Example usage for java.lang NullPointerException NullPointerException

Introduction

In this page you can find the example usage for java.lang NullPointerException NullPointerException.

Prototype

public NullPointerException(String s) 

Source Link

Document

Constructs a NullPointerException with the specified detail message.

Usage

From source file:MainClass.java

public static void main(String args[]) {
    try {//from  w  ww  . j av a 2 s .  co m
        throw new NullPointerException("demo");
    } catch (NullPointerException e) {
        System.out.println("recaught: " + e);
        e.printStackTrace();
    }
}

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From source file:com.github.aliteralmind.codelet.examples.non_xbn.PrintJDBlocksStartStopLineNumsXmpl.java

/**
   <p>The main function.</p>
 *///from  w  w w  . ja v a  2s.c o  m
public static final void main(String[] as_1RqdJavaSourcePath) {

    //Read command-line parameter
    String sJPath = null;
    try {
        sJPath = as_1RqdJavaSourcePath[0];
    } catch (ArrayIndexOutOfBoundsException aibx) {
        throw new NullPointerException(
                "Missing one-and-only required parameter: Path to java source-code file.");
    }
    System.out.println("Java source: " + sJPath);

    //Establish line-iterator
    Iterator<String> lineItr = null;
    try {
        lineItr = FileUtils.lineIterator(new File(sJPath)); //Throws npx if null
    } catch (IOException iox) {
        throw new RTIOException("PrintJDBlocksStartStopLinesXmpl", iox);
    }
    Pattern pTrmdJDBlockStart = Pattern.compile("^[\\t ]*/\\*\\*");

    String sDD = "..";
    int lineNum = 1;
    boolean bInJDBlock = false;
    while (lineItr.hasNext()) {
        String sLn = lineItr.next();
        if (!bInJDBlock) {
            if (pTrmdJDBlockStart.matcher(sLn).matches()) {
                bInJDBlock = true;
                System.out.print(lineNum + sDD);
            }
        } else if (sLn.indexOf("*/") != -1) {
            bInJDBlock = false;
            System.out.println(lineNum);
        }
        lineNum++;
    }
    if (bInJDBlock) {
        throw new IllegalStateException("Reach end of file. JavaDoc not closed.");
    }
}

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From source file:com.morty.podcast.writer.validation.StandardFileValidator.java

public static void main(String[] args) {
    //Process a directory without exclusion...
    Log m_logger = LogFactory.getLog(StandardFileValidator.class);
    m_logger.info("Starting Validator");

    if (args.length != 1)
        throw new NullPointerException("No directory specified");

    String fileToProcess = args[0];
    m_logger.info("Processing [" + fileToProcess + "]");
    StandardFileValidator sfv = new StandardFileValidator();
    sfv.setFolderToProcess(new File(fileToProcess));
    try {//from  w ww  .  ja  v  a  2 s  . c o  m
        sfv.process();
        m_logger.info("Directory Valid");
    } catch (Exception ex) {
        m_logger.info("Directory InValid");
        m_logger.error("Error thrown", ex);
    }

