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()

Source Link

Document

Constructs a NullPointerException with no detail message.

Usage

From source file:simple.crawler.http.HttpClientUtil.java

public static String fetch(HttpClient httpclient, String uri) throws Exception {
    if (httpclient == null) {
        throw new NullPointerException();
    }//from w  ww .  j a  v a2s  .  c  o m
    if (uri == null) {
        throw new NullPointerException();
    }
    HttpGet get = new HttpGet(uri);
    return getContentBodyAsString(httpclient.execute(get));
}

From source file:com.pokercompany.stringcalc.StringCalculator.java

public int add(String numbers) throws Exception {
    if (numbers == null) {
        throw new NullPointerException();
    }//w ww . j av  a 2  s  .c  om

    if (numbers.equals("")) {
        return 0;
    }

    if (!numbers.matches("-?[0-9]+([" + separator + "]-?[0-9]+)*[" + separator + "]?")) {
        throw new NumberFormatException("Bad character(s) in input string: " + numbers);
    }

    List<String> numbersList = Arrays.asList(numbers.split("(?<!\\" + separator + ")[" + separator + "]"));
    List<String> negativeNumbers = StringCalcUtil.getListWherePatternMatches(numbersList, "[-][0-9]+");

    if (negativeNumbers.size() > 0) {
        throw new Exception("Negative not allowed: " + StringUtils.join(negativeNumbers.iterator(), ","));
    }

    int sum = 0;
    for (String stringNumber : numbersList) {
        sum += Integer.valueOf(stringNumber);
    }

    return sum;
}

From source file:ClassUtils.java

/**
 * Get the ClassLoader to use. We always use the current Thread's
 * Context ClassLoader. Assumption is that all threads within the
 * application share the same ClassLoader.
 *//*  ww w  .  ja  va 2 s. c  o m*/
private static ClassLoader getClassLoader() {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    if (cl == null) {
        throw new NullPointerException();
    }
    return cl;
}

From source file:com.hd.stringcalculator.StringCalculator.java

public int add(String numbers) throws NegativeNumberException {
    if (numbers == null) {
        throw new NullPointerException();
    } else if (numbers.isEmpty()) {
        return 0;
    }/*w  w w. j  av  a 2 s  .  c om*/

    if (!numbers.matches(
            "-?[0-9]+((" + Pattern.quote(separator) + ")-?[0-9]+)*(" + Pattern.quote(separator) + ")?")) {
        throw new IllegalArgumentException("Bad character(s) in input string: " + numbers);
    }

    List<String> numbersList = Arrays
            .asList(numbers.split("(?<!" + Pattern.quote(separator) + ")" + Pattern.quote(separator)));
    List<String> negativeNumbers = new StringListFilter("[-][0-9]+").filter(numbersList);

    if (negativeNumbers.size() > 0) {
        throw new NegativeNumberException(StringUtils.join(negativeNumbers.iterator(), ", "));
    }

    int sum = 0;
    for (String stringNumber : numbersList) {
        sum += Integer.valueOf(stringNumber);
    }

    return sum;
}

From source file:net.chunkyhosting.Roe.CHGManagerLauncher.utils.JSON.java

public static JSONObject readJsonFromFile(File file)
        throws FileNotFoundException, IOException, NullPointerException {

    String json = "NULL";
    BufferedReader reader = new BufferedReader(new FileReader(file.toString()));
    String read = "";
    while ((read = reader.readLine()) != null) {

        json = json + read;/*w  w  w .  j a va  2  s . co m*/

    }

    reader.close();

    if (!json.equalsIgnoreCase("NULL")) {

        return stringToJson(json);

    }

    throw new NullPointerException();

}

From source file:com.lxht.emos.data.cache.intf.HessianUtil.java

/**
 * ?.// w  ww  . ja va  2s.  c  om
 *
 * @param obj      ??
 * @param fileName ????.
 * @throws IOException
 */
public static void serialize(Object obj, String fileName) throws IOException {
    if (obj == null)
        throw new NullPointerException();
    File file = new File(fileName);

    // ?.
    if (!file.getParentFile().exists()) {
        file.getParentFile().mkdirs();
    }

    FileOutputStream fos = new FileOutputStream(file);
    HessianOutput ho = new HessianOutput(fos);
    ho.writeObject(obj);
    ho.flush();
    ho.close();
    fos.close();
}

From source file:Main.java

/**
 * Submits a value-returning task for execution on the EDT and
 * returns a Future representing the pending results of the task.
 *
 * @param task the task to submit// w  w w. ja  v  a2 s .c o m
 * @return a Future representing pending completion of the task
 * @throws NullPointerException if the task is null
 */
public static <V> Future<V> submit(Callable<V> task) {
    if (task == null) {
        throw new NullPointerException();
    }
    FutureTask<V> future = new FutureTask<V>(task);
    execute(future);
    return future;
}

From source file:XMLResourceBundleControl.java

public ResourceBundle newBundle(String baseName, Locale locale, String format, ClassLoader loader,
        boolean reload) throws IllegalAccessException, InstantiationException, IOException {

    if ((baseName == null) || (locale == null) || (format == null) || (loader == null)) {
        throw new NullPointerException();
    }//from   w ww. j a v  a 2s .  c o m
    ResourceBundle bundle = null;
    if (!format.equals(XML)) {
        return null;
    }

    String bundleName = toBundleName(baseName, locale);
    String resourceName = toResourceName(bundleName, format);
    URL url = loader.getResource(resourceName);
    if (url == null) {
        return null;
    }
    URLConnection connection = url.openConnection();
    if (connection == null) {
        return null;
    }
    if (reload) {
        connection.setUseCaches(false);
    }
    InputStream stream = connection.getInputStream();
    if (stream == null) {
        return null;
    }
    BufferedInputStream bis = new BufferedInputStream(stream);
    bundle = new XMLResourceBundle(bis);
    bis.close();

    return bundle;
}

From source file:de.hasait.genesis.base.util.GenesisUtils.java

public static void assertNotNull(final Object pValue) {
    if (pValue == null) {
        throw new NullPointerException();
    }// w ww . j  av  a2  s.c  om
}

From source file:com.milaboratory.primitivio.JSONSerializer.java

public JSONSerializer(Class<?> type) {
    if (type == null)
        throw new NullPointerException();
    this.type = type;
}