Sample Handling Program Textarea in Java

The following program examples demonstrate the Textarea input handling in java. This textarea input can be made with a JTextArea object. The program will display two text-area where most or all of the selected text in text-area first to be copied / moved to a second text-area.

Here is the display program:

 

Here is an example program


01 import java.awt .*;
02
03 import java.awt.event .*;
04
05 import javax.swing .*;
06
07 public class extends JFrame {TextAreaDemo
08
09 private JTextArea textArea1, textArea2;
10
11 private JButton btnCopy;
12
13 public TextAreaDemo () {
14
15 super ("Displays textarea");
16
17 Box box = Box.createHorizontalBox ();
18
19 String string = "This is just an example aja ya";
20
21 textArea1 = new JTextArea (string, 10, 15);
22
23 box.add (new JScrollPane (textArea1));
24
25 btnCopy = new JButton ("Copy >>");
26
27 box.add (btnCopy);
28
29 btnCopy.addActionListener (
30
31 new ActionListener () {
32
33 public void actionPerformed (ActionEvent e) {
34
35 textArea2.setText (textArea1.getSelectedText ());
36
37}
38
39}
40
41); / / end of addActionListener
42
43 textArea2 = new JTextArea (10.15);
44
45 textArea2.setEditable (false);
46
47 box.add (new JScrollPane (textArea2));
48
49 Container container = getContentPane ();
50
51 container.add (box);
52
53 setSize (425, 200);
54
55 setResizable (false);
56
57 setLocationRelativeTo (null);
58
59 setVisible (true);
60
61}
62
63 public static void main (String args []) {
64
65 JFrame.setDefaultLookAndFeelDecorated (true);
66
67 TextAreaDemo TextAreaDemo test = new ();
68
69 test.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
70
71}
72
73}

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Creating a Simple Slide in Java

Examples The following java program is a variation of the previous sample program list. Within this program, the list was made in order to be selected more than one option.

Here is the display program:

 

Here is an example program:


01 import java.awt .*;
02
03 import java.awt.event .*;
04
05 import javax.swing .*;
06
07 import javax.swing.event .*;
08
09 public class extends JFrame {SimpleSliderDemo
10
11 private JSlider slider;
12
13 private JTextField txtValue;
14
15 public SimpleSliderDemo () {
16
17 super ("JSlider Simple");
18
19 Container container = getContentPane ();
20
21 container.setLayout (new FlowLayout ());
22
23 txtValue = new JTextField (20);
24
25 txtValue.setBackground (Color.WHITE);
26
27 txtValue.setEditable (false);
28
29 slider = new JSlider (SwingConstants.HORIZONTAL, 0,100,50);
30
31 txtValue.setText (String.valueOf (slider.getValue ()));
32
Slider.setMinorTickSpacing 33 (5);
34
Slider.setMajorTickSpacing 35 (20);
36
37 slider.setPaintTicks (true);
38
39 slider.setLabelTable (slider.getLabelTable ());
40
41 slider.setPaintLabels (true);
42
43 slider.addChangeListener (
44
45 new ChangeListener () {
46
47 public void stateChanged (ChangeEvent e) {
48
49 txtValue.setText (String.valueOf (slider.getValue ()));
50
51}
52
53}
54
55);
56
57 container.add (txtValue);
58
59 container.add (slider);
60
61 setSize (280.200);
62
63 setVisible (true);
64
65}
66
67 public static void main (String args []) {
68
69 JFrame.setDefaultLookAndFeelDecorated (true);
70
71 SimpleSliderDemo SimpleSliderDemo test = new ();
72
73 test.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
74
75}
76
77}

Creating Menus in Java

Examples The following program demonstrates how to create a menu in java. Menus created with two main classes JMenu and JMenuItem.

Here is an example looks:

 

Berikut ini contoh program lengkapnya:

001	import java.awt.*;

002

003	import java.awt.event.*;

004

005	import javax.swing.*;

006

007	public class MenuTest extends JFrame {

008

009	private JMenuBar bar;

010

011	private JMenu mnuFile, mnuHelp, submnuNew;

012

013	private JMenuItem itemNew, itemOpen, itemExit, itemAbout, itemHelp,

014

015	subitemFile, subitemProject;

016

017	public MenuTest() {

018

019	super ("Membuat menu");

020

021	bar = new JMenuBar();

022

023	setJMenuBar (bar);

024

025	mnuFile = new JMenu ("File");

026

027	mnuFile.setMnemonic('F');

