I made a chatroom, server and client, in java.
Here is the code were my onlinelist messes up:
public void run() {
try {
while (true) {
String message = din.readUTF();
if (message.startsWith("CONNECTEDLISTEDWOOOOOOOOT")) {
ConnectedList con = new ConnectedList();
if (demanded == 1) {
con.ta.setText(message.substring(26));
con.setSize(200, 400);
con.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
con.setVisible(true);
demanded = 0;
} else {
con.ta.setText(message.substring(26));
}
} else {
ta.append(message+"\n");
if(!lol.isActive()) {
InputStream in = getClass().getResourceAsStream("bleep.wav");
AudioStream as = new AudioStream(in);
AudioPlayer.player.start(as);
}
}
}
} catch(IOException ie) { System.out.println(ie); }
}
this block of code works perfectly:
if (demanded == 1) {
con.ta.setText(message.substring(26));
con.setSize(200, 400);
con.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
con.setVisible(true);
demanded = 0;
}
It creates a new window using JFrame just with a textlabel(ta) with all connected users on it, also demanded just controls wether the frame is already opened or not.
Then the part were it gets messed up:
else {
con.ta.setText(message.substring(26));
}
Here it's just supposed to refresh the list by setting the text to the new list
but instead of doing that, it just wipes the window.
How can I fix it?
Before:
After:
well, I just found out the problem just putting:
ConnectedList con = new ConnectedList();
at the top by all other variables, and now it does work,
Related
I got the following code:
exch.setOnAction(e -> {
for (int i = 0; i < 10; i++) {
BrowserThread.driver.findElement(By.linkText("Premium Exchange")).click();
String strVal = BrowserThread.driver.findElement(By.id("premium_exchange_stock_wood")).getText();
String strVal2 = BrowserThread.driver.findElement(By.id("premium_points")).getText();
int intVal = Integer.parseInt(strVal);
int intVal2 = Integer.parseInt(strVal2);
if (intVal >= 64 && intVal2 >= 1) {
BrowserThread.driver.findElement(By.name("buy_wood")).clear();
BrowserThread.driver.findElement(By.name("buy_wood")).sendKeys("64"); //enter 64 in the 'buy box'
BrowserThread.driver.findElement(By.xpath("//input[#value='Calculate best offer ']")).click(); //click calculate best offer
BrowserThread.driver.findElement(By.xpath("//div[#id='premium_exchange']/div/div[2]/button")).click(); //click buy
try {
Thread.sleep(10000);
} catch (InterruptedException ex) {
Logger.getLogger(BrowserTab.class.getName()).log(Level.SEVERE, null, ex);
}
} else {
LogTab.log.appendText("Not enough premium points.\n");
}
if (stop.isPressed()) {
LogTab.log.appendText("Stopped task.\n");
break;
}
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
Logger.getLogger(MarketTab.class.getName()).log(Level.SEVERE, null, ex);
}
}
});
It basically refreshes a webpage infinitely when a button is pressed on the GUI.
There is a button to start the loop (exch), and a button to break the loop (stop). But my problem is, the GUI freezes when it executes tasks on the browser. This applies to everything, not just this for-loop.
For example, I have a run-button to open the selenium web browser. The GUI freezes until the web browser has loaded completely.
I checked around and found out I have to use threads, but I have no idea where to start. I tried making a separate class for the browser to run on a different thread, but that didn't work and I can't seem to find out what I did wrong.
BrowserThread class:
public class BrowserThread extends Thread {
static WebDriver driver;
private String baseUrl;
private String browsertype;
public BrowserThread(String name, String browsertype) {
super(name);
this.browsertype = browsertype;
}
// set up method to initialize driver object
public void setUp(String browsertype) throws Exception {
if (browsertype.contains("Chrome")) {
System.setProperty("webdriver.chrome.driver","res\\chromedriver.exe");
driver = new ChromeDriver();
} else if (browsertype.contains("PhantomJS")) {
driver = new PhantomJSDriver();
System.setProperty("phantomjs.binary.path", "res\\phantomjs.exe");
} else if (browsertype.contains("PhantomJS Linux")) {
driver = new PhantomJSDriver();
System.setProperty("phantomjs.binary.path", "res/phantomjs.exe");
}
baseUrl = "https://www.google.com/";
driver.get(baseUrl);
}
}
I am trying to make an application to scan documents from a scanner and i have found an application based on the mmscomputing free library that i found in github https://github.com/ashishkataria/browserWebScanning
It shows a panel from where you can choose a scanner from a list of available ones and scan the document.