    m_logger.info("Finished Validator");
}

---

From source file:MailHandlerDemo.java

/**
 * Runs the demo./*from   w  w w  . jav a  2s  . c  om*/
 *
 * @param args the command line arguments
 * @throws IOException if there is a problem.
 */
public static void main(String[] args) throws IOException {
    List<String> l = Arrays.asList(args);
    if (l.contains("/?") || l.contains("-?") || l.contains("-help")) {
        LOGGER.info("Usage: java MailHandlerDemo " + "[[-all] | [-body] | [-custom] | [-debug] | [-low] "
                + "| [-simple] | [-pushlevel] | [-pushfilter] " + "| [-pushnormal] | [-pushonly]] " + "\n\n"
                + "-all\t\t: Execute all demos.\n" + "-body\t\t: An email with all records and only a body.\n"
                + "-custom\t\t: An email with attachments and dynamic names.\n"
                + "-debug\t\t: Output basic debug information about the JVM " + "and log configuration.\n"
                + "-low\t\t: Generates multiple emails due to low capacity." + "\n"
                + "-simple\t\t: An email with all records with body and " + "an attachment.\n"
                + "-pushlevel\t: Generates high priority emails when the"
                + " push level is triggered and normal priority when " + "flushed.\n"
                + "-pushFilter\t: Generates high priority emails when the "
                + "push level and the push filter is triggered and normal " + "priority emails when flushed.\n"
                + "-pushnormal\t: Generates multiple emails when the "
                + "MemoryHandler push level is triggered.  All generated "
                + "email are sent as normal priority.\n" + "-pushonly\t: Generates multiple emails when the "
                + "MemoryHandler push level is triggered.  Generates high "
                + "priority emails when the push level is triggered and " + "normal priority when flushed.\n");
    } else {
        final boolean debug = init(l); //may create log messages.
        try {
            LOGGER.log(Level.FINEST, "This is the finest part of the demo.",
                    new MessagingException("Fake JavaMail issue."));
            LOGGER.log(Level.FINER, "This is the finer part of the demo.",
                    new NullPointerException("Fake bug."));
            LOGGER.log(Level.FINE, "This is the fine part of the demo.");
            LOGGER.log(Level.CONFIG, "Logging config file is {0}.", getConfigLocation());
            LOGGER.log(Level.INFO, "Your temp directory is {0}, " + "please wait...", getTempDir());

            try { //Waste some time for the custom formatter.
                Thread.sleep(3L * 1000L);
            } catch (InterruptedException ex) {
                Thread.currentThread().interrupt();
            }

            LOGGER.log(Level.WARNING, "This is a warning.",
                    new FileNotFoundException("Fake file chooser issue."));
            LOGGER.log(Level.SEVERE, "The end of the demo.", new IOException("Fake access denied issue."));
        } finally {
            closeHandlers();
        }

        //Force parse errors.  This does have side effects.
        if (debug && getConfigLocation() != null) {
            LogManager.getLogManager().readConfiguration();
        }
    }
}

---

From source file:marytts.tools.analysis.CopySynthesis.java

/**
 * @param args/*  w  ww  .  ja  v a2  s  .  co  m*/
 */
public static void main(String[] args) throws Exception {
    String wavFilename = null;
    String labFilename = null;
    String pitchFilename = null;
    String textFilename = null;

    String locale = System.getProperty("locale");
    if (locale == null) {
        throw new IllegalArgumentException("No locale given (-Dlocale=...)");
    }

    for (String arg : args) {
        if (arg.endsWith(".txt"))
            textFilename = arg;
        else if (arg.endsWith(".wav"))
            wavFilename = arg;
        else if (arg.endsWith(".ptc"))
            pitchFilename = arg;
        else if (arg.endsWith(".lab"))
            labFilename = arg;
        else
            throw new IllegalArgumentException("Don't know how to treat argument: " + arg);
    }

    // The intonation contour
    double[] contour = null;
    double frameShiftTime = -1;
    if (pitchFilename == null) { // need to create pitch contour from wav file 
        if (wavFilename == null) {
            throw new IllegalArgumentException("Need either a pitch file or a wav file");
        }
        AudioInputStream ais = AudioSystem.getAudioInputStream(new File(wavFilename));
        AudioDoubleDataSource audio = new AudioDoubleDataSource(ais);
        PitchFileHeader params = new PitchFileHeader();
        params.fs = (int) ais.getFormat().getSampleRate();
        F0TrackerAutocorrelationHeuristic tracker = new F0TrackerAutocorrelationHeuristic(params);
        tracker.pitchAnalyze(audio);
        frameShiftTime = tracker.getSkipSizeInSeconds();
        contour = tracker.getF0Contour();
    } else { // have a pitch file -- ignore any wav file
        PitchReaderWriter f0rw = new PitchReaderWriter(pitchFilename);
        if (f0rw.contour == null) {
            throw new NullPointerException("Cannot read f0 contour from " + pitchFilename);
        }
        contour = f0rw.contour;
        frameShiftTime = f0rw.header.skipSizeInSeconds;
    }
    assert contour != null;
    assert frameShiftTime > 0;