028

029	mnuHelp = new JMenu ("Help");

030

031	mnuHelp.setMnemonic('H');

032

033	submnuNew = new JMenu ("New");

034

035	submnuNew.setMnemonic('N');

036

037	mnuFile.add(submnuNew);

038

039	subitemFile = new JMenuItem ("File...");

040

041	subitemFile.setIcon(new ImageIcon("images/new.gif"));

042

043	subitemFile.setAccelerator(KeyStroke.getKeyStroke(

044

045	KeyEvent.VK_N, ActionEvent.CTRL_MASK));

046

047	subitemFile.addActionListener(

048

049	new ActionListener() {

050

051	public void actionPerformed(ActionEvent e) {

052

053	JOptionPane.showMessageDialog(null, "New File");

054

055

}

056

057

}

058

059

);

060

061	submnuNew.add(subitemFile);

062

063	subitemProject = new JMenuItem ("Project...");

064

065	subitemProject.setMnemonic ('P');

066

067	submnuNew.add(subitemProject);

068

069	itemOpen = new JMenuItem ("Open");

070

071	itemOpen.setMnemonic('O');

072

073	mnuFile.add(itemOpen);

074

075	mnuFile.addSeparator();

076

077	itemExit = new JMenuItem ("Exit");

078

079	itemExit.setMnemonic('E');

080

081	itemExit.addActionListener(

082

083	new ActionListener() {

084

085	public void actionPerformed(ActionEvent e) {

086

087	if (JOptionPane.showConfirmDialog(null,"Apakah Anda yakin akan keluar?",

088

089	"Konfirmasi",JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE)

090

091	== JOptionPane.OK_OPTION) {

092

093	System.exit(0);

094

095

}

096

097

}

098

099

}

100

101

);

102

103	mnuFile.add(itemExit);

104

105	itemHelp = new JMenuItem ("Help");

106

107	itemHelp.setIcon(new ImageIcon("images/help.gif"));

108

109	itemHelp.setMnemonic('e');

110

111	mnuHelp.add(itemHelp);

112

113	itemAbout = new JMenuItem ("About");

114

115	itemAbout.setMnemonic('A');

116

117	itemAbout.setIcon(new ImageIcon("images/info.gif"));

118

119	mnuHelp.add(itemAbout);

120

121	bar.add(mnuFile);

122

123	bar.add(mnuHelp);

124

125	setSize (400,200);

126

127	setLocationRelativeTo(null);

128

129	setVisible (true);

130

131

}

132

133	public static void main (String args[]) {

134

135	JFrame.setDefaultLookAndFeelDecorated(true);

136

137	MenuTest test = new MenuTest();

138

139	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

140

141

}

142

143

}

Creating a Popup Menu in Java

Popup menu is a menu that is displayed when you right-click in the window. The following program is an example of a program to make a popup menu in Java. Class that is used is the JPopupMenu.

Here is the display program:

 

Here's the source code program:
01 import java.awt .*;02 import java.awt.event .*;03 import javax.swing .*;0405 public class extends JFrame {PopupMenuTest06 private JRadioButtonMenuItem items [];ColorValues ​​07 private final Color [] = {Color.BLUE, Color.YELLOW, Color.red};08 private JPopupMenu popMenu;0910 public PopupMenuTest () {11 super ("Popup Menu");1213 ItemHandler ItemHandler handler = new ();14 colorNames String [] = {"Blue", "Yellow", "Red"};1516 ButtonGroup colorGroup = new ButtonGroup ();17 popMenu = new JPopupMenu ();18 items = new JRadioButtonMenuItem [colorValues.length];1920 for (int i = 0; i <items.length; i + +) {21 items [i] = new JRadioButtonMenuItem (colorNames [i]);22 popMenu.add (items [i]);23 colorGroup.add (items [i]);24 items [i]. AddActionListener (handler);25}2627 getContentPane (). SetBackground (Color.WHITE);2829 addMouseListener (30 new MouseAdapter () {31 public void mousePressed (MouseEvent e) {ShowPopupMenu 32 (e);33}3435 public void mouseReleased (MouseEvent e) {ShowPopupMenu 36 (e);37}3839 private void showPopupMenu (MouseEvent e) {40 if (e.isPopupTrigger ())41 popMenu.show (e.getComponent (), e.getX (), e.getY ());42}43} / / end of anonymous class44); / / end of addMouseListener4546 setSize (400.300);47 setLocationRelativeTo (null);48 setVisible (true);49}5051 public static void main (String args []) {52 JFrame.setDefaultLookAndFeelDecorated (true);53 PopupMenuTest PopupMenuTest test = new ();54 test.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);55}5657 private class implements ActionListener {ItemHandler58 public void actionPerformed (ActionEvent e) {59 / /60 for (int i = 0; i <items.length; i + +) {61 if (e.getSource () == items [i]) {62 getContentPane (). SetBackground (colorValues ​​[i]);63 return;64}65}66}67}68}
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Sample program in Java Internal Frame

