Develop Reference

i am trying to convert .jsp to .pdf format using pd4ml. when start executing my code i am getting execption below

public static void main(String[] args) {
try {
PdfViewerStarter jt = new PdfViewerStarter();
jt.doConversion("http://pd4ml.com/sample.htm", "D:/pd4ml.pdf");
} catch (Exception e) {
e.printStackTrace();
}
}
public void doConversion(String url, String outputPath)
throws InvalidParameterException, MalformedURLException, IOException {
File output = new File(outputPath);
java.io.FileOutputStream fos = new java.io.FileOutputStream(output);
PD4ML pd4ml = new PD4ML();
pd4ml.setHtmlWidth(userSpaceWidth);
pd4ml.setPageSize(pd4ml.changePageOrientation(PD4Constants.A4));
pd4ml.setPageInsetsMM(new Insets(topValue, leftValue, bottomValue, rightValue));
pd4ml.useTTF("c:/windows/fonts", true);
pd4ml.render(new URL(url), fos);
fos.close();
if (Desktop.isDesktopSupported()) {
Desktop.getDesktop().open(output);
} else {
System.out.println("Awt Desktop is not supported!");
}
System.out.println(outputPath + "\ndone.");
}
Error:
Error. ss_css2.jar is not in the classpath. See README.txt
Exception in thread "main" java.lang.NoClassDefFoundError: org/w3c/css/sac/CSSException
at org.zefer.html.doc.PD4MLHtmlParser.o00000(Unknown Source)
at org.zefer.html.doc.PD4MLHtmlParser.<init>(Unknown Source)
at org.zefer.pd4ml.PD4ML.super(Unknown Source)
at org.zefer.pd4ml.PD4ML.render(Unknown Source)
at TestForPdfPD4ML.doConversion(TestForPdfPD4ML.java:42)
at TestForPdfPD4ML.main(TestForPdfPD4ML.java:24)
Caused by: java.lang.ClassNotFoundException: org.w3c.css.sac.CSSException
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 6 more

It may be asking for the ClassPath of the Jar File where the needed (imported) libraries are contained. If you are running from Command Line try something like this:
java -cp .;"The full path where the Jar File is\jarfile.jar" YourRunningClassFile

TikaException: Failed to close temporary resource while parsing PDF

I am using Apache Tika on Windows 10, jre 1.8.0_241, and I've imported Tika 1.24.1 using ant. I have the code below to extract content from a PDF:
public class TikaExtraction {
public static void main(final String[] args) throws IOException, TikaException {
//Assume sample.txt is in your current directory
File file = new File("C:\\Users\\myPC\\Desktop\\testPDF.pdf");
//Instantiating Tika facade class
Tika tika = new Tika();
String filecontent = tika.parseToString(file);
System.out.println("Extracted Content: " + filecontent);
}
}
Getting below exception:
Exception in thread "main" org.apache.tika.exception.TikaException: Failed to close temporary resources
at org.apache.tika.io.TemporaryResources.dispose(TemporaryResources.java:174)
at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:150)
at org.apache.tika.Tika.parseToString(Tika.java:527)
at com.oracle.cegbu.filesearch.service.kafka.TikaExtraction.main(TikaExtraction.java:28)
Caused by: java.nio.file.FileSystemException: C:\Users\myPC\AppData\Local\Temp\apache-tika-6518312717498705085.tmp: The process cannot access the file because it is being used by another process.
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.implDelete(Unknown Source)
at sun.nio.fs.AbstractFileSystemProvider.delete(Unknown Source)
at java.nio.file.Files.delete(Unknown Source)
at org.apache.tika.io.TemporaryResources$1.close(TemporaryResources.java:84)
at org.apache.tika.io.TemporaryResources.close(TemporaryResources.java:145)
at org.apache.tika.io.TemporaryResources.dispose(TemporaryResources.java:172)
... 3 more

Lets try to use the inputStream instead of File in try-in-resources
public class TikaExtraction {
public static void main(final String[] args) throws IOException, TikaException {
//Assume sample.txt is in your current directory
Tika tika = new Tika();
File file = new File("C:\\Users\\myPC\\Desktop\\testPDF.pdf");
//Instantiating Tika facade class
try(InputStream inputStream = new FileInputStream(file)) {
String filecontent = tika.parseToString(inputStream);
System.out.println("Extracted Content: " + filecontent);
}
}
}

