JAVA- Student Management

/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class Add extends AbstractAction
{
    private JDialog     dialog;
    private JFrame      frame;

    public Add(String commandAction,JFrame frame)
    {
        super(commandAction);
        this.frame = frame;
    }

    public void actionPerformed(ActionEvent event)
    {
        addNewStudent();
    }

    public void addNewStudent()
    {
        dialog = new JDialog(frame,"Add Record",true);

        dialog.setContentPane(new NewStudent(dialog).getPanel());
        dialog.pack();
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }
}
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/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class Delete extends AbstractAction
{
    private StudentList studentList = new StudentList();
    private JFrame      frame = null;

    public Delete(String commandAction,JFrame frame)
    {
        super(commandAction);
        this.frame = frame;
    }

    public void actionPerformed(ActionEvent event)
    {
        if(studentList.getList().size() != 0)
        {
            int n = JOptionPane.showConfirmDialog(
                                frame,
                                "Are you sure? you want to  delete this record 'student'",
                                "Confirm delete",
                                JOptionPane.YES_NO_OPTION);

            if(n == JOptionPane.YES_OPTION)
            {
                deleteStudentRecord();
            }
        }
    }

    public void deleteStudentRecord()
    {
        studentList.getList().remove(studentList.getRecord());

        if(studentList.getList().size() != 0)
        {
            Student student = (Student)studentList.getList().getLast();

            studentList.setRecord(studentList.getList().size() - 1);

            new StudentRecordGUI(studentList.getRecord() + 1);
            new StudentRecordGUI(student.getFirstName(),
                                 student.getLastName(),
                                 student.getIdNum(),
                                 student.getCourse(),
                                 student.getYearLevel());
        }
        else
        {
            new StudentRecordGUI(false);
            new StudentRecordGUI(0);
            new StudentRecordGUI("","",0,"","");
        }

    }
}
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/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.event.*;

import javax.swing.*;

public class Edit extends AbstractAction
{
    StudentList studentList = new StudentList();
    Student     student     = null;

    private JFrame  frame   = null;
    private JDialog dialog  = null;

    public Edit(String commandAction,JFrame frame)
    {
        super(commandAction);
        this.frame = frame;
    }

    public void actionPerformed(ActionEvent event)
    {
        try
        {
            if(studentList.getList().getFirst() != null)
            {
                editStudentProfile();
            }
            else
            {
                JOptionPane.showMessageDialog(
                        frame,
                        "Empty student record.",
                        "Edit",
                        JOptionPane.ERROR_MESSAGE);
            }
        }
        catch(Exception e)
        {
            JOptionPane.showMessageDialog(
                        frame,
                        "Empty student record.",
                        "Edit",
                        JOptionPane.ERROR_MESSAGE);
        }
    }

    public void editStudentProfile()
    {
        int i = studentList.getRecord();
        student = (Student)studentList.getList().get(i);

        studentList.setRecord(i);

        dialog = new JDialog(frame,"Edit Student Profile",true);
        dialog.setContentPane(new EditProfile(student,dialog,i).getPanel());
        dialog.pack();
        dialog.setLocationRelativeTo(frame);
        dialog.setVisible(true);
    }
}


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/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class EditProfile extends JPanel
{
    private StudentList studentList = new StudentList();
    private Student     student;

    private JPanel      panel,mainPanel,txtLblPanel,btnPanel,iconPanel;

    private JLabel      label,lblIcon;
    private JTextField  firstName, lastName, idNum;
    private JButton     btnSave,btnExt;

    private JComboBox   course,yearLevel;
    private JDialog     dialog;

    private String[]    listOfCourse = {
                                         "SELECT COURSE","",
                                         "ACCOUNTANCY",
                                         "BANKING IN FINANACE",
                                         "COMPUTER SCIENCE",
                                         "CRIMINOLOGY",
                                         "COM - E",
                                         "ELECTRONIC COMM - E",
                                         "INFORMATION TECHNOLOGY",
                                         "MANAGEMENT",
                                         "MARINE ENGINEERING",
                                         "NURCING",
                                         "NAUTICAL"
                                        };

