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JavaFX application: printer cannot print file

I am creating a PDF document in tDEST by itext library. Then I am cleaning trailing spaces in resize functions writing a new document to DEST. If I want to print tDest document, it works fine but if I try to print a DEST file, it does not print anything and does not throw any exception.
Here is my main class:
String DEST = System.getProperty("user.home") + "\\Documents\\invoice.pdf";
String tDEST = System.getProperty("user.home") + "\\Documents\\temp.pdf";
public static void main(String... args) {
....
resize();
PDDocument document = null;
try {
document = PDDocument.load(new File(DEST));
} catch (IOException e) {
e.printStackTrace();
}
PrinterJob job = PrinterJob.getPrinterJob();
job.setPageable(new PDFPageable(document));
try {
PrintService myPrintService = findPrintService(Commons.printer.getName());
job.setPrintService(myPrintService);
job.print();
} catch (Exception e) {
e.printStackTrace();
System.out.println("Printer ishlamayapti");
}
....
}
public void resize() {
try {
FileOutputStream fileOutputStream = new FileOutputStream(DEST);
PdfReader reader = new PdfReader(tDEST);
com.itextpdf.text.Rectangle pageSize = reader.getPageSize(1);
PdfStamper stamper = new PdfStamper(reader, fileOutputStream);
PdfReaderContentParser parser = new PdfReaderContentParser(reader);
TextMarginFinder finder = parser.processContent(1, new TextMarginFinder());
PdfDictionary page = reader.getPageN(1);
page.put(PdfName.CROPBOX, new PdfArray(new float[]{pageSize.getLeft(), finder.getLly(), pageSize.getRight(), pageSize.getTop()}));
stamper.markUsed(page);
stamper.flush();
stamper.close();
reader.close();
fileOutputStream.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}

How can i edit pdf and put it inside zip during stream then download using IText and java?

My use case is this: when the client clicks download on a pdf, I want to edit/write some text on to the pdf using Itext pdf editor, then zip the pdf then let it download, All during the stream. I am aware of memory issue if the pdf is large etc. which won't be an issue since its like 20-50kb. I have the zipping during the stream before downloading working using byte array, now have to make the pdfeditor method also run before zipping, add some text then let the download happen.
Here is my code so far:
public class zipfolder {
public static void main(String[] args) {
try {
System.out.println("opening connection");
URL url = new URL("http://gitlab.itextsupport.com/itext/sandbox/raw/master/resources/pdfs/form.pdf");
InputStream in = url.openStream();
// FileOutputStream fos = new FileOutputStream(new
// File("enwiki.png"));
PdfEditor writepdf = new PdfEditor();
writepdf.manipulatePdf(url, dest, "field"); /// where i belive i
/// should execute the
/// editor function ?
File f = new File("test.zip");
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(f));
ZipEntry entry = new ZipEntry("newform.pdf");
zos.putNextEntry(entry);
System.out.println("reading from resource and writing to file...");
int length = -1;
byte[] buffer = new byte[1024];// buffer for portion of data from
// connection
while ((length = in.read(buffer)) > -1) {
zos.write(buffer, 0, length);
}
zos.close();
in.close();
System.out.println("File downloaded");
} catch (Exception e) {
System.out.println("Error");
e.printStackTrace();
}
}
}
public class PdfEditor {
public String insertFields (String field, String value) {
return field + " " + value;
// System.out.println("does this work :" + field);
}
// public static final String SRC = "src/resources/source.pdf";
// public static final String DEST = "src/resources/Destination.pdf";
//
// public static void main(String[] args) throws DocumentException,
// IOException {
// File file = new File(DEST);
// file.getParentFile().mkdirs();
// }
public String manipulatePdf(URL src, String dest, String field) throws Exception {
System.out.println("test");
try {
PdfReader reader = new PdfReader(src);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
AcroFields form = stamper.getAcroFields();
Item item = form.getFieldItem("Name");
PdfDictionary widget = item.getWidget(0);
PdfArray rect = widget.getAsArray(PdfName.RECT);
rect.set(2, new PdfNumber(rect.getAsNumber(2).floatValue() + 20f));
String value = field;
form.setField("Name", value);
form.setField("Company", value);
stamper.close();
} catch (Exception e) {
System.out.println("Error in manipulate");
System.out.println(e.getMessage());
throw e;
}
return field;
}
}