public void getScan()
{
try
{
scanner.acquire();
}
catch (ScannerIOException e1)
{
IJ.showMessage("Access denied! \nTwain dialog maybe already opened!");
e1.printStackTrace();
}
}
public Image getImage()
{
Image image = imp.getImage();
return image;
}
public void update(ScannerIOMetadata.Type type, ScannerIOMetadata metadata) {
if (type.equals(ScannerIOMetadata.ACQUIRED))
{
if(imp!=null)
{
jContentPane.remove(ipanel);
jContentPane.remove(cpanel);
jContentPane.remove(crpdpanel);
}
imp = new ImagePlus("Scan", metadata.getImage());
im = imp.getImage();
imagePanel = new ImagePanel(im);
imagePanel.updateUI();
imagePanel.repaint();
imagePanel.revalidate();
ClipMover mover = new ClipMover(imagePanel);
imagePanel.addMouseListener(mover);
imagePanel.addMouseMotionListener(mover);
ipanel = imagePanel.getPanel();
ipanel.setBorder(new LineBorder(Color.blue,1));
ipanel.setBorder(BorderFactory.createTitledBorder("Scanned Image"));
ipanel.setBounds(0, 30,600, 600);
ipanel.repaint();
ipanel.revalidate();
ipanel.updateUI();
jContentPane.add(ipanel);
jContentPane.getRootPane().revalidate();
jContentPane.updateUI();
cpanel = imagePanel.getUIPanel();
cpanel.setBounds(700, 30,300, 150);
cpanel.repaint();
cpanel.setBorder(new LineBorder(Color.blue,1));
cpanel.setBorder(BorderFactory.createTitledBorder("Cropping Image"));
cpanel.setBackground(Color.white);
jContentPane.add(cpanel);
jContentPane.repaint();
jContentPane.revalidate();
metadata.setImage(null);
try {
new uk.co.mmscomputing.concurrent.Semaphore(0, true).tryAcquire(2000, null);
} catch (InterruptedException e) {
IJ.error(e.getMessage());
}
}
else if (type.equals(ScannerIOMetadata.NEGOTIATE)) {
ScannerDevice device = metadata.getDevice();
try {
device.setResolution(100);
} catch (ScannerIOException e) {
IJ.error(e.getMessage());
}
try{
device.setShowUserInterface(true);
device.setResolution(100); }catch(Exception e){
e.printStackTrace(); }
}
else if (type.equals(ScannerIOMetadata.STATECHANGE)) {
System.out.println("Scanner State "+metadata.getStateStr());
System.out.println("Scanner State "+metadata.getState());
if ((metadata.getLastState() == 3) && (metadata.getState() == 4)){}
} else if (type.equals(ScannerIOMetadata.EXCEPTION)) {
IJ.error(metadata.getException().toString());
}
}
I am trying to make it handle multiple documents and save in a pdf file, this library handles only 1 document right now.
i want to know how can i save the images in a buffer or something else and rescan until the user is done .
and is there a function that can save those images in a pdf file ?
