Develop Reference

Cannot find a image file that exists in java

I have written a function which takes in a BufferedImage and compares it to a pre-existing image in my hard drive checking if they are same or not.
public boolean checkIfSimilarImages(BufferedImage imgA, File B) {
DataBuffer imgAdata = imgA.getData().getDataBuffer();
int sizeA = imgAdata.getSize();
BufferedImage imgB = null;
try {
imgB = ImageIO.read(B);
} catch (IOException ex) {
Logger.getLogger(SupportClass.class.getName()).log(Level.SEVERE, null, ex);
}
DataBuffer imgBdata = imgB.getData().getDataBuffer();
int sizeB = imgBdata.getSize();
if(sizeA == sizeB) {
for(int i = 0; i < sizeA; i++) {
if (imgAdata.getElem(i) != imgBdata.getElem(i)) {
return false;
}
}
}
return true;
}
This throws IOException "Cant read input file". Idk why this is happening. I am calling the function like this...
while(support.checkIfSimilarImages(currentDisplay, new File(pathToOriginalImage)) == false) {
System.out.println("Executing while-loop!");
bot.delay(3000);
currentDisplay = bot.createScreenCapture(captureArea);
}
where,
String pathToOriginalImage = "‪‪‪‪C:\\Users\\Chandrachur\\Desktop\\Home.jpg";
I can see that the path is valid. But as I am testing it for File.exists() or File.canRead() or File.absoluteFile().exists() inside the checkIfSimilarImages function and everything is returning false.
I have researched my question here and tried out these suggestions:
It is not only for this location, I have tried a variety of other locations but in vain. Also it is not a problem where I have hidden file extensions and the actual file might be Home.jpg.jpg .
The only thing that might be is that permissions might be different. I dont really know how to verify this, but there is no reason it should have some permission which is not readable by java. It is just another normal jpg file.
Can it be because I am passing the file object reference into a function so in this process somehow the reference is getting modified or something. I just dont know. I am running out of possibilities to test for...
The whole stack trace is as follows:
javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(ImageIO.java:1301)
at battlesbot.SupportClass.checkIfSimilarImages(SupportClass.java:77)
at battlesbot.AutomatedActions.reachHomeScreen(AutomatedActions.java:72)
at battlesbot.BattlesBot.main(BattlesBot.java:22)
Exception in thread "main" java.lang.NullPointerException
at battlesbot.SupportClass.checkIfSimilarImages(SupportClass.java:81)
at battlesbot.AutomatedActions.reachHomeScreen(AutomatedActions.java:72)
at battlesbot.BattlesBot.main(BattlesBot.java:22)
C:\Users\Chandrachur\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 11 seconds)
I am on Windows 10, IDE is NetBeans.
UPDATE:
Huge thanks to #k5_ . He told me to paste this in path and it worked.
"C:/Users/Chandrachur/Desktop/Home.jpg";
It seems some invisible characters were in the path. But I still don't understand what that means.

Usually this kind of problem lies with access problem or typos in the filename.
In this case there were some invisible unicode characters x202A in the filename. The windows dialog box, the file path was copied from, uses them for direction of writing (left to right).
One way of displaying them would be this loop, it has 4 invisible characters at the start of the String. You would also see them in a debugger.
String x = "‪‪‪‪C:\\Users\\Chandrachur\\Desktop\\Home.jpg";
for(char c : x.toCharArray()) {
System.out.println( c + " " + (int) c);
}

Netbeans module development - How to modify opened file

I am writing my own Netbeans plugin to edit opened files. I have managed to get some information about currently active file using
TopComponent activeTC = TopComponent.getRegistry().getActivated();
FileObject fo = activeTC.getLookup().lookup(FileObject.class);
io.getOut().println(fo.getNameExt());
io.getOut().println(fo.canWrite());
io.getOut().println(fo.asText());
But I have no idea how to modify this file. Can someone help me with this?
And second question, how to get text selection ranges? I want to run my command only on selected text.

For modifying the file you could use the NetBeans org.openide.filesystems.FileUtil.toFile() and then the regular Java stuff to read and write files and for getting the selected text of the current editor window you would have to do something like:
Node[] arr = activeTC.getActivatedNodes();
for (int j = 0; j < arr.length; j++) {
EditorCookie ec = (EditorCookie) arr[j].getCookie(EditorCookie.class);
if (ec != null) {
JEditorPane[] panes = ec.getOpenedPanes();
if (panes != null) {
// USE panes
}
}
}
For more code examples see also here