    // The ALLOPHONES data and labels
    if (labFilename == null) {
        throw new IllegalArgumentException("No label file given");
    }
    if (textFilename == null) {
        throw new IllegalArgumentException("No text file given");
    }
    MaryTranscriptionAligner aligner = new MaryTranscriptionAligner();
    aligner.SetEnsureInitialBoundary(false);
    String labels = MaryTranscriptionAligner.readLabelFile(aligner.getEntrySeparator(),
            aligner.getEnsureInitialBoundary(), labFilename);
    MaryHttpClient mary = new MaryHttpClient();
    String text = FileUtils.readFileToString(new File(textFilename), "ASCII");
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    mary.process(text, "TEXT", "ALLOPHONES", locale, null, null, baos);
    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
    docFactory.setNamespaceAware(true);
    DocumentBuilder builder = docFactory.newDocumentBuilder();
    Document doc = builder.parse(bais);
    aligner.alignXmlTranscriptions(doc, labels);
    assert doc != null;

    // durations
    double[] endTimes = new LabelfileDoubleDataSource(new File(labFilename)).getAllData();
    assert endTimes.length == labels.split(Pattern.quote(aligner.getEntrySeparator())).length;

    // Now add durations and f0 targets to document
    double prevEnd = 0;
    NodeIterator ni = MaryDomUtils.createNodeIterator(doc, MaryXML.PHONE, MaryXML.BOUNDARY);
    for (int i = 0; i < endTimes.length; i++) {
        Element e = (Element) ni.nextNode();
        if (e == null)
            throw new IllegalStateException("More durations than elements -- this should not happen!");
        double durInSeconds = endTimes[i] - prevEnd;
        int durInMillis = (int) (1000 * durInSeconds);
        if (e.getTagName().equals(MaryXML.PHONE)) {
            e.setAttribute("d", String.valueOf(durInMillis));
            e.setAttribute("end", new Formatter(Locale.US).format("%.3f", endTimes[i]).toString());
            // f0 targets at beginning, mid, and end of phone
            StringBuilder f0String = new StringBuilder();
            double startF0 = getF0(contour, frameShiftTime, prevEnd);
            if (startF0 != 0 && !Double.isNaN(startF0)) {
                f0String.append("(0,").append((int) startF0).append(")");
            }
            double midF0 = getF0(contour, frameShiftTime, prevEnd + 0.5 * durInSeconds);
            if (midF0 != 0 && !Double.isNaN(midF0)) {
                f0String.append("(50,").append((int) midF0).append(")");
            }
            double endF0 = getF0(contour, frameShiftTime, endTimes[i]);
            if (endF0 != 0 && !Double.isNaN(endF0)) {
                f0String.append("(100,").append((int) endF0).append(")");
            }
            if (f0String.length() > 0) {
                e.setAttribute("f0", f0String.toString());
            }
        } else { // boundary
            e.setAttribute("duration", String.valueOf(durInMillis));
        }
        prevEnd = endTimes[i];
    }
    if (ni.nextNode() != null) {
        throw new IllegalStateException("More elements than durations -- this should not happen!");
    }

    // TODO: add pitch values

    String acoustparams = DomUtils.document2String(doc);
    System.out.println("ACOUSTPARAMS:");
    System.out.println(acoustparams);
}

---

From source file:Main.java

static void demoproc() {
    NullPointerException e = new NullPointerException("top layer");
    e.initCause(new ArithmeticException("cause"));
    throw e;/* www.j a  v a 2 s  .co  m*/
}

---

From source file:Main.java

static void aMethod() {
    try {/*from w  w w.  ja v a  2s  .  co  m*/
        throw new NullPointerException("demo");
    } catch (NullPointerException e) {
        System.out.println("Caught inside demoproc.");
        throw e; // rethrow the exception
    }
}

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From source file:ChainExcDemo.java

static void demoproc() {
    NullPointerException e = new NullPointerException("top layer");

    e.initCause(new ArithmeticException("cause"));

    throw e;//from  w w  w.java2s.c o  m
}

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From source file:Main.java

public static void throwException() {
    throw new NullPointerException("I am Exception");
}

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From source file:Main.java

public static <T> void paramCheck(T t) {
    if (t == null) {
        throw new NullPointerException("param is null");
    }//from   w ww.jav  a2s  .c  o m
}

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