public class Midlet extends MIDlet implements CommandListener{
Player p;
public void startApp() {
Display.getDisplay(this).setCurrent(new SongsList(this));
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
public void commandAction(Command cmnd, Displayable dsplbl) {
if (cmnd.getLabel().equals("Exit"))
{
destroyApp(true);
}
else
{
try {
//InputStream is = getClass().getResourceAsStream("/res/getlucky.mpeg");
//p = Manager.createPlayer(is, "audio/mpeg");
p = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
p.realize();
p.start();
} catch (IOException ex) {
ex.printStackTrace();
} catch (MediaException ex) {
ex.printStackTrace();
}
}
}
}
this is the songslist class :
public class SongsList extends List{
public SongsList(Midlet midlet)
{
super("Songs", List.IMPLICIT);
append("get lucky", null);
addCommand(new Command("Exit", Command.EXIT, 0));
addCommand(new Command("Select", Command.OK, 0));
setCommandListener(midlet);
}
}
tried use via file stored in project (its under src/res):
inputStream = getClass().getResourceAsStream("res/getlucky.mpg");
audioPlayer = Manager.createPlayer(inputStream, "audio/mpg");
as well as from HTTP:
//audioPlayer = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
Nothing works, what am I doing wrong?
EDIT:
I've tried to delete my application and just copy paste it to a new project and it worked for some reason.. now I encounter new problems:
1) I try to play a song - this is the link http://puu.sh/6n9jC.mp3
its not playing so I guess there's a limited file size for what can be played can someone tell me what is this limit ?
2) Im trying to record the audio with RecordPlayer but its always null
public AudioAnalyzer()
{
try {
thread = new Thread(this);
recordFinished = false;
//inputStream = getClass().getResourceAsStream("res/getlucky.mpg");
//audioPlayer = Manager.createPlayer(inputStream, "audio/mpg");
audioPlayer = Manager.createPlayer("http://puu.sh/35YTG.mp3");
//audioPlayer = Manager.createPlayer("http://puu.sh/6n9jC.mp3");
audioPlayer.realize();
System.out.println(System.getProperty("supports.audio.capture"));
recordControl = (RecordControl)audioPlayer.getControl("RecordControl");
recordOutput = new ByteArrayOutputStream();
recordControl.setRecordStream(recordOutput);
recordControl.startRecord();
audioPlayer.start();
//thread.start();
} catch (MediaException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
I even tried to print if the system is supporting audio capture and the result were true but I get NullPointException at this line :
recordOutput = new ByteArrayOutputStream();
although I tried to get the recordcontrol from the player it is still null :
recordControl = (RecordControl)audioPlayer.getControl("RecordControl");
I think I read that it'll always give NullPointerException unless you run it on a real device and not an emulator is that true ? can someone verify it ? and if so what can I do if I don't own a device currently any other way to use recordcontrol feature in emulator (assuming recordcontrol isn't working on emulators).
File size is 8MB (maybe play on your phone), try to this code
public void initMedia(final String aFileUrl) {
if (m_player == null) {
try {
m_player = Manager.createPlayer(aFileUrl);
m_player.addPlayerListener(this);
m_player.realize();
m_player.prefetch();
m_volumeControl = (VolumeControl) m_player.getControl("VolumeControl");
} catch (IOException ex) {
} catch (Exception ex) {
} catch (OutOfMemoryError e) {
}
}
}
In your code, i guess you miss "m_player.prefetch()", try this. And print your Exception message...
This code in general for file, resourcce, http...
public void initMedia(final String aProtocol, final String aMediaSource) {
if (m_player == null) {
try {
if (aMediaSource.indexOf("file://") == 0) {
InputStream iRecordStream = Connector.openInputStream(aMediaSource);
m_player = Manager.createPlayer(iRecordStream, "audio/amr");
} else {
m_player = Manager.createPlayer(aProtocol);
}
m_player.addPlayerListener(this);
m_player.realize();
boolean isPrefetch = true;
try {
m_player.prefetch();
} catch (Exception ex) {
isPrefetch = false;
}
// trick to pass prefetch error
if (!isPrefetch) {
if (m_player != null) {
m_player.close();
m_player = null;
}
if (aMediaSource.indexOf("file://") == 0) {
InputStream iRecordStream = Connector.openInputStream(aMediaSource);
m_player = Manager.createPlayer(iRecordStream, "audio/amr");
} else {
m_player = Manager.createPlayer(aProtocol);
}
m_player.addPlayerListener(this);
m_player.realize();
m_player.prefetch();
}
m_volumeControl = (VolumeControl) m_player.getControl("VolumeControl");
} catch (IOException ex) {
} catch (Exception ex) {
} catch (OutOfMemoryError e) {
}
}
}
In general when it comes to J2ME development, you should always test your app on multiple real devices.