After several hours of research I found out that:
The code I posted in Question can be used to obtain basic information about active file.
To get caret position or get selection range you can do:
JTextComponent editor = EditorRegistry.lastFocusedComponent();
io.getOut().println("Caret pos: "+ editor.getCaretPosition());
io.getOut().println("Selection start: "+ editor.getSelectionStart());
io.getOut().println("Selection end: "+ editor.getSelectionEnd());
To modify content of active file (in a way that the modification can be undo by Ctrl+z) you may use this code:
final StyledDocument doc = context.openDocument();
NbDocument.runAtomicAsUser(doc, new Runnable() {
public void run() {
try {
doc.insertString(ofset, "New text.", SimpleAttributeSet.EMPTY);
} catch (Exception e) {
}
}
});

PlaceHolderAPI not working

As part of my plugin i have a clear chat command and at the end of the blank messages there is an option to display text. My problem is that the PlaceHolderAPI isn't working as it should.
Command Code:
if (label.equalsIgnoreCase("clearchat") || label.equalsIgnoreCase("mcc")) {
if (p.hasPermission("mystic.chat.admin.clearchat")) {
for (int i = 0; i < getConfig().getInt("clearChat.blankLines"); i++) {
Bukkit.broadcastMessage(" ");
}
for (String s : getConfig().getStringList("clearChat.endMessage")) {
s = PlaceholderAPI.setPlaceholders(p, s);
// This is here to check if the PlaceHolderAPI even knows there is place holders in it
p.sendMessage(String.valueOf(PlaceholderAPI.containsPlaceholders(s)));
Bukkit.broadcastMessage(ChatColor.translateAlternateColorCodes('&', s));
}
return true;
} else {
p.sendMessage(ChatColor.RED + "You are lacking the required permission node!");
return true;
}
}
Config File section:
clearChat:
blankLines: 256
endMessage:
- '&bChat was cleared by %player_name%'
When i run the command "/mcc" or "/clearchat" it always says false (for not recognizing any placeholders) and none of the place holders are replaced.
I do have the API correctly in the build path, and the command words perfectly, other than the place holders not converting.
I feel as if im making a stupid mistake, or that im doing this the complete wrong way...

You shouldn't need to use another api using p.getName() should suffice then using String.replace to replace the %name%

You are using the API wrong
You did this
s = PlaceholderAPI.setPlaceholders(p, s);
If the API would throw an error if there are no placeholders just surround that line with a try{} catch (Exception e) then send it to the player
p.sendMessage(s);
There is no need for the String.valueOf(s) as the API [is expected to] return a String, anyways setting the String s = PlaceholderAPI.setPlaceholders(p, s); will cast whatever object is there to a string.

How to edit a microsoft window spacing from a java application?

i'm trying to implement steganography's word shifting coding protocol on a microsoft word report using java application. Basicly, it uses an existing report and edit it's spacing to put some secret data. If it's wider, then its 1 bit data. And if it's narrower, then it's 0 bit data. So i wonder what kind of library should i have to start constructing this java app or if java doesn't support this kind of comunication with ms-word what kind language of programming should i use, thank you for your time.

I would recommend using C# and the Microsoft.Office.Interop.Word. You can use the free Visual Studio Community version (https://www.visualstudio.com/products/visual-studio-community-vs), create a console application and add a reference for the interop namespace (in project explorer, right click on references, add reference: COM->Microsoft Word 16.0 Object Library).
Simple example:
namespace WordShiftingExample
{
class Program
{
private static int[] getSpaces(string text)
{
System.Collections.ArrayList list = new System.Collections.ArrayList();
int index = 0;
while (index != text.LastIndexOf(" "))
{
index = text.IndexOf(" ", index + 1);
list.Add(index);
}
return list.ToArray(typeof(int)) as int[];
}
static void Main(string[] args)
{
try
{
Microsoft.Office.Interop.Word.Application winword = new Microsoft.Office.Interop.Word.Application();
winword.ShowAnimation = false;
winword.Visible = false;
object missing = System.Reflection.Missing.Value;
Microsoft.Office.Interop.Word.Document document = winword.Documents.Add(ref missing, ref missing, ref missing, ref missing);
float zero = 0.1F;
float one = 0.15F;
document.Content.Text = "This is a test document.";
//set word-spacing for first two spaces
int[] spaces = getSpaces(document.Content.Text);
document.Range(spaces[0], spaces[0]+1).Font.Spacing=zero;
document.Range(spaces[1], spaces[1]+1).Font.Spacing = one;
//read word-spacing for first two spaces
System.Diagnostics.Debug.WriteLine(document.Range(spaces[0], spaces[0]+1).Font.Spacing); // prints 0.1
System.Diagnostics.Debug.WriteLine(document.Range(spaces[1], spaces[1]+1).Font.Spacing); // prints 0.15
//Save the document
object filename = System.Environment.GetEnvironmentVariable("USERPROFILE")+"\\temp1.docx";
document.SaveAs2(ref filename);
document.Close(ref missing, ref missing, ref missing);
document = null;
winword.Quit(ref missing, ref missing, ref missing);
winword = null;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.StackTrace);
}
}
}
}