    private String[]    levelYear    = {
                                         "1TH YEAR",
                                         "2TH YEAR",
                                         "3TH YEAR",
                                         "4TH YEAR",
                                         "5TH YEAR"
                                        };
    private int index;

    public EditProfile(Student student,JDialog dialog,int index)
    {
        this();
        this.dialog  = dialog;
        this.index   = index;

        firstName.setText(student.getFirstName());
        lastName.setText(student.getLastName());
        idNum.setText(String.valueOf(student.getIdNum()));
        course.setSelectedItem(student.getCourse());
        yearLevel.setSelectedItem(student.getYearLevel());
    }

    public EditProfile()
    {
        panel = new JPanel();

        panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
        panel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        txtLblPanel = new JPanel();
        iconPanel   = new JPanel();
        btnPanel    = new JPanel();

        addLayout();

        mainPanel = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS));
        mainPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        mainPanel.add(txtLblPanel);
        mainPanel.add(Box.createRigidArea(new Dimension(5,5)));
        mainPanel.add(btnPanel);

        panel.add(iconPanel);
        panel.add(mainPanel);
    }

    public JPanel getPanel()
    {
        return panel;
    }

    public void addLayout()
    {
        JPanel lblPanel = new JPanel();
        lblPanel.setLayout(new GridLayout(5,1,5,1));
            lblPanel.add(label = new JLabel("Student Id :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("First Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Last Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Course :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Year Level :",JLabel.RIGHT));

        JPanel txtPanel = new JPanel();
        txtPanel.setLayout(new GridLayout(5,1));
            txtPanel.add(idNum      = new JTextField(15));
            txtPanel.add(firstName  = new JTextField(15));
            txtPanel.add(lastName   = new JTextField(15));
            txtPanel.add(course     = new JComboBox(listOfCourse));
            txtPanel.add(yearLevel  = new JComboBox(levelYear));

            idNum.setHorizontalAlignment(JTextField.CENTER);
            firstName.setHorizontalAlignment(JTextField.CENTER);
            lastName.setHorizontalAlignment(JTextField.CENTER);

        btnPanel.setLayout(new FlowLayout(FlowLayout.CENTER,5,0));
            btnPanel.add(btnSave = new JButton("Save"));
            btnPanel.add(btnExt  = new JButton("Close"));

        txtLblPanel.setLayout(new BoxLayout(txtLblPanel, BoxLayout.LINE_AXIS));
            txtLblPanel.add(lblPanel);
            txtLblPanel.add(Box.createRigidArea(new Dimension(5,5)));
            txtLblPanel.add(txtPanel);

        iconPanel.setLayout(new FlowLayout(FlowLayout.RIGHT,1,1));
            iconPanel.add(lblIcon = new JLabel(new ImageIcon("image/wi0062-32.gif"),JLabel.LEFT));
            iconPanel.setBorder(BorderFactory.createEtchedBorder());

        btnSave.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                int n = JOptionPane.showConfirmDialog(
                                    dialog,
                                    "Continue save?",
                                    "Confirm save",
                                    JOptionPane.YES_NO_OPTION);
                if(n == JOptionPane.YES_OPTION)
                {
                    save();
                    message();
                    dispose();
                }
            }
        });

        btnExt.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                dispose();
            }
        });
    }

    public void save()
    {
        student = new Student(firstName.getText().trim(),
                              lastName.getText().trim(),
                              Integer.valueOf(idNum.getText().trim()),
                              String.valueOf(course.getSelectedItem()),
                              String.valueOf(yearLevel.getSelectedItem()));

        studentList.getList().set(index,student);