Here's an example of a simple program to create InternalFrame in Java. Internal Frame is an internal frame (inside the main frame). With this capability, we can make a lot of windows (multi-window) in one frame. To make use JInternalFrame class.

Here is an example looks:

 


Here is an example program:

001 import java.awt .*;002003 import java.awt.event .*;004005 import javax.swing .*;006007 public class extends JFrame {InternalFrameDemo008009 private JDesktopPane deskPane;010011 private JMenuBar bar;012013 private JMenu mnuFile;014015 private JMenuItem itemNew, itemClose;016017 public InternalFrameDemo () {018019 super ("Creating the Internal Frame");020021 JDesktopPane deskPane = new ();022023 getContentPane (). Add (deskPane);024025 bar = new JMenuBar ();026027 mnuFile = new JMenu ("File");028029 mnuFile.setMnemonic ('F');030031 itemNew = new JMenuItem ("New");032033 itemNew.setMnemonic ('N');034035 itemNew.setAccelerator (KeyStroke.getKeyStroke (KeyEvent.VK_N, ActionEvent.CTRL_MASK));036037 itemNew.addActionListener (038039 new ActionListener () {040041 private int count = 0;042043 public void actionPerformed (ActionEvent e) {044045 String title = "Internal Frame" + (+ + number);046047 Color bg = new Color ((float) Math.random (), (float) Math.random (), (float) Math.random ());048049 JInternalFrame iframe = new JInternalFrame (title, true, true, true, true);050051 / / (title, resizable, closable, maximizable, iconizable)052053 / / remove the title bar of an iframe054055 ((javax.swing.plaf.basic.BasicInternalFrameUI) iframe.getUI ()). SetNorthPane (null);056Iframe.setSize 057 (200.150);058059 iframe.setBackground (bg);060061 deskPane.add (iframe);062063 iframe.setVisible (true);064065}066067}068069);070071 itemClose = new JMenuItem ("Close");072ItemClose.setMnemonic 073 ('C');074075 itemClose.addActionListener (076077 new ActionListener () {078079 public void actionPerformed (ActionEvent e) {080081 System.exit (0);082083}084085}086087);088089 mnuFile.add (itemNew);090091 mnuFile.add (itemClose);092093 bar.add (mnuFile);094SetJMenuBar 095 (bar);096SetSize 097 (500.400);098099 setLocationRelativeTo (null);100101 setVisible (true);102103}104105 public static void main (String args []) {106107 InternalFrameDemo InternalFrameDemo test = new ();108109 test.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);110111}112113}
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Tabbed Panel Example Program in Java

Examples The following program demonstrates how to make the panels in the form of Tab in java. JTabbedPane class is used.

The following looks:


 

Here is an example program:

01 import java.awt .*;
02 import java.awt.event .*;
03 import javax.swing .*;
04
05 public class extends JFrame {TabbedPaneDemo
06 private JTabbedPane tabPane;
07 private JLabel label1, label2, label3;
08 private JPanel Panel1, panel2, panel3;
09
10 public TabbedPaneDemo () {
11 super ("Tabbed Pane Demo");
12
13 tabPane = new JTabbedPane ();
14 label1 = new JLabel ("first panel", SwingConstants.CENTER);
15 Panel1 = new JPanel ();
16 panel1.add (label1);
17 tabPane.addTab (​​"First Tab", null, Panel1, "First Panel");
18
19 label2 = new JLabel ("second panel", SwingConstants.CENTER);
20 panel2 = new JPanel ();
21 panel2.setBackground (Color.ORANGE);
22 panel2.add (label2);
23 Icon icon = new ImageIcon ("images / new.gif");
24 tabPane.addTab (​​"Second Tab" icon, panel2, "Second Panel");
25
26 label3 = new JLabel ("third panel", SwingConstants.CENTER);
27 panel3 = new JPanel ();
28 panel3.setBackground (Color.YELLOW);
29 panel3.setLayout (new BorderLayout ());
30 panel3.add (new JButton ("North"), BorderLayout.NORTH);
31 panel3.add (new JButton ("West"), BorderLayout.WEST);
32 panel3.add (new JButton ("East"), BorderLayout.EAST);
33 panel3.add (new JButton ("South"), BorderLayout.SOUTH);
34 panel3.add (label3);
35 tabPane.addTab (​​"Tab Three", null, panel3, "Third Panel");
36
37 getContentPane (). Add (tabPane);
38
39 setSize (400.300);
40 setLocationRelativeTo (null);
41 setVisible (true);
42}
43
44 public static void main (String args []) {
45 TabbedPaneDemo TabbedPaneDemo test = new ();
46 test.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
47}
48}