Emulators can't be trusted.
Also, J2ME is very fragmented, and various devices have various bugs and behaves differently with the same code. This will affect any app on many areas. One area being audio playback.
For example, some devices requires that you use the realize() and prefetch() methods, while other devices will crash if you use prefetch(). The only possible solution (if you wish to support as many devices as possible) is to use multiple try/catch blocks.
See this link for a detailed explanation and other tips'n'tricks on audio playback with MIDP2.0
http://indiegamemusic.com/help.php?id=1
I have created an agent which accepts a value and then passes a message on to the next agent. I am having problem with entering a value and so my message is also not being transfered. Here is my Agent class, below. Does anyone know what I can do to fix it?
public class Prgm extends Agent {
int val;
protected void setup() {
Objects[] args = getArguments();
if (args!=null && args.length > 0)
val = Integer.parseInt((String) args[0]);
addBehaviour(new OneShotBehaviour(this) {
public void action() {
if (val == 1) {
ACLMessage msg = new ACLMessage(ACLMessage.INFORM);
msg.setLanguage("english");
msg.SetOntology("DG Status");
msg.SetContent("DG connected");
msg.addReceiver(new AID("r1", AID.ISLOCALNAME));
myAgent.send(msg);
} else {
ACLMessage msg = new ACLMessage(ACLMessage.INFORM);
msg.addReceiver(new AID("r1", AID.ISLOCALNAME));
msg.setLanguage("english");
msg.setOntology("DG Status");
msg.setContent("DG not connected");
send(msg);
}
}
});
}
If you don't need to use ontologies right away don't. For strings you can use:
ACLmessage.setContent("string message") and String stringmsg=ACLmessage.getContent()
If you need something more try Java serialization, it's way simpler than using ontologies.
Also I don't think this line is acceptable. new AID("r1", AID.ISLOCALNAME). One would typically contact the df (directory facilitator) agent querying available agents or services. Try something like this
DFAgentDescription template = new DFAgentDescription();
ServiceDescription sd= new ServiceDescription();
sd.setType(Service);
sd.setName(agentName);
template.addServices(sd);
try {
DFAgentDescription[] result = DFService.search(this, template);
listAgents.clear();
for(int i = 0; i<result.length;++i)
{
listAgents.addElement(result[i].getName());
}
//System.out.println(listAgents);
} catch (FIPAException e) {
// TODO Auto-generated catch block
e.printStackTrace();
log(this.getAID() +"!!error in requesting service ="+Service);
}
return (AID) listAgents.get(0);
I am new to Swing. I am trying to create a swing wrapper to allow the user to browse and select a folder, and that folder path is used as a command line parameter to a console .exe program. After they select the folder and click a "Launch Program" button, I want the swing window to display a message telling them that the program is processing (and display an animated gif of a clock), run the external program, then display another message when that program has finished execution. The problem I'm having is that the "Processing" message doesn't get displayed until after the external program finishes execution. In the code below, the onLaunchProgram method gets executed when the "Launch Program" button is clicked. I've tried revalidate() and repaint(), but there was no change. I have a waitFor() for the "Finished" message, but even when I take that out, the "Processing" message and gif don't get displayed until after the external program finishes execution.
...
