Fal-e-Hafez (Omens of Hafez) Cards in Persian using Java

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Fal-e Hafez
(Omens of Hafez)
Cards in Persian
Using JAVA
File I/O Concept
Random Concept
Scanner Concept
Component Orientation Concept
Prepared By: Fereshteh Nourooziyan
Edited By: Abdul Rahman Sherzad

Topics
» Introduction to Hafez Omen
» File I/O Concept
» Random Concept
» Scanner Concept
» Component Orientation Concept
» Hafez Omen Implementation
2

Hafez Biography
» Khajeh Shamseddin Mohammad Hafez Shirazi
(Persian: ‫شمس‬ ‫خواجه‬‫الدین‬‫شیرازی‬ ‫حافظ‬ ‫محمد‬ ‎ )‎, known by his
pen name Hafez (‫حافظ‬ also Hafiz) was a Persian poet.
» His collected works composed of series of Persian
literature are to be found in the homes of most people
in Afghanistan and Iran who learn his poems by heart
and use them as proverbs and sayings to this day.
» His life and poems have been the subject of much
analysis, commentary and interpretation, influencing
post-fourteenth century Persian writing more than any
other author.
3

Omens of Hafez
» In the Persian tradition, whenever one faces a
difficulty or a fork in the road, or even if one
has a general question in mind, one would hold
that question in mind, and then ask the Oracle
of "Khajeh Shamseddin Mohammad Hafez-s
Shirazi" for guidance.
4

Omens of Hafez
» There are several applications which are coded
by different programming languages such as:
˃ Java languages for Desktops and Mobiles
˃ HTML and CSS and PHP for Web Pages
» that it shows the importance of Omens of Hafez
among the Persian people.
5

Omens of Hafez Interface
6

Omens of Hafez Interface
» This application is made by using Java
Language with the help of following classes:
˃ File I/O Class
˃ Random Class
˃ Scanner Class
˃ Exception Handling
7

Streams
» A stream is an object that enables the flow of
data between a program and some I/O device
or file
˃ If the data flows into a program, then the stream is called an
input stream
˃ If the data flows out of a program, then the stream is called an
output stream
8

Streams
» Input streams can flow from the keyboard or from a file
˃ System.in is an input stream that connects to the
keyboard
Scanner keyboard = new Scanner(System.in);
» Output streams can flow to a screen or to a file
˃ System.out is an output stream that connects to the
screen
System.out.println("Output stream");
9

Text Files
» Files that are designed to be read by human beings,
and that can be read or written with an editor are
called text files
˃ Text files can also be called ASCII files because the data they
contain uses an ASCII encoding scheme
˃ An advantage of text files is that the are usually the same on
all computers, so that they can move from one computer to
another
10

File and Directory Management
» In Java Language we use an object belongs to Java.io
package.
» The object is used to store the name of the file or directory
and also the pathname.
» In addition, this object can be used to create, rename, or
delete the file or directory it represents.
» Important point to remember is that java.io.File object can
represent both File and Directory in Java.
11

File Class Constructors
» The File object represents the actual file / directory on
the disk.
» There are following constructors to create a File object:
12
File(File parent, String child); // Creates a new File instance from a parent abstract pathname
and a child pathname string.
File(String pathname); // Creates a new File instance by converting the given pathname string
into an abstract pathname.
File(String parent, String child); // Creates a new File instance from a parent pathname string
and a child pathname string.
File(URI uri); // Creates a new File instance by converting the given file: URI into an abstract
pathname.

File Class Methods Summary I
13
S.N. Method & Description
1 boolean canExecute()
This method tests whether the application can execute the file denoted by this abstract pathname.
2 boolean canRead()
This method tests whether the application can read the file denoted by this abstract pathname.
3 boolean canWrite()
This method tests whether the application can modify the file denoted by this abstract pathname.
4 int compareTo(File pathname)
This method compares two abstract pathnames lexicographically.
5 boolean createNewFile()
This method atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does
not yet exist.
6 static File createTempFile(String prefix, String suffix)
This method creates an empty file in the default temporary-file directory, using the given prefix and suffix to generate its
name.
7 static File createTempFile(String prefix, String suffix, File directory)
This method Creates a new empty file in the specified directory, using the given prefix and suffix strings to generate its name.
8 boolean delete()
This method deletes the file or directory denoted by this abstract pathname.
9 void deleteOnExit()
This method requests that the file or directory denoted by this abstract pathname be deleted when the virtual machine
terminates.
10 boolean equals(Object obj)
This method tests this abstract pathname for equality with the given object.