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Sample Program Event Handling in Java

In the following example is added confirmation window when exit button is pressed.

The following looks:


 

Examples of programs:

01	import java.awt.*;

02

03	import java.awt.event.*;

04

05	import javax.swing.*;

06

07	public class ClickMe3 extends JFrame {

08

09	private JButton tombol, btnExit;

10

11	public ClickMe3() {

12

13	super ("Event Handling");

14

15	Container container = getContentPane();

16

17	container.setLayout(new FlowLayout());

18

19	ClickListener cl = new ClickListener ();

20

21	tombol = new JButton ("Click Me!");

22

23	tombol.addActionListener(cl);

24

25	container.add(tombol);

26

27	btnExit = new JButton ("Exit");

28

29	btnExit.addActionListener(cl);

30

31	container.add(btnExit);

32

33	setSize (200,100);

34

35	setVisible (true);

36

37

}

38

39	public static void main (String arg[]) {

40

41	ClickMe3 test = new ClickMe3();

42

43	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

44

45

}

46

47	//inner class

48

49	private class ClickListener implements ActionListener {

50

51	public void actionPerformed (ActionEvent e) {

52

53	if (e.getSource() == tombol) {

54

55	JOptionPane.showMessageDialog(null, "You click me again, guys !!!");

56

57	} else if (e.getSource() == btnExit){

58

59	if ( JOptionPane.showConfirmDialog(null, "Apakah Anda yakin akan keluar ?","Konfirmasi",

60

61	JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE) == JOptionPane.OK_OPTION) {

62

63	System.exit(0);

64

65

}

66

67

}

68

69

}

70

71

}

72

73

}

 

Program examples in Java KeyEvent

Here's an example Java program to demonstrate how the corresponding event handling button. The program will detect any keyboard key presses. Listener classes used are KeyListener which has 3 (three) keyTyped abstract method (), keyPressed () and keyReleased ().

The following looks:

 

01	import java.awt.*;

02	import java.awt.event.*;

03	import javax.swing.*;

04

05	public class KeyEventTest extends JFrame implements KeyListener {

06	private String baris1="", baris2="", baris3="";

07	private JTextArea textArea;

08

09	public KeyEventTest() {

10	super ("Mencoba Key Event");

11

12	textArea = new JTextArea (10,15);

13	textArea.setText("Tekan sembarang tombol di keyboard...");

14	textArea.setEnabled(false);

15	textArea.setDisabledTextColor(Color.BLACK);

16	getContentPane().add(textArea);

17

18	addKeyListener (this);

19

20	setSize (300,150);

21	setLocationRelativeTo(null);

22	setVisible(true);

23

}

24

25	public void keyPressed (KeyEvent e) {

26	baris1 = "Tombol yang ditekan : " + e.getKeyText(e.getKeyCode());

27	setLines2and3 (e);

28

}

29

30	public void keyReleased (KeyEvent e) {

31	baris1 = "Tombol yang dilepas : " + e.getKeyText(e.getKeyCode());

32	setLines2and3 (e);

33

}

34

35	public void keyTyped (KeyEvent e) {

36	baris1 = "Tombol yang ditulis : " + e.getKeyChar();

37	setLines2and3 (e);

38

}

39

40	private void setLines2and3 (KeyEvent e) {

41	baris2 = "This key is "+ (e.isActionKey() ? "" : "not ") + "an action key";

42	String temp = e.getKeyModifiersText(e.getModifiers());

43	baris3 = "Modifier key pressed : " + (temp.equals("") ? "none" : temp);

44	textArea.setText(baris1 + "\n" + baris2 + "\n" + baris3 + "\n");

45

}

46

47	public static void main (String args[]) {

48	KeyEventTest test = new KeyEventTest();

49	test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

50

}

51

}

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