JTextField txtFolder = new JTextField();
JLabel lblMessage = new JLabel();
JLabel lblPic = new JLabel();
JButton btnLaunchApplication = new JButton("Launch Program");
...
btnLaunchApplication.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
onLaunchProgram(evt);
}
});
...
if (returnVal == JFileChooser.APPROVE_OPTION){
file = fc.getSelectedFile();
txtFolder.setText(file.getAbsolutePath());
}
...
private void onLaunchProgram(ActionEvent evt) {
String strExecutableFilename = "MyExecutableProgam";
String strSourceFolder = txtFolder.getText();
String strCommand = strExecutableFilename + " " + strSourceFolder;
lblMessage.setText("Processing");
ImageIcon icon = new ImageIcon("clock.gif");
lblPic.setIcon(icon);
try {
Process procCommand = Runtime.getRuntime().exec(strCommand);
try {
procCommand.waitFor();
} catch (InterruptedException exception) {
exception.printStackTrace();
} finally {
}
lblMessage.setText("Finished");
} catch (IOException e) {
e.printStackTrace();
} finally {
}
}
It's difficult from your sample code to determine how you are executing the onLaunchProgram method, but from your description, it would be a safe beat to assume you are executing it within the context of the Event Dispatching Thread.
The Event Dispatching Thread is responsible for (amongst other things) dispatching repaint requests. Any thing that blocks this thread will prevent it from updating the UI.
Because procCommand.waitFor() is a blocking action, this will prevent any repaint request (or any events for that matter) from been processed until it returns.
You should execute all time consuming or blocking processes in a separate thread. The problem you have though, is all updates to the UI mast be executed within the context of the EDT (that is, you should never change/update/modify/create any UI component from any thread other then the EDT)
In Swing you have a number of options, in your case, I would suggest using a SwingWorker. It will allow you to execute the process in a background thread, but has some easy to use methods for resyncing updates to the UI.
public class ProcessWorker extends SwingWorker<Integer, String> {
private String program;
private String sourceFolder;
public ProcessWorker(String program, String sourceFolder) {
this.program = program;
this.sourceFolder = sourceFolder;
}
#Override
protected void process(List<String> chunks) {
// Back on the EDT
for (String value : chunks) {
if (value.equalsIgnoreCase("PROCESSING")) {
lblMessage.setText("Processing");
ImageIcon icon = new ImageIcon("clock.gif");
lblPic.setIcon(icon);
} else if (value.equalsIgnoreCase("FINISHED")) {
lblMessage.setText("Finished");
} else {
// Possible some other message...
}
}
}
#Override
protected Integer doInBackground() throws Exception {
int result = -1;
String strExecutableFilename = program;
String strSourceFolder = sourceFolder;
String strCommand = strExecutableFilename + " " + strSourceFolder;
publish("PROCESSING");
// lblMessage.setText("Processing");
// ImageIcon icon = new ImageIcon("clock.gif");
// lblPic.setIcon(icon);
try {
ProcessBuilder pb = new ProcessBuilder(program);
pb.redirectError();
pb.directory(new File(strSourceFolder));
Process procCommand = pb.start();
// Process procCommand = Runtime.getRuntime().exec(strCommand);
try {
result = procCommand.waitFor();
} catch (InterruptedException exception) {
exception.printStackTrace();
} finally {
}
// lblMessage.setText("Finished");
publish("FINISHED");
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}
You should also familiarise yourself with ProcessBuilder. It has a number of useful methods for building process and overcomes some of the difficulties people have when trying to get Runtime.getRuntime().exec to work.
You should take a look at http://docs.oracle.com/javase/tutorial/uiswing/concurrency/index.html for more details
It seems you're doing it all in one thread.
Use event dispatch thread to call your gui code.
private void onLaunchProgram(ActionEvent evt) {
String strExecutableFilename = "MyExecutableProgam";
String strSourceFolder = txtFolder.getText();
String strCommand = strExecutableFilename + " " + strSourceFolder;
ImageIcon icon = new ImageIcon("clock.gif");
javax.swing.SwingUtilities.invokeLater(
new Runnable() {
public void run() {
lblMessage.setText("Processing");
lblPic.setIcon(icon);
}
});
try {
Process procCommand = Runtime.getRuntime().exec(strCommand);
try {
procCommand.waitFor();
} catch (InterruptedException exception) {
exception.printStackTrace();
} finally {
}
javax.swing.SwingUtilities.invokeLater(
new Runnable() {
public void run() {
lblMessage.setText("Finished");
}
});
} catch (IOException e) {
e.printStackTrace();
} finally {
}
}