package inventory1;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.GridBagLayout;
import javax.swing.JTextField;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JLabel;
import javax.swing.JButton;
import com.toedter.calendar.JDateChooser;
import javax.swing.ImageIcon;
import java.awt.Font;
public class JFrame2 extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel contentPane;
private JTextField textField1;
private JLabel lblNewLabel2;
private JTextField textField2;
private JLabel lblNewLabel3;
private JTextField textField3;
private JLabel lblNewLabel4;
private JTextField textField4;
private JButton btnNewButton;
int j=0;
String[] informations = new String [5]; String a,b,c,d,t3;
private JLabel lblNewLabel5;
private JButton btnNewButton2;
private JDateChooser dateChooser;
//Yazıcı
public void yazıcı(String str) throws IOException {
File products = new File("database.xls");{
if (!products.exists()) {
products.createNewFile();
}
}
FileWriter prWriter = new FileWriter(products,true);
BufferedWriter bWriter = new BufferedWriter(prWriter);
//bWriter.write(str+"\n"); \n satır aşağı - \t sutun yana
bWriter.write(str+"\t");
j++;
if (j==informations.length) {
bWriter.write("\n");
System.out.println("Programın yazma görevi sonlandırıldı");
j=0;
bWriter.close();
}
bWriter.close();
}
void atayıcı() {
a=textField1.getText();
b=textField2.getText();
c=textField3.getText();
d=textField4.getText();
DateFormat t= new SimpleDateFormat("dd/MM/yyyy");
String selectedDate=t.format(dateChooser.getDate());
t3=selectedDate;
//t=t.format(dateChooser.getDate());
}
void clear() {
textField1.setText("");
textField2.setText("");
textField3.setText("");
textField4.setText("");
//dateChooser.setDate(java.util.Calendar.DATE);
//t3=t.format(dateChooser.getDate());
//System.out.println(t.format(t2)+" "+t+" "+t2+t3+" "+t.format(dateChooser.getDate()));
}
/**
* Launch the application.
*/
public static void main(String[] args) {
//JFrame2 obj = new JFrame2();
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
//tanımlamalar ve nesneler
/*File products = new File("database.xls");{
if (!products.exists()) {
products.createNewFile();
}
}
FileWriter prWriter = new FileWriter(products,false);
BufferedWriter bWriter = new BufferedWriter(prWriter);*/
//Frame
JFrame2 frame = new JFrame2();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public JFrame2() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(0, 0, 0, 0));
setContentPane(contentPane);
GridBagLayout gbl_contentPane = new GridBagLayout();
gbl_contentPane.columnWidths = new int[]{96, 99, 198, 0, 0};
gbl_contentPane.rowHeights = new int[]{20, 0, 18, 18, 0, 0, 0};
gbl_contentPane.columnWeights = new double[]{0.0, 0.0, 1.0, 0.0, Double.MIN_VALUE};
gbl_contentPane.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE};
contentPane.setLayout(gbl_contentPane);
JLabel lblNewLabel1 = new JLabel("\u00DCr\u00FCn Ad\u0131 :");
GridBagConstraints gbc_lblNewLabel1 = new GridBagConstraints();
gbc_lblNewLabel1.anchor = GridBagConstraints.EAST;
gbc_lblNewLabel1.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel1.gridx = 1;
gbc_lblNewLabel1.gridy = 0;
contentPane.add(lblNewLabel1, gbc_lblNewLabel1);
textField1 = new JTextField();
textField1.setText("\u00DCr\u00FCn Ad\u0131");
GridBagConstraints gbc_textField1 = new GridBagConstraints();
gbc_textField1.fill = GridBagConstraints.HORIZONTAL;
gbc_textField1.insets = new Insets(0, 0, 5, 5);
gbc_textField1.gridx = 2;
gbc_textField1.gridy = 0;
contentPane.add(textField1, gbc_textField1);
textField1.setColumns(25);
//Değer atama0
// informations [0]= textField1.getText();
lblNewLabel2 = new JLabel("Parti Numaras\u0131 :");
GridBagConstraints gbc_lblNewLabel2 = new GridBagConstraints();
gbc_lblNewLabel2.anchor = GridBagConstraints.EAST;
gbc_lblNewLabel2.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel2.gridx = 1;
gbc_lblNewLabel2.gridy = 1;
contentPane.add(lblNewLabel2, gbc_lblNewLabel2);
textField2 = new JTextField();