So playing with ByteArrayOutputStream, finally got it work. passing the input stream to 'manipulatepdf' and returning 'bytedata'.
public ByteArrayOutputStream manipulatePdf(InputStream in, String field) throws Exception {
System.out.println("pdfediter got hit");
ByteArrayOutputStream bytedata = new ByteArrayOutputStream();
try {
PdfReader reader = new PdfReader(in);
PdfStamper stamper = new PdfStamper(reader, bytedata);
AcroFields form = stamper.getAcroFields();
Item item = form.getFieldItem("Name");
PdfDictionary widget = item.getWidget(0);
PdfArray rect = widget.getAsArray(PdfName.RECT);
rect.set(2, new PdfNumber(rect.getAsNumber(2).floatValue() + 20f));
String value = field;
form.setField("Name", value);
form.setField("Company", value);
stamper.close();
} catch (Exception e) {
System.out.println("Error in manipulate");
System.out.println(e.getMessage());
throw e;
}
return bytedata;
}
public String editandzip (String data, String Link) {
try {
System.out.println("opening connection");
URL url = new URL(Link);
InputStream in = url.openStream();
System.out.println("in : "+ url);
//String data = "working ok with main";
PdfEditor writetopdf = new PdfEditor();
ByteArrayOutputStream bao = writetopdf.manipulatePdf(in, data);
byte[] ba = bao.toByteArray();
File f = new File("C:/Users/JayAcer/workspace/test/test.zip");
ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(f));
ZipEntry entry = new ZipEntry("newform.pdf");
entry.setSize(ba.length);
zos.putNextEntry(entry);
zos.write(ba);
zos.close();
in.close();
System.out.println("File downloaded");
} catch (Exception e) {
System.out.println("Error");
e.printStackTrace();
}
return data;
}
}

How to saving a HashMap to a file in Android?

I'm trying to save user settings to a file, from where I can read the later. But I cant get it to work properly. I've tried reading up on this, but I'm still having problems.
Map<String, String> userSettings = new HashMap<>();
public void updateUserSettings(){
userSettings.clear();
userSettings.put("item0", item0);
userSettings.put("item1", item1);
userSettings.put("item2", item2);
userSettings.put("item3", item3);
userSettings.put("item4", item4);
userSettings.put("item5", item5);
userSettings.put("item6", item6);
userSettings.put("item7", item7);
userSettings.put("i0", Float.toString(i0));
userSettings.put("i1", Float.toString(i1));
userSettings.put("i2", Float.toString(i2));
userSettings.put("i3", Float.toString(i3));
userSettings.put("i4", Float.toString(i4));
userSettings.put("i5", Float.toString(i5));
userSettings.put("i6", Float.toString(i6));
userSettings.put("i7", Float.toString(i7));
userSettings.put("huvudMaskin", huvudMaskin);
userSettings.put("minorMaskin1", minorMaskin1);
userSettings.put("minorMaskin2", minorMaskin2);
userSettings.put("maskinTid", Float.toString(maskinTid));
writeSettings();
}
public void writeSettings() {
try
{
FileOutputStream fos = context.openFileOutput("test.ser", Context.MODE_PRIVATE);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(userSettings);
oos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void readSetttings() {
try
{
FileInputStream fileInputStream = new FileInputStream(context.getFilesDir()+"test.ser");
ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
Map myHashMap = (Map)objectInputStream.readObject();
userSettings = null;
userSettings = myHashMap;
}
catch(ClassNotFoundException | IOException | ClassCastException e) {
e.printStackTrace();
}
executeSettings();
}
I have both read and write rights to the app.
Im not getting anything out of this. I've checked the hashmap, and it works as intended. I have also tried a lot of different approaches, and the only thing I managed to get working was saving strings to a .txt file.