        Student update = (Student)studentList.getList().get(index);
        new StudentRecordGUI(update.getFirstName(),
                             update.getLastName(),
                             update.getIdNum(),
                             update.getCourse(),
                             update.getYearLevel());
    }

    public void message()
    {
        JOptionPane.showMessageDialog(
                    dialog,
                    "Successfull.",
                    "Message",
                    JOptionPane.INFORMATION_MESSAGE);
    }

    public void dispose()
    {
        dialog.setVisible(false);
        dialog.dispose();
    }
}


----------------------------------------------------------------



/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.util.*;
import java.awt.event.*;

import javax.swing.*;

public class First extends AbstractAction
{
    private StudentList studentList = new StudentList();

    public First(String command, ImageIcon icon)
    {
        super(command,icon);
    }

    public void actionPerformed(ActionEvent event)
    {
        try
        {
            Student student = (Student)studentList.getList().getFirst();

            studentList.setRecord(0);

            new StudentRecordGUI(1);
            new StudentRecordGUI(student.getFirstName(),
                                 student.getLastName(),
                                 student.getIdNum(),
                                 student.getCourse(),
                                 student.getYearLevel());
        }
        catch(Exception e)
        {}

    }
}


--------------------------------------------------------------------------------

/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.event.*;

import javax.swing.*;

public class Last extends AbstractAction
{
    StudentList studentList = new StudentList();

    public Last(String command,ImageIcon icon)
    {
        super(command,icon);
    }

    public void actionPerformed(ActionEvent event)
    {
        try
        {
            Student student = (Student)studentList.getList().getLast();

            studentList.setRecord(studentList.getList().size() - 1);

            new StudentRecordGUI(studentList.getSize());
            new StudentRecordGUI(student.getFirstName(),
                                 student.getLastName(),
                                 student.getIdNum(),
                                 student.getCourse(),
                                 student.getYearLevel());
        }
        catch(Exception e)
        {}
    }
}


-------------------------------------------------------------




public class MyException extends Exception
{
    public MyException(String message)
    {
        super(message);
    }
}


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/*
 *  Name:       Ryan Nilo Ybanez
 *  Course:     BSCS - IV
 *
 **/

public class MyLinkedList
{
    private Node head,tail;
    private int size;

    public void add(Object data)
    {
        addEnd(data);
        size++;
    }

    public void addFront(Object data)
    {
        Node newNode = new Node(data,null);
        newNode.setNext(head);
        head = newNode;
    }

    public void addEnd(Object data)
    {
        if(isEmpty()){
            head = new Node(data,null);
            tail = head;
        }
        else{
            Node p = tail;
            tail = new Node(data,p.getNext());
            p.setNext(tail);
        }
    }

    public boolean remove(Object data)
    {
        boolean remove = false;
        Node p = head;
        Node prev = head;

        if(p.getData().equals(data)){
            head = p.getNext();
            p.setNext(null);
            remove = true;
        }
        else{
            while(p.getNext() != null){
                prev = p;
                p = p.getNext();

                if(p.getData().equals(data)){
                    prev.setNext(p.getNext());
                    p.setNext(null);
                    remove = true;
                }
            }
        }
        System.gc();
        return remove;
    }

    public Object getFirst()
    {
        return head.getData();
    }

    public Object getLast()
    {
        return tail.getData();
    }

    public int size()
    {
        return size;
    }

    public boolean isEmpty()
    {
        return head == null;
    }

    public String toString()
    {
        StringBuffer sb = new StringBuffer();

        Node p = head;

        while(p != null)
        {
            sb.append(p.getData());
            p = p.getNext();
            if(p != null)
            {
                sb.append(",");
            }
        }
        return sb.toString();
    }

    public static void main(String[] args)
    {
        MyLinkedList linklist = new MyLinkedList();
        StringBuffer sb = new StringBuffer();

        linklist.add("adsf");
        linklist.add("02938");
        linklist.add("asdfasdf");
        System.out.println(linklist);
    }
}


