I have the following piece of code,It just opens a JTextPane in a Jframe..
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.text.DefaultCaret;
public class TextPane extends JFrame{
public static TextPane instance;
private static JTextPane pane = new JTextPane();
private static JScrollPane scroll = new JScrollPane();
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
TextPane.getInstance().init();
}
});
}
private static TextPane getInstance() {
if(null == instance){
instance = new TextPane();
}
return instance;
}
private void init() {
pane.setFont(new Font("Courier new", Font.PLAIN, 12));
pane.setLayout(new BorderLayout());
pane.setBackground(Color.black);
pane.setForeground(Color.white);
pane.setCaretColor(Color.green);
pane.setDragEnabled(false);
DefaultCaret caret = (DefaultCaret) pane.getCaret();
caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
scroll.setViewportView(pane);
add(scroll);
setTitle("Dummy");
setSize(500 , 500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setResizable(true);
setVisible(true);
}
}
To analyze memory used by application i ran this code and once the GUI comes i verified Memory(Private working set) in Task manager ,(By right click on this application in Task manager Application tab and Go to Process).
For simply opening the GUI it showed around 16000K . is it normal?? If not how can i check the actual memory usage, which we can say this is the memory used by this application(For opening GUI).
Please help.
Related
I am quite new to Java GUI, and I have a question about JScrollPane:
Why does my scroll_pane not show up?
package good_Package;
public class Class_Operation
{
public static void main(String[] args)
{
Class_Frame frame = new Class_Frame();
frame.setVisible(true);
}//END MAIN
}//END CLASS
And the frame class is below.
package good_Package;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class Class_Frame extends JFrame
{
JTextArea text_area;
JScrollPane scroll_pane;
public Class_Frame()
{
//Basics
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("This is a title.");
getContentPane().setPreferredSize(new Dimension(500, 500));
pack();
setResizable(false);
setLayout(null);//This is a null Layout
getContentPane().setBackground(Color.GREEN);//frame has a different color from the scroll_pane
//END Basics
text_area = new JTextArea(20, 20);
scroll_pane = new JScrollPane(text_area);
scroll_pane.setBackground(Color.CYAN);//scroll_pane has a different color from the frame
scroll_pane.setVisible(true);
getContentPane().add(scroll_pane);
}//END CONSTRUCTOR
}//END CLASS
Thank you for all suitable answers come from the future.
If I have a JLabel with <u> tag, such as <html><u>text</u>, with WindowsLookAndFeel and WindowsClassicLookAndFeel the underline is not rendered. I have reported this bug.
If no Look and Feel is set, or with Nimbus, all correct.
I know I can set the font attributes of the JLabel, but what if I only want to render one part of the text?
EDIT: I have tested and found that it is a bug of MigLayout combined with UIManger font setting.
Try the code: comment out anyone of UIManager.put("Label.font") or setLayout(MigLayout(xxx)) will solve the problem, but if they are both present, the line is not shown. I changed the title of question to describe it better. Now I see it has nothing to do with L&F, because Nimbus neither render the line.
The effect is:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel;
import com.sun.java.swing.plaf.windows.WindowsLookAndFeel;
import net.miginfocom.swing.MigLayout;
public class WindowsLFUnderline extends JDialog {
public WindowsLFUnderline() {
begin();
}
private void begin() {
try {
UIManager.setLookAndFeel(new WindowsClassicLookAndFeel());
//UIManager.setLookAndFeel(new WindowsLookAndFeel());
UIManager.put("Label.font", new Font("SimSun", Font.PLAIN, 13));
} catch (UnsupportedLookAndFeelException e) {
e.printStackTrace();
}
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setLayout(new BorderLayout());
JTabbedPane tabs = new JTabbedPane();
JLayeredPane layer = new JLayeredPane();
layer.setLayout(new MigLayout("insets 5, fill", "[]", "[]"));
// layer.setLayout(new BorderLayout());
JLabel test = new JLabel("<html><u>TEST</u>");
test.setForeground(Color.BLUE);
test.setBounds(0, 0, 300, 150);
layer.add(test, BorderLayout.CENTER);
tabs.addTab("tab1", layer);
add(tabs, BorderLayout.CENTER);
pack();
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
WindowsLFUnderline frame = new WindowsLFUnderline();
}
});
}
}
I'm currently working on a project that requires the state of a JRadioButton to change when the record being viewed is updated.
