, "Street Address:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String city = JOptionPane.showInputDialog(null, "City:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String state = JOptionPane.showInputDialog(null, "State:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String zipcode = JOptionPane.showInputDialog(null, "Zip Code:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Address address = new Address(street, city, state, zipcode);
                    String id = JOptionPane.showInputDialog(null, "Student ID:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Student s = new Student(name, address, id);
                    adm.addToList(s);
                case 2:{
                    if(!adm.Empty());
                        String id = JOptionPane.showInputDialog(null, "Student ID:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                        if(adm.getIndex(id))
                            index = adm.index();
                            drop.addToList(adm.getStudent(index));
                case 3:{
           case 4: break;
           default: JOptionPane.showMessageDialog(null,"Wrong selection.");
        System.exit(0);
    

Answer 1

yes i did but it didn't changed anything..... but I fixed them by making the classes static. Logically is ok but I 'm not sure really if it 's ok. Now I have only one error two times here is the code again and the output...
import javax.swing.JOptionPane;
import java.io.*;
import java.util.*;
public class StudentRegistration {
    public static class Name
        String first, last;
        Name(String first, String last)
            this.first = first;
            this.last =last;                   
        String getFirstName()
            return first;           
        String getLastName()
            return last;
    public static class Address
        String street, city, state, zipcode;
        Address(String street, String city, String state, String zipcode)
            this.street = street;
            this.city = city;
            this.state = state;
            this.zipcode = zipcode;
        String getStreet()
            return street;
        String getCity()
            return city;
        String getState()
            return state;
        String getZipCode()
            return zipcode;
     public static class Student
        String id;
        Date date;
        Address address;
        Name name;
        Student (String id, Name name, Address address)
            this.id = id;
            this.name =name;
            this.address = address;
            date = new Date();
        String getId()
            return id;
    public static class Admissions
        ArrayList list;
        int i, index, lastindex = list.size();
        boolean found;
        Admissions()
            list = new ArrayList();
        void addStudent(Student s)
            list.add(s);
        Object getStudent(int i)
            return list.remove(i);
        boolean Empty()
            return list.isEmpty();
        boolean getFound(String id)
            while(i < lastindex && !found)
                Object o = list.get(i);
                if (o instanceof Student)
                    Student s = (Student) o;
                    if (s.getId().compareTo(id) == 0)
                        found = true;
                    else i++ ;
           return found;
        int getIndex(String id)
            while(i < lastindex && !found)
               Object index = list.get(i);
                if (index instanceof Student)
                    Student s = (Student) index;
                    if (s.getId().compareTo(id) == 0)
                        found = true;
                    else i++ ;
             return index;          
    public static void main(String[] args)
        Admissions adm = new Admissions();
        Admissions drop = new Admissions();
        boolean cont;
        while(cont = true)
              String input = JOptionPane.showInputDialog(null, "Enter Selection Number:\n\n 1 - Add Student\n 2 - Remove Student\n 3 - Print List\n 4 - Quit\n" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
              int selection = Integer.parseInt(input);
                switch (selection)
                case 1:{
                    String first = JOptionPane.showInputDialog(null, "First Name:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String last = JOptionPane.showInputDialog(null, "Last Name:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Name name = new Name(first, last);
                    String street = JOptionPane.showInputDialog(null, "Street Address:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String city = JOptionPane.showInputDialog(null, "City:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String state = JOptionPane.showInputDialog(null, "State:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    String zipcode = JOptionPane.showInputDialog(null, "Zip Code:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Address address = new Address(street, city, state, zipcode);
                    String id = JOptionPane.showInputDialog(null, "Student ID:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                    Student s = new Student(id, name, address);
                    adm.addToList(s);     //The error is here. It says that can't find add.ToList
                case 2:{
                    if(!adm.Empty());
                        String id = JOptionPane.showInputDialog(null, "Student ID:" ,"Sutdents Services", JOptionPane.QUESTION_MESSAGE);
                        if(adm.getFound(id))
                           int index = adm.getIndex(id);
                           drop.addTolist(adm.getStudent(index));  //And also here. Same error
                case 3:{
           case 4: break;
           default: JOptionPane.showMessageDialog(null,"Wrong selection.");
        System.exit(0);
}This is in the output window:
init:
deps-jar:
Compiling 1 source file to C:\Java\StudentRegistration\build\classes
C:\Java\StudentRegistration\src\StudentRegistration.java:184: cannot find symbol
symbol : method addTolist(StudentRegistration.Student)
location: class StudentRegistration.Admissions
adm.addTolist(s);
C:\Java\StudentRegistration\src\StudentRegistration.java:195: cannot find symbol
symbol : method addTolist(java.lang.Object)
location: class StudentRegistration.Admissions
drop.addTolist(adm.getStudent(index));
Note: C:\Java\StudentRegistration\src\StudentRegistration.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
2 errors
BUILD FAILED (total time: 0 seconds)