MainStack

public class MainStack {
    public static void main(String[] args) {
        Stack test = new Stack();
        test.push(40);
        test.push(20);
        test.push(30);
        System.out.println("Stack :" + test.tumpukan.toString());
        System.out.println("Ukuran :" + test.size());
        System.out.println("Setelah di POP :");
        test.pop();
        System.out.println("Stack :" + test.tumpukan.toString());
        System.out.println("Ukuran :" + test.size());
    }
}

Stack

import LinkedLstHead.LinkedList;
import LinkedLstHead.ListNode;


public class Stack {
    LinkedList tumpukan;
    public Stack() {
        tumpukan = new LinkedList();
    }
    public void push(int data) {
        tumpukan.addFirst(data);
    }
    public int pop() {
        return tumpukan.removeFirst();
    }
    public int size() {
        return tumpukan.getSize();
    }
    public boolean isEmpty() {
        if (tumpukan.isEmpty()) {
            return true;
        } else {
            return false;
        }
    }
}

ListNode

package LinkedListObject;
public class ListNode {


    Object element;
    ListNode next;
    ListNode prev;


    public ListNode() {
    }
    public ListNode(Object element) {
        this.element = element;
    }
    public Object getElement() {
        return element;
    }
    public void setElement(Object element) {
        this.element = element;
    }
    public ListNode getNext() {
        return next;
    }
    public void setNext(ListNode next) {
        this.next = next;
    }
    public ListNode getPrev() {
        return prev;
    }
    public void setPrev(ListNode prev) {
        this.prev = prev;
    }
}

LinkedList

public class LinkedList {


    int size;
    ListNode head;


    public LinkedList() {
        head = new ListNode();
        head.next = head;
        head.prev = head;
        size = 0;
    }
    private ListNode addBefore(int x, ListNode bantu) {
        ListNode baru = new ListNode(x);
        baru.next = bantu;
        baru.prev = bantu.prev;
        bantu.prev.next = baru;
        bantu.prev = baru;
        size++;
        return baru;
    }
    private int remove(ListNode bantu) {
        if (isEmpty()) {
            System.out.println("Senarai Kosong");
        } else {
            bantu.next.setPrev(bantu.getPrev());
            bantu.prev.setNext(bantu.getNext());
            bantu.setNext(null);
            bantu.setPrev(null);
        }
        size--;
        return bantu.getElement();
    }
    public void addFirst(int x) {
        addBefore(x, getHead().getNext());
    }
    public void addLast(int x) {
        addBefore(x, getHead());
    }
    public int removeFirst() {
        return remove(getHead().getNext());


    }
    public int removeLast() {
        return remove(getHead().getPrev());


    }
    public int remove(int x) {
        ListNode bantu = head;
        if (isEmpty()) {
            System.out.println("Senarai kosong");
        } else {
            while (bantu.next != head) {
                bantu = bantu.next;
                if (bantu.element == x) {
                    remove(bantu);
                    break;
                }
            }
        }
        return bantu.element;
    }
    public void addSort(int x) {


        if (isEmpty()) {
            addBefore(x, head.next);
        } else {
            ListNode bantu = head.next;
            while (bantu != head && x > bantu.element) {
                bantu = bantu.next;
            }
            addBefore(x, bantu);
        }
    }
    public String toString() {
        String string = new String();
        ListNode bantu = head;
        while (bantu.next != head) {
            bantu = bantu.next;
            string += bantu.element + " ";
        }
        if (isEmpty()) {
            return "Senarai Kosong";
        } else {
            return string;
        }
    }
    public void display() {
        ListNode bantu = head;
        while (bantu.next != head) {
            bantu = bantu.next;
            System.out.println(bantu.element);
        }
    }
    public ListNode search(int x) {
        ListNode bantu = head;
        while (bantu.next != head) {
            bantu = bantu.next;
            if (bantu.element == x) {
                return bantu;
            }
        }
        System.out.println("Tidak ditemukan");
        return head;
    }
    public boolean isEmpty() {
        if (head.next == head) {
            return true;
        } else {
            return false;
        }
    }
    public int getSize() {
        return size;
    }
    public void setSize(int size) {
        this.size = size;
    }
    public ListNode getHead() {
        return head;
    }
    public void setHead(ListNode head) {
        this.head = head;
    }
}

RegexSubstitution (string)

public class RegexSubstitution {

    public static void main(String args[]) {
        String firstString = "Every day is sunday";
        String secondString = "Vini pergi ke pasar 3 jam lalu, bersama 4 temannya";