We've had a few clients complain to us that when the record changes, if the JRadioButton is off-screen, it won't be updated until the screen is shown. This behavior seems to be a result of using the Windows Look and Feel, as it doesn't seem to happen when it is not set.
The code example below demonstrates this.
The default selected JRadioButton is 'Cat', so by selecting the 'Dog' JButton and then changing tab to 'Question', you can see the JRadioButton transition occur.
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
/**
* Example of JRadioButton not updating until it's parent panel becomes visible.
*/
public class RadioButtonExample extends JPanel implements ActionListener {
public static final String CAT = "Cat";
public static final String DOG = "Dog";
private final JRadioButton radCat;
private final JRadioButton radDog;
private final ButtonGroup grpAnimal;
public RadioButtonExample() {
super(new BorderLayout());
JLabel lblQuestion = new JLabel("Are you a cat or dog person?");
radCat = new JRadioButton(CAT);
radCat.setActionCommand(CAT);
radCat.setSelected(true);
radDog = new JRadioButton(DOG);
radDog.setActionCommand(DOG);
grpAnimal = new ButtonGroup();
grpAnimal.add(radCat);
grpAnimal.add(radDog);
JPanel pnlQuestion = new JPanel(new GridLayout(0, 1));
pnlQuestion.add(lblQuestion);
pnlQuestion.add(radCat);
pnlQuestion.add(radDog);
JButton btnSetCat = new JButton(CAT);
btnSetCat.setActionCommand(CAT);
btnSetCat.addActionListener(this);
JButton btnSetDog = new JButton(DOG);
btnSetDog.setActionCommand(DOG);
btnSetDog.addActionListener(this);
JPanel pnlButtons = new JPanel(new GridLayout(0, 1));
pnlButtons.add(new JLabel("Update your choice of animal"));
pnlButtons.add(btnSetCat);
pnlButtons.add(btnSetDog);
JTabbedPane tabPane = new JTabbedPane();
tabPane.addTab("Buttons", pnlButtons);
tabPane.addTab("Question", pnlQuestion);
add(tabPane, BorderLayout.LINE_START);
setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
}
public void actionPerformed(ActionEvent evt) {
SwingUtilities.invokeLater(new Runnable(){
public void run() {
grpAnimal.clearSelection();
if (CAT.equals(evt.getActionCommand())) {
grpAnimal.setSelected(radCat.getModel(), true);
}
else if (DOG.equals(evt.getActionCommand())) {
grpAnimal.setSelected(radDog.getModel(), true);
}
}
});
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("RadioButtonExample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new RadioButtonExample();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
// Comment out the line below to run using standard L&F
setLookAndFeel();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
private static void setLookAndFeel() {
try {
// Set Windows L&F
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
}
catch (Exception e) {
// handle exception
}
}
}
Is there a way to prevent this behavior or even speed it up to make it less noticeable for our users?
You might be able to disable the animation by specifying the swing.disablevistaanimation Java system property:
java -Dswing.disablevistaanimation="true" your-cool-application.jar
In the com.sun.java.swing.plaf.windows.AnimationController class, there is a VISTA_ANIMATION_DISABLED field that is initialized to the swing.disablevistaanimation property. This field determines whether the paintSkin method calls the skin.paintSkinRaw method if animations are disabled or else starts to get into the animations.
It works on my Windows 8.1 laptop with Java 8 (jdk1.8.0_65), so its effect does not seem to be limited to Windows Vista only.
I want to implement full screen exclusive mode in my already made program, my main class is freeTTS.java which is:
package freetts;
public class FreeTTS {
public static void main(String[] args) {
new FormTTS().setVisible(true);
}
}
The other code of the whole program is in FormTTS.java which is a subclass of JFrame.
