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:Main.java

/**
 * Calculates a value case insensitive hash code for a String v String map. Method placed here to
 * reduce .NET translation overhead/*w  w w.j av  a  2s. co m*/
 * @param map
 * @return
 */
public static int calculateCaseInsensitiveValueStringVsStringMapHash(Map<String, String> map) {
    if (map == null) {
        throw new NullPointerException();
    }

    int result = 0;
    Iterator<Map.Entry<String, String>> iter = map.entrySet().iterator();

    while (iter.hasNext()) {
        Map.Entry<String, String> next = iter.next();
        int entryHash = (next.getKey() == null ? 0 : next.getKey().hashCode())
                ^ (next.getValue() == null ? 0 : next.getValue().toLowerCase().hashCode());
        result += entryHash;
    }
    return result;
}

From source file:Main.java

public static void checkCollectionDoesNotContainNull(final Collection<?> collection) {
    boolean containsNull = false;

    try {/*from  w ww . jav a  2 s  .  c  om*/
        containsNull = collection.contains(null);
    } catch (NullPointerException ex) {
        // Not a problem.
    }

    if (containsNull) {
        throw new NullPointerException();
    }
}

From source file:Main.java

public static <T> T checkNotNull(T reference) {
    if (reference == null) {
        throw new NullPointerException();
    }//w  w w . j  a v a2 s . co m
    return reference;
}

From source file:Main.java

public static void setTextContent(Node node, String nodeValue) {

    if (node == null || nodeValue == null)
        throw new NullPointerException();

    node.appendChild(node.getOwnerDocument().createTextNode(xmlEncode(nodeValue)));
}

From source file:Main.java

public static <T> T checkNotNull(T object) {
    if (object == null)
        throw new NullPointerException();
    return object;
}

From source file:Main.java

public static Node parseXML(String text) throws SAXException, ParserConfigurationException, IOException {
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder parser = dbf.newDocumentBuilder();
    InputSource source = new InputSource(new StringReader(text));
    Document doc = parser.parse(source);
    if (doc == null) {
        throw new NullPointerException();
    }//from   ww  w  . j  av  a2 s .co m

    return doc.getFirstChild();
}

From source file:Main.java

/**
 * Set the drawable to a specific color and return it
 * @param drawable The drawable to change
 * @param colorToSet The color to set it to
 * @return Drawable//  w  w w.  j a  v  a 2  s  .c  o  m
 * @throws NullPointerException, if it fails, throws a null pointer
 */
public static Drawable colorDrawable(Drawable drawable, int colorToSet) {
    try {
        drawable.mutate().setColorFilter(colorToSet, PorterDuff.Mode.MULTIPLY);
        return drawable;
    } catch (Exception e) {
        e.printStackTrace();
        throw new NullPointerException();
    }
}

From source file:Main.java

public static <E> ArrayList<E> arrayAsList(final E[] array, final int start, final int end) {
    if (array == null) {
        throw new NullPointerException();
    }/* ww w  .j a  v  a 2  s  . c  o  m*/
    if (start < 0 || start > end || end > array.length) {
        throw new IllegalArgumentException();
    }

    final ArrayList<E> list = new ArrayList<>(end - start);
    for (int i = start; i < end; i++) {
        list.add(array[i]);
    }
    return list;
}

From source file:Main.java

public static boolean isAllNullArray(Object array) {
    if (array == null) {
        throw new NullPointerException();
    }//from w w w .  j a v  a 2s  .  co  m
    if (!array.getClass().isArray()) {
        throw new IllegalArgumentException("Expected array but received " + array.getClass());
    }
    for (int i = 0; i < Array.getLength(array); i++) {
        if (Array.get(array, i) != null) {
            return false;
        }
    }
    return true;
}

From source file:com.laxser.blitz.util.BlitzStringUtil.java

public static String relativePathToModulePath(String relativePath) {
    if (relativePath == null) {
        throw new NullPointerException();
    }//from  w  w w  . ja va  2  s  .c  o  m
    if (relativePath.length() == 0) {
        return "";
    }
    return StringUtils.removeEnd("/" + relativePath, "/");
}