        System.out.printf("Original String 1: %s\n", firstString);
        firstString = firstString.replaceAll("\\bday\\b", "week there"); // jelaskan
        System.out.printf(
                "Original string 1 become : %s\n", firstString);

        System.out.printf("Original String 2: %s\n", secondString);//%s = diisi dengan string
        secondString = secondString.replaceAll("[a]", "o");//jelaskan
        System.out.printf(
                "Original string 2 become : %s\n", secondString);

        System.out.printf("Every word replaced by \"word\": %s\n\n",
                firstString.replaceAll("\\w+", "word")); // jelaskan

        secondString = secondString.replaceFirst("\\d", "digit");
        // jelaskan
        System.out.printf("?? %s\n", secondString); //isilah ?? dengan kalimat yang sesuai

        String output = "String split at commas: [";
        String[] results = secondString.split(",\\s*"); // jelaskan

        for (String string : results) // jelaskan sintaks ini
        {
            output += "\"" + string + "\", ";
        }
        System.out.println("Hasil split : " + output);
        output = output.substring(0, output.length() - 2) + "]";
        System.out.println(output);
    } // end main
}

ReadDataDemo (stream)

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class ReadDataDemo {
/** Creates a new instance of ReadDataDemo */
    public ReadDataDemo() {
    }
     public static void main(String[] args) {
        // write the data out with FileOutputStream
        // buat file
        File inputFile = new File("latihan.txt");
        try{
        // buka stream
        FileInputStream in = new FileInputStream(inputFile);
        // buat buffer pembacaan data
        String testInput = new String();
        // variabel integer untuk membaca data dari file yang dibuka
        int c;
        // cek akhir dari file apakah bernilai -1
        while((c=in.read())!=-1){
            // tambahkan data pembacaan ke buffer
            testInput += (char)c;
        }
        // tutup stream
        in.close();
        System.out.println(testInput);
        } catch (IOException ex){
            System.out.println(ex.getMessage());
        }
    }

}

FileChooserDemo (string)

package String;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.*;

public class FileChooserDemo extends JPanel
                             implements ActionListener {
    static private final String newline = "\n";
    JButton openButton, saveButton;
    JTextArea log;
    JFileChooser fc;

    public FileChooserDemo() {
        super(new BorderLayout());

        //Create the log first, because the action listeners
        //need to refer to it.
        log = new JTextArea(5,20);
        log.setMargin(new Insets(5,5,5,5));
        log.setEditable(false);
        JScrollPane logScrollPane = new JScrollPane(log);

        //Create a file chooser
        fc = new JFileChooser();

        //Uncomment one of the following lines to try a different
        //file selection mode.  The first allows just directories
        //to be selected (and, at least in the Java look and feel,
        //shown).  The second allows both files and directories
        //to be selected.  If you leave these lines commented out,
        //then the default mode (FILES_ONLY) will be used.
        //
        //fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
        //fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);

        //Create the open button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        openButton = new JButton("Open a File...");
//                                 createImageIcon("images/Open16.gif"));
        openButton.addActionListener(this);

        //Create the save button.  We use the image from the JLF
        //Graphics Repository (but we extracted it from the jar).
        saveButton = new JButton("Save a File...");
//                                 createImageIcon("images/Save16.gif"));
        saveButton.addActionListener(this);

        //For layout purposes, put the buttons in a separate panel
        JPanel buttonPanel = new JPanel(); //use FlowLayout
        buttonPanel.add(openButton);
        buttonPanel.add(saveButton);

        //Add the buttons and the log to this panel.
        add(buttonPanel, BorderLayout.PAGE_START);
        add(logScrollPane, BorderLayout.CENTER);
    }

    @Override
    public void actionPerformed(ActionEvent e) {

        //Handle open button action.
        if (e.getSource() == openButton) {
            int returnVal = fc.showOpenDialog(FileChooserDemo.this);

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();
                //This is where a real application would open the file.
                log.append("Opening: " + file.getName() + "." + newline);
            } else {
                log.append("Open command cancelled by user." + newline);
            }
            log.setCaretPosition(log.getDocument().getLength());

        //Handle save button action.
        } else if (e.getSource() == saveButton) {
            int returnVal = fc.showSaveDialog(FileChooserDemo.this);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();
                //This is where a real application would save the file.
                log.append("Saving: " + file.getName() + "." + newline);
            } else {
                log.append("Save command cancelled by user." + newline);
            }
            log.setCaretPosition(log.getDocument().getLength());
        }
    }