-----------------------------------------------------


/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.util.*;
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class NewStudent extends JFrame
{
    static private LinkedList list = new LinkedList();
    static private Student newStudent;

    private JPanel      panel,mainPanel,txtLblPanel,btnPanel,iconPanel;

    private JLabel      label,lblIcon;
    private JTextField  firstName, lastName, idNum;
    private JButton     btnAdd,btnExt;

    private JComboBox   course,yearLevel;
    private JDialog     dialog;

    private String[]    listOfCourse = {
                                         "[ SELECT COURSE ]",
                                         "ACCOUNTANCY",
                                         "BANKING IN FINANACE",
                                         "COMPUTER SCIENCE",
                                         "CRIMINOLOGY",
                                         "COM - E",
                                         "ELECTRONIC COMM - E",
                                         "INFORMATION TECHNOLOGY",
                                         "MANAGEMENT",
                                         "MARINE ENGINEERING",
                                         "NURCING",
                                         "NAUTICAL"
                                        };

    private String[]    levelYear    = {
                                         "[ SELECT LEVEL ]",
                                         "1TH YEAR",
                                         "2TH YEAR",
                                         "3TH YEAR",
                                         "4TH YEAR",
                                         "5TH YEAR"
                                        };

    public NewStudent(JDialog dialog)
    {
        this();
        this.dialog = dialog;
    }

    public NewStudent()
    {
        panel = new JPanel();

        panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
        panel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        txtLblPanel = new JPanel();
        iconPanel   = new JPanel();
        btnPanel    = new JPanel();

        addLayout();

        mainPanel = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS));
        mainPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        mainPanel.add(txtLblPanel);
        mainPanel.add(Box.createRigidArea(new Dimension(5,5)));
        mainPanel.add(btnPanel);

        panel.add(iconPanel);
        panel.add(mainPanel);
    }

    public void addLayout()
    {
        JPanel lblPanel = new JPanel();
        lblPanel.setLayout(new GridLayout(5,1,5,1));
            lblPanel.add(label = new JLabel("Student Id :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("First Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Last Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Course :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Year Level :",JLabel.RIGHT));

        JPanel txtPanel = new JPanel();
        txtPanel.setLayout(new GridLayout(5,1));
            txtPanel.add(idNum      = new JTextField(15));
            txtPanel.add(firstName  = new JTextField(15));
            txtPanel.add(lastName   = new JTextField(15));
            txtPanel.add(course     = new JComboBox(listOfCourse));
            txtPanel.add(yearLevel  = new JComboBox(levelYear));

            idNum.setHorizontalAlignment(JTextField.CENTER);
            firstName.setHorizontalAlignment(JTextField.CENTER);
            lastName.setHorizontalAlignment(JTextField.CENTER);

        btnPanel.setLayout(new FlowLayout(FlowLayout.CENTER,5,0));
            btnPanel.add(btnAdd = new JButton("Add"));
            btnPanel.add(btnExt = new JButton("Close"));

        txtLblPanel.setLayout(new BoxLayout(txtLblPanel, BoxLayout.LINE_AXIS));
            txtLblPanel.add(lblPanel);
            txtLblPanel.add(Box.createRigidArea(new Dimension(5,5)));
            txtLblPanel.add(txtPanel);

        iconPanel.setLayout(new FlowLayout(FlowLayout.RIGHT,1,1));
            iconPanel.add(lblIcon = new JLabel(new ImageIcon("image/wi0062-32.gif"),JLabel.LEFT));
            iconPanel.setBorder(BorderFactory.createEtchedBorder());

        btnAdd.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                if(!isEmptyTextBox()){
                    if(!existIdNum(idNum.getText())){
                        addNewStudent();
                        message();
                        dispose();
                    }else{
                        JOptionPane.showMessageDialog(dialog,"ID number has already exist.","Message",JOptionPane.ERROR_MESSAGE);
                    }
                }
                else{
                    JOptionPane.showMessageDialog(dialog,"Please fill up the textbox complete.","Message",JOptionPane.ERROR_MESSAGE);
                }
            }
        });

        btnExt.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e)
            {
                dispose();
            }
        });
    }