File Class Methods Summary II
14
S.N. Method & Description
11 boolean exists()
This method tests whether the file or directory denoted by this abstract pathname exists..
12 File getAbsoluteFile()
This method returns the absolute form of this abstract pathname.
13 String getAbsolutePath()
This method returns the absolute pathname string of this abstract pathname.
14 File getCanonicalFile()
This method returns the canonical form of this abstract pathname.
15 String getCanonicalPath()
This method returns the canonical pathname string of this abstract pathname.
16 long getFreeSpace()
This method returns the number of unallocated bytes in the partition named by this abstract path name.
17 String getName()
This method returns the name of the file or directory denoted by this abstract pathname.
18 String getParent()
This method returns the pathname string of this abstract pathname's parent, or null if this pathname does not
name a parent directory.
19 File getParentFile()
This method returns the abstract pathname of this abstract pathname's parent, or null if this pathname does not
name a parent directory.
48 …

File Creation Demo
15
import java.io.File;
public class FileCreationDemo {
public static void main(String[] args) {
File f = null;
boolean bool = false;
try {
// create new file
f = new File("E:FileDemomyFile.txt");
// tries to create new file in the system
bool = f.createNewFile();
// prints
System.out.println("File created: " + bool);
} catch (Exception e) {
System.err.println("Error creating the file!");
}
}
}

File Creation Output
16

Direction Creation Demo
17
public class DirectoryCreationDemo {
File file = new File("E:FileDemomyDirectory");
if (!file.exists()) {
if (file.mkdir()) {
System.out.println("Directory is created!");
} else {
System.out.println("Failed to create directory!");
}
}
}
}

Direction Creation Output
18

File Methods Demo
public class FileMethodsDemo {
File f = new File("E:FileDemomyFile.txt");
if (f.exists()) {
System.out.println(f.getName() + " exists.");
System.out.println(f.getName() + " size is " + f.length() + " bytes");
if (f.canRead())
System.out.println(f.getName() + " can be read.");
if (f.canWrite())
System.out.println(f.getName() + " can be write.");
if (f.isFile())
System.out.println(f.getName() + " is a file.");
} else {
System.out.println(f.getName() + " does not exists!");
}
}
}
19

File Methods Output
» myFile.txt exists.
» myFile.txt size is 0 bytes
» myFile.txt can be read.
» myFile.txt can be write.
» myFile.txt is a file.
20

Introduction to Random
» java.util.Random class generates a stream of pseudo-
random numbers.
» To create a new random number generator, use one of
the following methods:
˃ new Random(); //This creates a new random number generator
˃ new Random(long seed); //This creates a new random number generator
using a single long seed
» Using of Random Class:
˃ Random class has many usages in many programs and application which need
selecting randomly without prior planning, such as:
+ Lottery Games and Applications
+ Quotes and Speech of the Day
+ Random Advertisements 21

Some Methods of Random Class
» protected int next(int bits)
˃ This method generates the next pseudorandom number.
» Boolean nextBoolean()
˃ This method returns the next pseudorandom, uniformly distributed Boolean value
from this random number generator's sequence.
» void nextBytes(byte[] bytes)
˃ This method generates random bytes and places them into a user-supplied byte
array.
» double nextDouble()
˃ This method returns the next pseudorandom, uniformly distributed double value
between 0.0 and 1.0 from this random number generator's sequence.
» loat nextFloat()
˃ This method returns the next pseudorandom, uniformly distributed float value
between 0.0 and 1.0 from this random number generator's sequence
» long nextLong()
˃ This method returns the next pseudorandom, uniformly distributed long value
from this random number generator's sequence. 22

Random Demo
import java.util.Random;
public class RandomDemo {
public static void main(String args[]) {
Random r = new Random();
int arr[] = new int[25];
for (int i = 0; i < 1000; i++) {
arr[r.nextInt(25)]++;
}
for (int i = 0; i < 25; i++) {
System.out.println(i + " was generated " + arr[i] + " times.");
}
} //end of main
} //end of class
23

Random Demo Output
24

Scanner Class
» The java.util.Scanner class is a simple text scanner
which can parse primitive types and strings using
Regular Expressions.
» Following are the important points about Scanner
class:
˃ A Scanner breaks its input into tokens using a delimiter pattern, which by default
matches whitespace (blanks, tabs, and newline).
˃ A scanning operation may block waiting for input.
˃ A Scanner is not safe for multithreaded use without external synchronization.
25

Scanner Read File Demo
import java.io.FileNotFoundException;
import java.util.Scanner;
public class ScannerReadFileDemo {
String output = "";
Scanner in = null;
String fn = "E:FileDemomyFile.txt";
try {
in = new Scanner(new File(fn));
while (in.hasNext()) {
output += in.nextLine();
output += "n";
}
} catch (FileNotFoundException e) {
System.out.println("File does not exist !");
} finally {
in.close();
}
System.out.println(output);
}
}
26

Scanner Read File Demo Output
27

Scanner Read Keyboard Demo
public class ScannerReadKeyboardDemo {
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter the subject:");
String subject = keyboard.nextLine();
System.out.println("Enter the score:");
double score = keyboard.nextDouble();
System.out.println("Subject: " + subject);
System.out.println("Score: " + score);
}
}
28

Scanner Read Keyboard Output
29

Introduction to ComponentOrientation
» java.awt.ComponentOrientation allows components to
encapsulate language-sensitive orientation information.
» Followings are the capability of this Class is:
˃ Vertically alignment
˃ Horizontally alignment
˃ Left-to-right
˃ Right-to-left
» Therefore, by using this class capabilities we can make and
develop multi-lingual applications in JAVA.
30