Launch JavaFX project using reflection

I have a program, that downloads a Git repository, builds it and launches defined Main class. It works properly with ordinary projects, but when I want to launch a JavaFX project, I get strange errors like:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at Main.main(Main.java:31)
Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: app.UI_Main
at javafx.application.Application.launch(Application.java:260)
at app.UI_Main.main(UI_Main.java:31)
... 5 more
Caused by: java.lang.ClassNotFoundException: app.UI_Main
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at javafx.application.Application.launch(Application.java:248)
... 6 more
My Main class is:
public class Main {
private static final String GIT_ADDRESS = "https://github.com/lerryv/CheckCheckerDesktop";
private static final String MAIN_PATH = "app/";
private static final String MAIN_CLASS = "app.UI_Main";
public static void main(String[] args) throws GitAPIException, IOException, ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
Git.cloneRepository().setURI(GIT_ADDRESS).setDirectory(Paths.get("./dir/").toFile()).call();
Collection<String> result = compile(Paths.get("./dir/src/").toFile());
String command = System.getProperty("java.home") + "/../bin/javac -d dirOut -cp \".:json-simple-1.1.jar\" " + result.join(" ");
Runtime.getRuntime().exec(command);
URLClassLoader urlClassLoader = URLClassLoader.newInstance(
new URL[]{
new File("dirOut/").toURI().toURL()
}
);
Class clazz = urlClassLoader.loadClass(MAIN_CLASS);
Method main = clazz.getDeclaredMethod("main", String[].class);
assert Modifier.isStatic(main.getModifiers());
main.invoke(null, (Object) args);
}
private static Collection<String> compile(File directory) {
assert directory.isDirectory();
Collection<String> result = new Collection<>();
boolean hasFiles = false;
for (File file: directory.listFiles()) {
if (file.isDirectory()) {
result.addAll(compile(file));
} else {
if (!hasFiles) {
String path = file.getAbsolutePath();
String extension = path.substring(path.lastIndexOf(".") + 1);
if (extension.equals("java")) hasFiles = true;
}
}
}
if (hasFiles) result.add(directory.getAbsolutePath() + "/*.java");
return result;
};
}
At first I thought it cannot find the class, but when I removed the method.invoke statement, errors disappeared. Why does it happen and are there any workarounds?

Runtime.getRuntime().exec(command)
This is starting another process, so after this line is executed compilation is not yet finished, you need to wait for this process to end, and probably you should also handle output/error stream of process to check if it succeed or not.
Process compileProc = Runtime.getRuntime().exec(command);
compileProc.waitFor();
Also I don't know what are you trying to do, but remember that not everyone might have compiler available and configured java.hame property, or configured it to different java version. (like older one and your code will not compile or newer one and you code will not run)

The program opens a new thread to start the project, but it executes the next line without monitoring its completion, so the thread can be removed if it is not necessary. If necessary, you need to write a monitoring thread to monitor and schedule all threads so that it can continue to execute after it has finished its work. Tasks of the main thread.

ClassNotFoundException in FreeTTS Java program

I am new to FreeTTS and this is my first program.The following program simply reads out a string passed.
I am using Linux Mint 32-bit if that matters.But I extracted jsapi.jar on my windows machine a day back.I believe it doesn't matter.
import javax.speech.*;
import java.util.*;
import javax.speech.synthesis.*;
public class Speak
{
String speaktext;
public void dospeak(String speak,String voicename)
{
speaktext=speak;
String voiceName =voicename;
try
{
SynthesizerModeDesc desc = new SynthesizerModeDesc(null,"general", Locale.US,null,null);
Synthesizer synthesizer = Central.createSynthesizer(desc);
synthesizer.allocate();
synthesizer.resume();
desc = (SynthesizerModeDesc) synthesizer.getEngineModeDesc();
Voice[] voices = desc.getVoices();
Voice voice = null;
for (int i = 0; i < voices.length; i++)
{
if (voices[i].getName().equals(voiceName))
{
voice = voices[i];
break;
}
}
synthesizer.getSynthesizerProperties().setVoice(voice);
System.out.print("Speaking : "+speaktext);
synthesizer.speakPlainText(speaktext, null);
synthesizer.waitEngineState(Synthesizer.QUEUE_EMPTY);
synthesizer.deallocate();
}
catch (Exception e)
{
String message = " missing speech.properties in " + System.getProperty("user.home") + "\n";
System.out.println(""+e);
System.out.println(message);
}
}
public static void main(String[] args)
{
Speak obj=new Speak();
obj.dospeak("Finally It speaks and speaks and speaks","kevin16");
}
}
I am getting this as a gift.
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/speech/freetts/ValidationException
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at javax.speech.Central.registerEngineCentral(Central.java:703)
at javax.speech.Central.loadProps(Central.java:775)
at javax.speech.Central.availableSynthesizers(Central.java:651)
at javax.speech.Central.createSynthesizer(Central.java:553)
at Speak.dospeak(Speak.java:16)
at Speak.main(Speak.java:47)
Caused by: java.lang.ClassNotFoundException: com.sun.speech.freetts.ValidationException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 8 more
What can I do not to accept this gift.
PS
I have added all the 4 archives viz en_us.jar,freetts-jsapi10.jar, jsapi.jar,mbrola.jar