    public JPanel getPanel()
    {
        return panel;
    }

    public boolean isEmptyTextBox()
    {
        return(firstName.getText().length() == 0 ||
               lastName.getText().length()  == 0 ||
               idNum.getText().length()     == 0 ||
               course.getSelectedIndex()    == 0 ||
               yearLevel.getSelectedIndex() == 0);
    }

    public void message()
    {
        JOptionPane.showMessageDialog(dialog,"Successfull","Message",JOptionPane.INFORMATION_MESSAGE);
    }

    public void addNewStudent()
    {
        newStudent = new Student(firstName.getText().trim(),
                                 lastName.getText().trim(),
                                 Integer.valueOf(idNum.getText().trim()),
                                 String.valueOf(course.getSelectedItem()),
                                 String.valueOf(yearLevel.getSelectedItem()));

        list.addLast(newStudent);

        StudentList sl = new StudentList(newStudent,list);
        System.out.println(list.size() - 1);
        sl.setRecord(list.size() - 1);

        Student student = (Student)list.getLast();

        new StudentRecordGUI(true);
        new StudentRecordGUI(list.size());
        new StudentRecordGUI(student.getFirstName(),
                             student.getLastName(),
                             student.getIdNum(),
                             student.getCourse(),
                             student.getYearLevel());
    }

    public boolean existIdNum(String idNumber)
    {
        boolean found = false;

        StudentList s = new StudentList();

        for(int i = 0; i < list.size(); i++)
        {
            Student id = (Student)s.getList().get(i);
            if(Integer.valueOf(idNumber).equals(id.getIdNum()))
            {
                found = true;
                break;
            }
        }
        return found;
    }

    public void dispose()
    {
        dialog.setVisible(false);
        dialog.dispose();
    }
}


---------------------------------------------------------------------------

/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.event.*;

import javax.swing.*;

public class Next extends AbstractAction
{
    StudentList studentList = new StudentList();
    private int size;


    public Next(String command,ImageIcon icon)
    {
        super(command,icon);
    }

    public void actionPerformed(ActionEvent event)
    {
        try{
            if(studentList.getRecord() < studentList.getSize())
                {
                    int i = studentList.getRecord();
                    Student student = (Student)studentList.getList().get(i + 1);

                    studentList.setRecord(++i);

                    new StudentRecordGUI(1 + i);
                    new StudentRecordGUI(student.getFirstName(),
                                         student.getLastName(),
                                         student.getIdNum(),
                                         student.getCourse(),
                                         student.getYearLevel());
            }
        }
        catch(Exception e)
        {}
    }
}


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public class Node
{
    private Object data;
    private Node next;

    public Node()
    {
        data = null;
        next = null;
    }

    public Node(Object data)
    {
        this.data = data;
    }

    public Node(Object data,Node next)
    {
        this.data = data;
        this.next = next;
    }

    public void setNext(Node n)
    {
        next = n;
    }

    public Node getNext()
    {
        return next;
    }

    public Object getData()
    {
        return data;
    }
}


--------------------------------------------------------------------------------



/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

public class Person
{
    private String fName;
    private String lName;

    public Person(String firstname, String lastname)
    {
        fName = firstname;
        lName = lastname;
    }

    public void setFirstName(String firstname)
    {
        fName = firstname;
    }

    public void setLastName(String lastname)
    {
        lName = lastname;
    }

    public String getFirstName()
    {
        return fName;
    }

    public String getLastName()
    {
        return lName;
    }
}


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/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.event.*;
import javax.swing.*;

public class Prev extends AbstractAction
{
    StudentList studentList = new StudentList();

    public Prev(String command,ImageIcon icon)
    {
        super(command,icon);
    }

    public void actionPerformed(ActionEvent event)
    {
        try
        {
            prevStudentRecord();
        }
        catch(Exception e)
        {}
    }

    public void prevStudentRecord()
    {
        if(studentList.getRecord() != 0)
        {
            int i = studentList.getRecord();