private String subFolder = "/userdata";
private String file = "test.ser";
public void writeSettings() {
File cacheDir = null;
File appDirectory = null;
if (android.os.Environment.getExternalStorageState().
equals(android.os.Environment.MEDIA_MOUNTED)) {
cacheDir = getApplicationContext().getExternalCacheDir();
appDirectory = new File(cacheDir + subFolder);
} else {
cacheDir = getApplicationContext().getCacheDir();
String BaseFolder = cacheDir.getAbsolutePath();
appDirectory = new File(BaseFolder + subFolder);
}
if (appDirectory != null && !appDirectory.exists()) {
appDirectory.mkdirs();
}
File fileName = new File(appDirectory, file);
FileOutputStream fos = null;
ObjectOutputStream out = null;
try {
fos = new FileOutputStream(fileName);
out = new ObjectOutputStream(fos);
out.writeObject(userSettings);
} catch (IOException ex) {
ex.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (fos != null)
fos.flush();
fos.close();
if (out != null)
out.flush();
out.close();
} catch (Exception e) {
}
}
}
public void readSetttings() {
File cacheDir = null;
File appDirectory = null;
if (android.os.Environment.getExternalStorageState().
equals(android.os.Environment.MEDIA_MOUNTED)) {
cacheDir = getApplicationContext().getExternalCacheDir();
appDirectory = new File(cacheDir + subFolder);
} else {
cacheDir = getApplicationContext().getCacheDir();
String BaseFolder = cacheDir.getAbsolutePath();
appDirectory = new File(BaseFolder + subFolder);
}
if (appDirectory != null && !appDirectory.exists()) return; // File does not exist
File fileName = new File(appDirectory, file);
FileInputStream fis = null;
ObjectInputStream in = null;
try {
fis = new FileInputStream(fileName);
in = new ObjectInputStream(fis);
Map<String, String> myHashMap = (Map<String, String> ) in.readObject();
userSettings = myHashMap;
System.out.println("count of hash map::"+userSettings.size() + " " + userSettings);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (StreamCorruptedException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
if(fis != null) {
fis.close();
}
if(in != null) {
in.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}

Your problem is very simple: you are using two different file names when writing the data resp. reading it.
FileOutputStream fos = context.openFileOutput("test.ser", Context.MODE_PRIVATE);
vs.
FileInputStream fileInputStream = new FileInputStream(context.getFilesDir()+"test.ser");
And, most likely, your reading code did throw an IOException at you, telling you something about trying to open a file that doesn't exist.
Thus, the real take-away/answer here: read those exception messages very carefully. Typically, they tell you exactly what the problem is!

Change these lines :
public void readSetttings(){
String path=context.getFilesDir() + File.seprator + "test.ser";
if(! new File(path).exists() ){
//throw NullPointerException ;
//return;
/*
*you can choose one of these
*pay attention : when choose NullPointerException you shold add throws Exceptions on your method
*/
}
try{
FileInputStream fileInputStream =context.openFileInput("test.ser");
ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
Map myHashMap = (Map)objectInputStream.readObject();
userSettings = myHashMap;
}catch(ClassNotFoundException | IOException | ClassCastException e) {
e.printStackTrace();
}
executeSettings();
}

If it is only primitives that you want to store then you should be using SharedPreferences which Android provides out of the box.
public static final String PREFS = "usersettings";
#Override
protected void onCreate(Bundle b){
.....
// read user settings on start
SharedPreferences settings = getSharedPreferences(PREFS, 0);
int someId = settings.getInteger("someId", 0);
setSomeId(id);
}
#Override
protected void onStop(){
.....
SharedPreferences settings = getSharedPreferences(PREFS, 0);
SharedPreferences.Editor editor = settings.edit();
editor.putInteger("someId", mSomeId);
// commit changes on exit
editor.commit();
}