    /** Returns an ImageIcon, or null if the path was invalid. */
    protected static ImageIcon createImageIcon(String path) {
        java.net.URL imgURL = FileChooserDemo.class.getResource(path);
        if (imgURL != null) {
            return new ImageIcon(imgURL);
        } else {
            System.err.println("Couldn't find file: " + path);
            return null;
        }
    }

    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event dispatch thread.
     */
    private static void createAndShowGUI() {
        //Create and set up the window.
        JFrame frame = new JFrame("FileChooserDemo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Add content to the window.
        frame.add(new FileChooserDemo());

        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event dispatch thread:
        //creating and showing this application's GUI.
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                //Turn off metal's use of bold fonts
                UIManager.put("swing.boldMetal", Boolean.FALSE);
                createAndShowGUI();
            }
        });
    }
}

cobaSimpan

import java.io.*;

public class cobaSimpan {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        Document test = new Document("coba1.txt");
        String subjek[] = {"saya", "adik"};
        String predikat[] = {"makan", "mimum"};
        String objek[] = {"Soto", "susu"};
        for (int i = 0; i < subjek.length; i++) {
            test.setTeks(test.getTeks() + subjek[i] + "\t" + predikat[i] + "\t" + objek[i] + "\n");
        }
        test.simpan();
    }
}

cobaBaca

import java.io.*;

public class cobaBaca {

    public static void main(String[] args) throws FileNotFoundException, IOException {
        Document test = new Document("coba1.txt");
        test.baca();
        String delimiter = "\t";
        String temp[] = test.getTeks().split(delimiter);
        for (int i = 0; i < temp.length; i++) {
            System.out.println(temp[i]);
        }

    }
}

ListPengguna

package stream;

import java.io.IOException;
import java.util.ArrayList;
import java.util.StringTokenizer;
import project.Koleksi;
import project.Mahasiswa;
import project.Pengguna;

public class ListPengguna {

    private ArrayList daftarPengguna;
    private Document dokumen;

    public ListPengguna() {
    }

    public ListPengguna(Document dokumen) {
        this.dokumen = dokumen;
    }

    public ArrayList getDaftarPengguna() {
        return daftarPengguna;
    }

    public void setDaftarPengguna(ArrayList daftarPengguna) {
        this.daftarPengguna = daftarPengguna;
    }

    public Document getDokumen() {
        return dokumen;
    }


    public void setDokumen(Document dokumen) {
        this.dokumen = dokumen;
    }

    public boolean isKosong() {
        if (daftarPengguna == null) {
            return true;
        } else {
            return false;
        }
    }

    public void baca() throws IOException {
        dokumen.baca();
        String data = dokumen.getTeks();
        System.out.println(data);
        StringTokenizer test = new StringTokenizer(data, "[;\n\r]");
//        while(test.hasMoreTokens()){
//            System.out.println(test.nextToken());
//        }
        int jumlahAnggota = Integer.parseInt(test.nextToken());
        System.out.println("jumlah Anggota : " + jumlahAnggota);
        daftarPengguna = new ArrayList();

        for (int i = 0; i < jumlahAnggota; i++) {
            Mahasiswa test2 = new Mahasiswa();
            test2.setNim(test.nextToken());
            test2.setNama(test.nextToken());
            int jumlahPinjaman = Integer.parseInt(test.nextToken());
            System.out.println("Jumlah Pinjaman : " + jumlahPinjaman + " ");
            for (int j = 0; j < jumlahPinjaman; j++) {

                Koleksi test3 = new Koleksi();
                test3.setId(test.nextToken());
                test3.setJudul(test.nextToken());
                test3.setTglPinjam(test.nextToken());
                test2.tambahDaftarPinjaman(test3);
            }
            System.out.println(test2.tampilPinjaman());
            daftarPengguna.add(test2);
        }
    }

    public void simpan() {
        String result = " ";
        result = result + daftarPengguna.size() + ";\n";
        for (int i = 0; i < daftarPengguna.size(); i++) {
            result = result + daftarPengguna.get(i).getNama() + ";" + daftarPengguna.get(i).getDaftarPinjaman().size();
        }
        System.out.println("hasil: " + result);
    }

    public String cetak() {
        return null;
    }

    public void tambah(Pengguna pengguna) {
        if (isKosong()) {
            daftarPengguna = new ArrayList();
            daftarPengguna.add(pengguna);
        }
        daftarPengguna.add(pengguna);
    }

    public void hapus(Pengguna pengguna) {
//        if (isAda(pengguna)) {
//            daftarPengguna.remove(pengguna);
//        }
    }

    public boolean isAda(Pengguna pengguna) {
        return false;
    }
}