I tried to put the code to make it full screen in here but it gave all sorts of different errors, Do I have to put the code in FreeTTS or FormTTS?
Here is my file struct: (Note: FormTTS is another java file)
See i want to remove the pinkish whole border:
From your last question, The answer may have been incompatible with the netbeans GUI builder formatting and with your program design, So here is an example that may be more compatible. Try it out and see what happens.
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class FormTTS extends JFrame {
private boolean isFullScreen = false;
private JButton button;
public FormTTS() {
initComponents();
initFullScreen();
}
private void initComponents() {
setLayout(new GridBagLayout());
button = new JButton(
"I'm a smallbutton in a Huge Frame, what the heck?!");
add(button);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
}
private void initFullScreen() {
GraphicsEnvironment env = GraphicsEnvironment
.getLocalGraphicsEnvironment();
GraphicsDevice device = env.getDefaultScreenDevice();
isFullScreen = device.isFullScreenSupported();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setUndecorated(isFullScreen);
setResizable(!isFullScreen);
if (isFullScreen) {
// Full-screen mode
device.setFullScreenWindow(this);
validate();
} else {
// Windowed mode
this.pack();
this.setExtendedState(MAXIMIZED_BOTH);
this.setVisible(true);
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new FormTTS().setVisible(true);
}
});
}
}
You should just be able to do the following, although I recommend having a read of the official guide on fullscreen exclusive mode.
FormTTS ftts = new FormTTS();
GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
gd.setFullScreenWindow(ftts);
ftts.setUndecorated(true);
ftts.setVisible(true);
I have created a simple VLCJ project that consists of a simple embedded player and a button to exit.
The code is as follows:
package test;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import uk.co.caprica.vlcj.binding.LibVlc;
import uk.co.caprica.vlcj.component.EmbeddedMediaPlayerComponent;
import uk.co.caprica.vlcj.runtime.RuntimeUtil;
import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
public class Demo {
private final JFrame frame;
private final EmbeddedMediaPlayerComponent mediaPlayerComponent;
private JPanel videoPane;
private JPanel buttonPane;
private Button exitButton;
private ActionListener a;
private static String vlc_location = "C:\\Program Files\\VideoLAN\\VLC";
public static void main(String[] args) {
NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), vlc_location);
Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new Demo().run();
}
});
}
public Demo() {
mediaPlayerComponent = new EmbeddedMediaPlayerComponent();
a = new MyActionListener();
exitButton = new Button("Exit");
exitButton.setActionCommand("Exit app");
exitButton.addActionListener(a);
buttonPane = new JPanel();
buttonPane.setLayout(new BorderLayout());
buttonPane.setBackground(Color.black);
buttonPane.add(exitButton, BorderLayout.CENTER);
videoPane = new JPanel();
videoPane.setLayout(new BorderLayout());
videoPane.setBackground(Color.black);
videoPane.add(mediaPlayerComponent, BorderLayout.CENTER);
videoPane.add(buttonPane, BorderLayout.PAGE_END);
frame = new JFrame("vlcj demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocation(100, 100);
frame.setSize(1200, 800);
frame.setContentPane(videoPane);
frame.setVisible(true);
}
public void run() {
mediaPlayerComponent.getMediaPlayer().playMedia(video_file);
}
class MyActionListener implements ActionListener {
#Override
public void actionPerformed(ActionEvent arg0) {
String s = arg0.getActionCommand();
if (s.equals("Exit")) {
System.exit(0);
}
}
}
}
The problem is that the button does show up but it cannot be clicked. When i removed the videoPane, it was back to clickable! Any ideas if I'm missing something?
I am using the version 2.1.0 for vlcj.
Thanks!
Thanks MadProgrammer for your advise. I went on to think about it and tried commenting away the line of code in run(). The JButton came back!
However, when i un-commented the code in run(), the JButton disappeared. I was thinking maybe the Swing runnable was causing issue with the creation of the JButton.
Hence, what i did was to comment away the whole Swing runnable and just use:
final Demo demo = new Demo();
demo.run();
The demo can now play video and display the Exit button, thanks!