Read and Write text file from my own class in Android Studio

I have been trying to create a class called TextFileReaderWriter I want to use the getters and setters to read and write to a text file in such a way that I can call the class and the method from anywhere in the program by simply using setfileContents(somestring) and somestring = getfileContents() something like this
example:
TextFileReaderWriter trw = new TextFileReaderWriter();
trw.setfileContents(somestring); //this would write 'somestring' to the text file.
String somestring = trw.getfileContents(); //this would return 'somestring' from the text file.
Here's what I have so far but it writes nothing to the file:
public class TextFileReaderWriter extends Activity{
String fileContents;
Context context;
String TAG = "MYTAG";
public TextFileReaderWriter(String fileContents, Context context) {
this.fileContents = fileContents;
this.context = context;
}
public String getFileContents() {
return fileContents;
}
public void setFileContents(String fileContents) {
this.fileContents = fileContents;
FileOutputStream fos = null;
try {
fos = context.openFileOutput("UserInputStore", Context.MODE_PRIVATE);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
OutputStreamWriter osw = new OutputStreamWriter(fos);
try {
osw.write(fileContents);
Log.d(TAG, fileContents);
} catch (IOException e) {
e.printStackTrace();
}
}
}

You don't need the OutputStreamWriter--FileOutputStreamwill do the trick just fine.
//what you had before
FileOutputStream fos = null;
try {
fos = context.openFileOutput(filename, Context.MODE_PRIVATE);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//use just the file output stream to write the data
//data here is a String
if (fos != null) {
try {
fos.write(data.getBytes());
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}

Method to save data on disk :
protected static void saveDataOnDisk(String data) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
try {
ObjectOutput objectOutput = new ObjectOutputStream(byteArrayOutputStream);
objectOutput.writeObject(data);
byte[] buffer = byteArrayOutputStream.toByteArray();
File loginDataFile = (new File(filePath)); // file path where you want to write your data
loginDataFile.createNewFile();
FileOutputStream fileOutputStream = new FileOutputStream(loginDataFile);
fileOutputStream.write(buffer);
fileOutputStream.close();
objectOutput.flush();
objectOutput.close();
byteArrayOutputStream.flush();
byteArrayOutputStream.close();
Log.i(“SAVE”, ”———————-DONE SAVING”);
} catch(IOException ioe) {
Log.i(“SAVE”, “———serializeObject|”+ioe);
}
}
Method to fetch data from disk:
private static Object getDataFromDisk() {
try {
FileInputStream fileInputeStream = new FileInputStream(FilePath);
ObjectInputStream objectInputStream = new ObjectInputStream(fileInputeStream);
Object data = (Object) objectInputStream.readObject();
objectInputStream.close();
fileInputeStream.close();
return dataModel;
} catch (Exception error) {
Log.i(“FETCH”, ”—-getDataFromDisk———ERROR while reading|” + error);
}
return null;
}

FileInputStream unmarshalling, but HttpInputStream won't in Java

I can marhsall XML from a file when I read it from disk, but when I download it via the web I get this error.
[org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Premature end of file.]
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException
I assume the web input stream contains additional information or something?
Works
InputStream inputStream = null;
try {
inputStream = new FileInputStream(filePath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Doesnt Work
InputStream inputStream = null;
try {
inputStream = new URL(url).openStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
BulkDataRecordType bulkDataRecordType = getObjectFromXml(inputStream);
In another class
public BulkDataRecordType getObjectFromXml(InputStream inputStream)
{
try {
JAXBContext jc = JAXBContext.newInstance(BulkDataRecordType.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
bulkDataRecordType = (BulkDataRecordType) unmarshaller.unmarshal(inputStream);
} catch (JAXBException e1) {
e1.printStackTrace();
}

I am first checking the checksum of the string. Once I commented this out it worked. I found a solution to create two new streams and it worked. If you have a better solution let me know.
public byte[] getCheckSumFromFile(InputStream inputStream)
{
MessageDigest md = null;
try {
md = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}
InputStream is = null;
try {
is = new DigestInputStream(inputStream, md);
}
finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
return md.digest();
}
Create Two Streams From Original
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
try {
byte[] buffer = new byte[1024];
int len;
while ((len = inputStream.read(buffer)) > -1 ) {
byteArrayOutputStream.write(buffer, 0, len);
}
byteArrayOutputStream.flush();
} catch (IOException e1) {
e1.printStackTrace();
}
inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
// Get check sum of downloaded file
byte[] fileCheckSum = getCheckSumFromFile(new ByteArrayInputStream(byteArrayOutputStream.toByteArray()));