                Student student = (Student)studentList.getList().get(i - 1);
                studentList.setRecord(--i);

                new StudentRecordGUI(i + 1);
                new StudentRecordGUI(student.getFirstName(),
                                     student.getLastName(),
                                     student.getIdNum(),
                                     student.getCourse(),
                                     student.getYearLevel());
        }
    }
}

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/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.awt.event.*;

import javax.swing.*;

public class Search extends AbstractAction
{
    private StudentList studentList = new StudentList();

    private JFrame      frame;
    private JOptionPane dialog;

    public Search(String commandAction,JFrame frame)
    {
        super(commandAction);
        this.frame = frame;
    }

    public void actionPerformed(ActionEvent event)
    {
        Object[] search = {"ID #","FirstName","LastName"};
        String s = (String)dialog.showInputDialog(
                                  frame,
                                  "Search By:",
                                  "Search",
                                  JOptionPane.PLAIN_MESSAGE,
                                  null,
                                  search,
                                  "ID #");

        if(s == "ID #")
        {
            boolean foundID = false;
            String id = JOptionPane.showInputDialog(
                                    frame,
                                    "Search " + s +":",
                                    "Search",
                                    JOptionPane.PLAIN_MESSAGE);
            if(id != null && id.length() != 0){
                for(int i = 0; i < studentList.getSize(); i++){
                    Student student = (Student)studentList.getList().get(i);
                    if(Integer.valueOf(id).equals(student.getIdNum())){
                        studentList(student,i);
                        foundID = true;
                        break;
                    }
                }
                if(foundID == false)
                {
                    JOptionPane.showMessageDialog(frame,
                                                  "Searching,"+" " + id +" "+"does not exist.",
                                                  "Search",
                                                  JOptionPane.ERROR_MESSAGE);
                }
            }
        }
        else if(s == "FirstName")
        {
            boolean foundFirstName = false;
            String firstname = (String)JOptionPane.showInputDialog(
                                           frame,
                                           "Search " + s +":",
                                           "Search",
                                           JOptionPane.PLAIN_MESSAGE);
            if(firstname != null && firstname.length() != 0){
                for(int i = 0; i < studentList.getSize(); i++){
                    Student student = (Student)studentList.getList().get(i);
                    if(firstname.equals(student.getFirstName())){
                        studentList(student,i);
                        foundFirstName = true;
                        break;
                    }
                }
                if(foundFirstName == false)
                {
                    JOptionPane.showMessageDialog(frame,
                                                  "Searching,"+" " + firstname +" "+"does not exist.",
                                                  "Search",
                                                  JOptionPane.ERROR_MESSAGE);
                }
            }
        }
        else if(s == "LastName")
        {
            boolean foundLastName = false;
            String lastname = JOptionPane.showInputDialog(
                                           frame,
                                           "Search " + s +":",
                                           "Search",
                                           JOptionPane.PLAIN_MESSAGE);
            if(lastname != null && lastname.length() != 0){
                for(int i = 0; i < studentList.getSize(); i++){
                    Student student = (Student)studentList.getList().get(i);
                    if(lastname.equals(student.getLastName())){
                        studentList(student,i);
                        foundLastName = true;
                        break;
                    }
                }
                if(foundLastName  == false)
                {
                    JOptionPane.showMessageDialog(frame,
                                                  "Searching,"+" " + lastname +" "+"does not exist.",
                                                  "Search",
                                                  JOptionPane.ERROR_MESSAGE);
                }
            }
        }
    }

    public void studentList(Student student,int index)
    {
        student = (Student)studentList.getList().get(index);

        studentList.setRecord(index);

        new StudentRecordGUI(studentList.getRecord() + 1);
        new StudentRecordGUI(student.getFirstName(),
                             student.getLastName(),
                             student.getIdNum(),
                             student.getCourse(),
                             student.getYearLevel());
    }
}