ComponentOrientation Demo
import java.awt.ComponentOrientation;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JTextArea;
public class ComponentOrintationDemo extends JFrame {
JTextArea txtArea;
public ComponentOrintationDemo() {
setTitle("Component Orintation Demo");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setSize(300, 300);
txtArea = new JTextArea();
txtArea.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
txtArea.setFont(new Font("arial", Font.BOLD, 27));
add(txtArea);
setVisible(true);
}
new ComponentOrintationDemo();
}
}
31

ComponentOrientation Output
Lift to Right Right to Lift
32

Omens of Hafez Implementation
package OmensOfHafez;
import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.FileNotFoundException;
import java.util.Random;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class OmensOfHafez {
private JFrame win;
private JTextArea txtContent;
private JScrollPane scroll;
private JLabel lblCloseImage, lblCloseHover, lblBackground, lblChooser, lblBack;
private String filenames[] = { "1", "2", "3", "4", "5" }; 33

public OmensOfHafez() {
win = new JFrame();
win.setUndecorated(true);
win.setLayout(null);
win.setSize(480, 605);
win.setLocationRelativeTo(null);
lblBackground = new JLabel(new ImageIcon(getClass().getResource("Interface.PNG")));
lblCloseImage = new JLabel(new ImageIcon(getClass().getResource("btnClose.PNG")));
lblCloseHover = new JLabel(new ImageIcon(getClass().getResource("btncloseHover.PNG")));
lblBack = new JLabel(new ImageIcon(getClass().getResource("lblBack.PNG")));
win.add(lblCloseHover).setBounds(455, 0, 20, 20);
win.add(lblCloseImage).setBounds(455, 0, 20, 20);
lblBackground.add(lblBack).setBounds(0, 535, 59, 45);
lblBack.setVisible(false);
lblBack.setToolTipText("Back");
lblCloseHover.setVisible(false);
lblCloseHover.setToolTipText("Close");
txtContent = new JTextArea();
txtContent.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
txtContent.setFont(new Font("Traditional Arabic", Font.BOLD, 15));
txtContent.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
txtContent.setLineWrap(true);
txtContent.setWrapStyleWord(true);
txtContent.setOpaque(false);
scroll = new JScrollPane(txtContent);
scroll.setOpaque(false);
scroll.getViewport().setOpaque(false);
scroll.setVisible(false);
lblBackground.add(scroll).setBounds(15, 57, 440, 470);
34

lblChooser = new JLabel(new ImageIcon(getClass().getResource("lblchooser.png")));
lblBackground.add(lblChooser).setBounds(275, 520, 230, 100);
MouseListener l = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
if (e.getSource() == lblCloseHover) {
System.exit(0);
} else if (e.getSource() == lblChooser) {
lblBackground.setIcon(new ImageIcon(getClass().getResource("BackroundImage.PNG")));
scroll.setVisible(true);
Random random = new Random();
int t = random.nextInt(filenames.length);
txtContent.setText(getContent(filenames[t]));
lblChooser.setVisible(false);
lblBack.setVisible(true);
// Fix the scroll area for the JTextArea
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
scroll.getVerticalScrollBar().setValue(0);
}
});
} else if (e.getSource() == lblBack) {
lblBackground.setIcon(new ImageIcon(getClass().getResource("Interface.PNG")));
scroll.setVisible(false);
lblBack.setVisible(false);
lblChooser.setVisible(true);
}
}
35

public void mouseEntered(MouseEvent e) {
if (e.getSource() == lblCloseImage) {
lblCloseHover.setVisible(true);
} else if (e.getSource() == lblBack) {
lblBack.setIcon(new ImageIcon(getClass().getResource("lblBackHover.PNG")));
}
}
public void mouseExited(MouseEvent e) {
if (e.getSource() == lblBack) {
lblBack.setIcon(new ImageIcon(getClass().getResource("lblBack.PNG")));
}
}
};
lblCloseImage.addMouseListener(l);
lblCloseImage.setCursor(new Cursor(Cursor.HAND_CURSOR));
lblCloseHover.addMouseListener(l);
lblCloseHover.setCursor(new Cursor(Cursor.HAND_CURSOR));
lblBack.addMouseListener(l);
lblBack.setCursor(new Cursor(Cursor.HAND_CURSOR));
lblChooser.addMouseListener(l);
lblChooser.setCursor(new Cursor(Cursor.HAND_CURSOR));
win.getContentPane().setBackground(Color.BLACK);
win.add(lblBackground).setBounds(5, 20, 470, 580);
win.setVisible(true);
}
36

private String getContent(Object filename) {
String output = "";
Scanner in = null;
String fn = filename.toString() + ".txt";
try {
in = new Scanner(new File(fn));
while (in.hasNext()) {
output += in.nextLine();
output += "n";
}
} catch (FileNotFoundException e) {
System.out.println(filename + ".txt does not exist !");
} finally {
in.close();
}
return output;
}
new OmensOfHafez();
}
}
37

Omens of Hafiz Output
38

Fal-e-Hafez (Omens of Hafez) Cards in Persian using Java

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Fal-e-Hafez (Omens of Hafez) Cards in Persian using Java