1) Find in which jar this class is usually defined:
com.sun.speech.freetts.ValidationException
2) See if you have the jar
3) See if you have the right version of this jar
(open it, see if the class file is there)
4) See if the jar is in the classpath at runtime

loading another class with javassist

I have two projects: a profiler and a basic application (with JUnit tests)
The profiler uses Javassist to instrument the basic application.
When the profiler is inside the basic application, it works fine.
When the profiler is outside the basic application, I have to import the basic application jar file into the build path on Eclipse to be abble to instrument my application.
I want to run my profiler on my basic application in command line as EMMA does:
java -jar profiler.jar run application.jar
But I don't know how to tell my profiler, ok, instrument this jar.
Here is my profiler main code:
public static void main(String[] args) throws Exception {
Loader loader = new Loader();
loader.addTranslator(ClassPool.getDefault(), new Profiler());
try {
loader.run("com.application.bookstore.test.Test", null);
} catch (Throwable e) {
e.printStackTrace();
}
}
I tried to do that:
final String arg = args[0];
final String[] commandArgs = new String[args.length - 1];
System.arraycopy(args, 1, commandArgs, 0, commandArgs.length-1);
loader.run(arg, commandArgs);
But when I run it, I get:
[kdelemme#pdkdelemme build]$ java -jar profiler.jar bookstore.jar
java.lang.ClassNotFoundException: bookstore.jar
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at javassist.Loader.delegateToParent(Loader.java:429)
at javassist.Loader.loadClass(Loader.java:315)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at javassist.Loader.run(Loader.java:289)
at com.modeln.Profiler.main(Profiler.java:93)
So I tried to run directly into my Main class directory:
[kdelemme#pdkdelemme test]$ ls
profiler.jar Test.class
[kdelemme#pdkdelemme test]$ java -jar profiler.jar Test
java.lang.NoClassDefFoundError: Test (wrong name: com/application/bookstore/test/Test)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.lang.ClassLoader.defineClass(ClassLoader.java:480)
at javassist.Loader.findClass(Loader.java:380)
at javassist.Loader.loadClass(Loader.java:312)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at javassist.Loader.run(Loader.java:289)
at com.modeln.Profiler.main(Profiler.java:93)
So Have you any ideas to how run my profiler on an outside jar project? Thanks a lot!

Ok, here's the solution: Just pool.insertClassPath()
public static void main(String[] args) throws Exception {
Loader loader = new Loader();
loader.addTranslator(ClassPool.getDefault(), new Profiler());
try {
if (args.length < 1) {
System.out.println(TOOL_USAGE);
} else {
//Initialize profiler with config/config.properties file
initializeProfiler();
final String[] commandArgs = new String[args.length - 1];
System.arraycopy(args, 1, commandArgs, 0, commandArgs.length);
//Open a jar file, unJar it into /tmp/ then add the /tmp/ classpath to the javassist laoder
File file = new File(args[0]);
JarFile jarFile = new JarFile(args[0]);
Manifest manifest = jarFile.getManifest();
String mainClassName = null;
if (manifest != null) {
mainClassName = manifest.getMainAttributes().getValue("Main-Class");
}
jarFile.close();
mainClassName = mainClassName.replaceAll("/", ".");
//Default temp directory is Jarfilename without .jar
final File workDir = File.createTempFile(args[0].substring(0, args[0].indexOf('.')), "");
workDir.delete();
workDir.mkdirs();
//Unjar all files into WorkDir temp directory
unJar(file, workDir);
//Add all directories into classPath
createClassPath(workDir, file);
//Add the classPath with unJar files into the Javassist ClassPool
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath(workDir + "/");
loader.run(mainClassName, null);
}
} catch (Throwable e) {
e.printStackTrace();
}
System.out.println("Instrumentation of " + args[0] + " finished.");
}