------------------------------------------------------------------------------


/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

public class Student extends Person
{
    private Integer id;
    private String course;
    private String level;

    public Student(String firstname, String lastname, Integer id, String course, String level)
    {
        super(firstname,lastname);
        this.id     = id;
        this.course = course;
        this.level  = level;
    }

    public void setId(Integer id)
    {
        this.id = id;
    }

    public void SetCourse(String course)
    {
        this.course = course;
    }

    public void setLevel(String level)
    {
        this.level = level;
    }

    public Integer getIdNum()
    {
        return id;
    }

    public String getCourse()
    {
        return course;
    }

    public String getYearLevel()
    {
        return level;
    }
}


--------------------------------------------------------------------------



/*
 *  Name    Ryan Nilo Ybañez
 *  Course  BSCS - IV
 *  Subject Data Structure java implemented
 *
 **/

import java.util.*;

public class StudentList
{
    static Student student = null;
    static LinkedList list = null;
    static int record;

    public StudentList()
    {}

    public StudentList(Student student,LinkedList list)
    {
        this.student = student;
        this.list    = list;
    }

    public Student getStudentList()
    {
        return student;
    }

    public void setRecord(int n)
    {
        record = n;
    }

    public int getRecord()
    {
        return record;
    }

    public LinkedList getList()
    {
        return list;
    }

    public static int getSize()
    {
        return list.size();
    }
}


--------------------------------------------------------------------------------




/*
 *  Name    Ryan Nilo Ybañez
 *
 **/

import java.util.*;
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.border.*;

public class StudentRecordGUI extends JPanel
{
    static private final int BUTTON_INDEX = 8;

    static private JFrame       frame;
    static private JTextField   firstName, lastName, idNum, course, yearLevel;
    static private JLabel       numRecord;
    static private JButton[]    button = new JButton[BUTTON_INDEX];

    private JPanel      mainPanel, iconPanel,txtLblPanel;
    private JPanel      symPanel, comPanel;
    private JLabel      label, lblIcon;
    private JDialog     dialog;

    private JButton     btnCount;
    private Action      add,delete,search,edit,first,last,prev,next,count;

    public StudentRecordGUI(JFrame frame)
    {
        add     = new Add("Add",frame);
        delete  = new Delete("Delete",frame);
        search  = new Search("Search",frame);
        edit    = new Edit("Edit",frame);

        first   = new First(null,new ImageIcon("image/first.gif"));
        last    = new Last(null, new ImageIcon("image/last.gif"));
        prev    = new Prev(null, new ImageIcon("image/prev.gif"));
        next    = new Next(null, new ImageIcon("image/next.gif"));

        setLayout(new BorderLayout());
        setBorder(BorderFactory.createEmptyBorder(5,5,5,5));

        JToolBar toolBar = new JToolBar("ToolBar");
        toolBar.setFloatable(false);
        toolBar.setRollover(true);

        txtLblPanel = new JPanel();
        iconPanel   = new JPanel();
        symPanel    = new JPanel();
        comPanel    = new JPanel();

        toolBar.add(button[0] = new JButton(first));
        toolBar.add(button[1] = new JButton(prev));
        toolBar.add(button[2] = new JButton(next));
        toolBar.add(button[3] = new JButton(last));
        toolBar.addSeparator();
        toolBar.add(numRecord = new JLabel("Record #: 0"));

        button[4] = new JButton(add);
        button[5] = new JButton(edit);
        button[6] = new JButton(search);
        button[7] = new JButton(delete);

        button[5].setEnabled(false);
        button[6].setEnabled(false);
        button[7].setEnabled(false);

        button[4].setPreferredSize(new Dimension(80,26));
        button[5].setPreferredSize(new Dimension(80,26));
        button[6].setPreferredSize(new Dimension(80,26));
        button[7].setPreferredSize(new Dimension(80,26));

        button[0].setToolTipText("First");
        button[1].setToolTipText("Previous");
        button[2].setToolTipText("Next");
        button[3].setToolTipText("Last");

        addLayout();

        mainPanel   = new JPanel();
        mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.PAGE_AXIS));
        mainPanel.setBorder(BorderFactory.createCompoundBorder(
                            BorderFactory.createTitledBorder("Student Information"),
                            BorderFactory.createEmptyBorder(5,5,5,5)));

        mainPanel.add(txtLblPanel);