textField2.setText("Parti No");
GridBagConstraints gbc_textField2 = new GridBagConstraints();
gbc_textField2.fill = GridBagConstraints.HORIZONTAL;
gbc_textField2.insets = new Insets(0, 0, 5, 5);
gbc_textField2.gridx = 2;
gbc_textField2.gridy = 1;
contentPane.add(textField2, gbc_textField2);
textField2.setColumns(25);
//Değer atama1
// informations [1]= textField2.getText();
lblNewLabel3 = new JLabel("Son Kull. Tarihi :");
GridBagConstraints gbc_lblNewLabel3 = new GridBagConstraints();
gbc_lblNewLabel3.anchor = GridBagConstraints.EAST;
gbc_lblNewLabel3.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel3.gridx = 1;
gbc_lblNewLabel3.gridy = 2;
contentPane.add(lblNewLabel3, gbc_lblNewLabel3);
textField3 = new JTextField();
textField3.setText("Son Kullan\u0131m Tarihi");
GridBagConstraints gbc_textField3 = new GridBagConstraints();
gbc_textField3.fill = GridBagConstraints.HORIZONTAL;
gbc_textField3.insets = new Insets(0, 0, 5, 5);
gbc_textField3.gridx = 2;
gbc_textField3.gridy = 2;
contentPane.add(textField3, gbc_textField3);
textField3.setColumns(25);
//Değer atama2
// informations [2]= textField3.getText();
lblNewLabel4 = new JLabel("\u00DCretim Tarihi :");
GridBagConstraints gbc_lblNewLabel4 = new GridBagConstraints();
gbc_lblNewLabel4.anchor = GridBagConstraints.EAST;
gbc_lblNewLabel4.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel4.gridx = 1;
gbc_lblNewLabel4.gridy = 3;
contentPane.add(lblNewLabel4, gbc_lblNewLabel4);
textField4 = new JTextField();
textField4.setText("\u00DCretim Tarihi");
GridBagConstraints gbc_textField4 = new GridBagConstraints();
gbc_textField4.fill = GridBagConstraints.HORIZONTAL;
gbc_textField4.insets = new Insets(0, 0, 5, 5);
gbc_textField4.gridx = 2;
gbc_textField4.gridy = 3;
contentPane.add(textField4, gbc_textField4);
textField4.setColumns(25);
lblNewLabel5 = new JLabel("Tarih :");
GridBagConstraints gbc_lblNewLabel5 = new GridBagConstraints();
gbc_lblNewLabel5.anchor = GridBagConstraints.EAST;
gbc_lblNewLabel5.insets = new Insets(0, 0, 5, 5);
gbc_lblNewLabel5.gridx = 1;
gbc_lblNewLabel5.gridy = 4;
contentPane.add(lblNewLabel5, gbc_lblNewLabel5);
dateChooser = new JDateChooser();
Date date = new Date(); //Get Today Date
//dateChooser.setDate(t.format(date)); //Set Today Date to row
System.out.println(t3);
dateChooser.setDate(date);
dateChooser.setMinSelectableDate(date); //Set Min Day for Today
dateChooser.getCalendarButton().setFont(new Font("Segoe UI", Font.BOLD, 12));
dateChooser.getCalendarButton().setIcon(new ImageIcon(JFrame2.class.getResource("/com/toedter/calendar/demo/images/DemoTableColor16.gif")));
dateChooser.getCalendarButton().setText("Tarih");
GridBagConstraints gbc_dateChooser = new GridBagConstraints();
gbc_dateChooser.anchor = GridBagConstraints.NORTH;
gbc_dateChooser.insets = new Insets(0, 0, 5, 5);
gbc_dateChooser.fill = GridBagConstraints.HORIZONTAL;
gbc_dateChooser.gridx = 2;
gbc_dateChooser.gridy = 4;
contentPane.add(dateChooser, gbc_dateChooser);
//Değer atama3
// informations [3]= textField4.getText();
btnNewButton = new JButton("ONAYLA");
GridBagConstraints gbc_btnNewButton = new GridBagConstraints();
gbc_btnNewButton.insets = new Insets(0, 0, 0, 5);
gbc_btnNewButton.gridx = 2;
gbc_btnNewButton.gridy = 5;
contentPane.add(btnNewButton, gbc_btnNewButton);
btnNewButton.addActionListener(this); //this = ActionListener's object
btnNewButton2 = new JButton("Temizle");
GridBagConstraints gbc_btnNewButton2 = new GridBagConstraints();
gbc_btnNewButton2.anchor = GridBagConstraints.EAST;
gbc_btnNewButton2.insets = new Insets(0, 0, 5, 5);
gbc_btnNewButton2.gridx = 0;
gbc_btnNewButton2.gridy = 4;
contentPane.add(btnNewButton2, gbc_btnNewButton2);
btnNewButton2.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (e.getSource()==btnNewButton) {
int j=0;
//atayıcı();
atayıcı();
informations [0]=a;
informations [1]=b;
informations [2]=c;
informations [3]=d;
informations [4]=t3;
for (String i: informations) {
try {
j++;
System.out.println(j+". eklenen "+i);