Android: Parsing XML DOM parser. Converting childnodes to string

Again a question. This time I'm parsing XML messages I receive from a server.
Someone thought to be smart and decided to place HTML pages in a XML message. Now I'm kind of facing problems because I want to extract that HTML page as a string from this XML message.
Ok this is the XML message I'm parsing:
<AmigoRequest>
<From></From>
<To></To>
<MessageType>showMessage</MessageType>
<Param0>general message</Param0>
<Param1><html><head>test</head><body>Testhtml</body></html></Param1>
</AmigoRequest>
You see that in Param1 a HTML page is specified. I've tried to extract the message the following way:
public String getParam1(Document d) {
if (d.getDocumentElement().getTagName().equals("AmigoRequest")) {
NodeList results = d.getElementsByTagName("Param1");
// Messagetype depends on what message we are reading.
if (results.getLength() > 0 && results != null) {
return results.item(0).getFirstChild().getNodeValue();
}
}
return "";
}
Where d is the XML message in document form.
It always returns me a null value, because getNodeValue() returns null.
When i try results.item(0).getFirstChild().hasChildNodes() it will return true because he sees there is a tag in the message.
How can i extract the html message <html><head>test</head><body>Testhtml</body></html> from Param0 in a string?
I'm using Android sdk 1.5 (well almost java) and a DOM Parser.
Thanks for your time and replies.
Antek

You could take the content of param1, like this:
public String getParam1(Document d) {
if (d.getDocumentElement().getTagName().equals("AmigoRequest")) {
NodeList results = d.getElementsByTagName("Param1");
// Messagetype depends on what message we are reading.
if (results.getLength() > 0 && results != null) {
// String extractHTMLTags(String s) is a function that you have
// to implement in a way that will extract all the HTML tags inside a string.
return extractHTMLTags(results.item(0).getTextContent());
}
}
return "";
}
All you have to do is to implement a function:
String extractHTMLTags(String s)
that will remove all HTML tag occurrences from a string.
For that you can take a look at this post: Remove HTML tags from a String

after checking a lot and scratching my head thousands of times I came up with simple alteration that it needs to change your API level to 8

EDIT: I just saw your comment above about getTextContent() not being supported on Android. I'm going to leave this answer up in case it's useful to someone who's on a different platform.
If your DOM API supports it, you can call getTextContent(), as follows:
public String getParam1(Document d) {
if (d.getDocumentElement().getTagName().equals("AmigoRequest")) {
NodeList results = d.getElementsByTagName("Param1");
// Messagetype depends on what message we are reading.
if (results != null) {
return results.getTextContent();
}
}
return "";
}
However, getTextContent() is a DOM Level 3 API call; not all parsers are guaranteed to support it. Xerces-J does.
By the way, in your original example, your check for null is in the wrong place; it should be:
if (results != null && results.getLength() > 0) {
Otherwise, you'd get a NPE if results really does come back as null.

Since getTextContent() isn't available to you, another option would be to write it -- it isn't hard. In fact, if you're writing this solely for your own use -- or your employer doesn't have overly strict rules about open source -- you could look at Apache's implementation as a starting point; lines 610-646 seem to contain most of what you need. (Please be respectful of Apache's copyright and license.)
Otherwise, some rough pseudocode for the method would be:
String getTextContent(Node node) {
if (node has no children)
return "";
if (node has 1 child)
return getTextContent(node.getFirstChild());
return getTextContent(new StringBuffer()).toString();
}
StringBuffer getTextContent(Node node, StringBuffer sb) {
for each child of node {
if (child is a text node) sb.append(child's text)
else getTextContent(child, sb);
}
return sb;
}

Well i was almost there with the code...
public String getParam1(Document d) {
if (d.getDocumentElement().getTagName().equals("AmigoRequest")) {
NodeList results = d.getElementsByTagName("Param1");
// Messagetype depends on what message we are reading.
if (results.getLength() > 0 && results != null) {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db;
Element node = (Element) results.item(0); // get the value of Param1
Document doc2 = null;
try {
db = dbf.newDocumentBuilder();
doc2 = db.newDocument(); //create new document
doc2.appendChild(doc2.importNode(node, true)); //import the <html>...</html> result in doc2
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
Log.d(TAG, " Exception ", e);
} catch (DOMException e) {
// TODO: handle exception
Log.d(TAG, " Exception ", e);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace(); }
return doc2. .....// All I'm missing is something to convert a Document to a string.
}
}
return "";
}
Like explained in the comment of my code. All I am missing is to make a String out of a Document. You can't use the Transform class in Android... doc2.toString() will give you a serialization of the object..
But my next step is write my own parser if this doesnt work out ;)
Not the best code but a temponary solution.
public String getParam1(String b) {
return b
.substring(b.indexOf("<Param1>") + "<Param1>".length(), b.indexOf("</Param1>"));
}
Where String b is the XML document string.