        JPanel layout = new JPanel();
            layout.setLayout(new BoxLayout(layout, BoxLayout.PAGE_AXIS));
            layout.add(Box.createRigidArea(new Dimension(5,5)));
            layout.add(iconPanel);
            layout.add(Box.createRigidArea(new Dimension(5,5)));
            layout.add(mainPanel);
            layout.add(Box.createRigidArea(new Dimension(5,5)));
            layout.add(comPanel);

        add(toolBar, BorderLayout.PAGE_START);
        add(layout,  BorderLayout.PAGE_END);

    }

    public StudentRecordGUI(boolean tF)
    {
        button[5].setEnabled(tF);
        button[6].setEnabled(tF);
        button[7].setEnabled(tF);
    }

    public StudentRecordGUI(int n)
    {
        numRecord.setText("Record #: " + String.valueOf(n));
    }

    public StudentRecordGUI(String firstname, String lastname, Integer num, String c, String yearlevel)
    {
        idNum.setText(String.valueOf(num));
        firstName.setText(firstname);
        lastName.setText(lastname);
        course.setText(c);
        yearLevel.setText(yearlevel);
    }

    public void addLayout()
    {
        JPanel lblPanel = new JPanel();
        lblPanel.setLayout(new GridLayout(5,1,25,5));
            lblPanel.add(label = new JLabel("Student Id :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("First Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Last Name :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Course :",JLabel.RIGHT));
            lblPanel.add(label = new JLabel("Year Level :",JLabel.RIGHT));

        JPanel txtPanel = new JPanel();
        txtPanel.setLayout(new GridLayout(5,1,25,0));
            txtPanel.add(idNum      = new JTextField(25));
            txtPanel.add(firstName  = new JTextField(25));
            txtPanel.add(lastName   = new JTextField(25));
            txtPanel.add(course     = new JTextField(25));
            txtPanel.add(yearLevel  = new JTextField(25));

            idNum.setHorizontalAlignment(JTextField.CENTER);
            firstName.setHorizontalAlignment(JTextField.CENTER);
            lastName.setHorizontalAlignment(JTextField.CENTER);
            course.setHorizontalAlignment(JTextField.CENTER);
            yearLevel.setHorizontalAlignment(JTextField.CENTER);

            idNum.setFocusable(false);
            firstName.setFocusable(false);
            lastName.setFocusable(false);
            course.setFocusable(false);
            yearLevel.setFocusable(false);

        txtLblPanel.setLayout(new BoxLayout(txtLblPanel, BoxLayout.LINE_AXIS));
            txtLblPanel.add(lblPanel);
            txtLblPanel.add(Box.createRigidArea(new Dimension(5,5)));
            txtLblPanel.add(txtPanel);
            txtLblPanel.setPreferredSize(new Dimension(350,130));

        comPanel.setLayout(new FlowLayout(FlowLayout.CENTER,5,0));
            for(int i = 4; i < button.length; i++){
                comPanel.add(button[i]);
                button[i].setFont(new Font("sans-serif",Font.PLAIN,10));
            }

        iconPanel.setLayout(new FlowLayout(FlowLayout.RIGHT,1,1));
            iconPanel.add(lblIcon = new JLabel(new ImageIcon("image/wi0054-32.gif")));
            iconPanel.setBorder(BorderFactory.createEtchedBorder());
    }

    public static void createAndShowGUI()
    {
        JFrame frame = new JFrame("Student Record");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setContentPane(new StudentRecordGUI(frame));

        frame.pack();
        frame.setVisible(true);
        frame.setResizable(false);
    }

    public static void main(String[] args)
    {
        Runnable doRun = new Runnable(){
            public void run(){
                createAndShowGUI();
            }
        };

        javax.swing.SwingUtilities.invokeLater(doRun);
    }
}


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