yazıcı(i);
//textField1.setText(i);
/*informations [0]= textField1.setText(textField1.getText());
informations [1]= textField2.setText(textField2.getText());
informations [2]= textField3.getText(textField3.getText());
informations [3]= textField4.getText(textField4.getText());*/
//informations [j]=a;
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
textField1.setText("");
textField2.setText("");
textField3.setText("");
textField4.setText("");
System.out.println("başarılı");
}
if (e.getSource()==btnNewButton2) {
clear();
}
}
};
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Java is a very popular general-purpose programming language, it is class-based and object-oriented. Java was developed by James Gosling at Sun Microsystems ( later acquired by Oracle) the initial release of Java was in 1995. Java 17 is the latest long-term supported version (LTS). As of today, Java is the world's number one server programming language with a 12 million developer community, 5 million students studying worldwide and it's #1 choice for the cloud development.
short x = 999; // -32768 to 32767
int x = 99999; // -2147483648 to 2147483647
long x = 99999999999L; // -9223372036854775808 to 9223372036854775807
float x = 1.2;
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When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
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// code
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Example:
int i = 10;
if(i % 2 == 0) {
System.out.println("i is even number");
} else {
System.out.println("i is odd number");
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Switch is an alternative to If-Else-If ladder and to select one among many blocks of code.
switch(<conditional-expression>) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
//code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition. Usually for loop is preferred when number of iterations is known in advance.
for(Initialization; Condition; Increment/decrement){
//code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(<condition>){
// code
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Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
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} while (<condition>);
Class is the blueprint of an object, which is also referred as user-defined data type with variables and functions. Object is a basic unit in OOP, and is an instance of the class.
class keyword is required to create a class.
class Mobile {
public: // access specifier which specifies that accessibility of class members
string name; // string variable (attribute)
int price; // int variable (attribute)
};
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public class Greeting {
static void hello() {
System.out.println("Hello.. Happy learning!");
}
public static void main(String[] args) {
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Collection is a group of objects which can be represented as a single unit. Collections are introduced to bring a unified common interface to all the objects.
Collection Framework was introduced since JDK 1.2 which is used to represent and manage Collections and it contains:
This framework also defines map interfaces and several classes in addition to Collections.
| Collection | Description |
|---|---|
| Set | Set is a collection of elements which can not contain duplicate values. Set is implemented in HashSets, LinkedHashSets, TreeSet etc |
| List | List is a ordered collection of elements which can have duplicates. Lists are classified into ArrayList, LinkedList, Vectors |
| Queue | FIFO approach, while instantiating Queue interface you can either choose LinkedList or PriorityQueue. |
| Deque | Deque(Double Ended Queue) is used to add or remove elements from both the ends of the Queue(both head and tail) |
| Map | Map contains key-values pairs which don't have any duplicates. Map is implemented in HashMap, TreeMap etc. |