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

public static <E> LinkedHashSet<E> newLinkedHashSet(E... elements) {
    if (elements == null) {
        throw new NullPointerException();
    }//  www. ja  v a  2  s. c om
    return new LinkedHashSet<E>(Arrays.asList(elements));
}

From source file:Main.java

public static int readInputStream(InputStream input, byte[] buffer, int offset, int length) throws Exception {
    int n, o;/*from  w ww  . ja v  a  2 s .c o  m*/

    if (buffer == null)
        throw new NullPointerException();
    if (offset < 0 || length < 0 || offset + length > buffer.length)
        throw new IndexOutOfBoundsException();
    if (length == 0)
        return 0;

    if ((n = input.read(buffer, offset++, 1)) < 0)
        return -1;

    if (--length > 0 && (o = input.available()) > 0) {
        n += input.read(buffer, offset, o > length ? length : o);
    }

    return n;
}

From source file:Main.java

public static <E> ArrayList<E> newArrayList(Iterable<E> iterable) {
    if (iterable == null) {
        throw new NullPointerException();
    }/* ww w.  j a v  a 2  s  .  c  o  m*/
    ArrayList<E> list = new ArrayList<E>();
    for (Iterator<E> i = iterable.iterator(); i.hasNext();) {
        list.add(i.next());
    }
    return list;
}

From source file:Main.java

/**
 * @param object//from ww  w  .  java 2  s  .  c o m
 * @return
 */
public static final boolean isObjectNull(Object object) {
    try {
        if (object != null) {
            return true;
        } else {
            throw new NullPointerException();
        }
    } catch (NullPointerException ne) {
        ne.printStackTrace();
        return false;
    }
}

From source file:Main.java

public static boolean isFirstUpperCase(String target) throws NullPointerException {
    if (target == null)
        throw new NullPointerException();
    final char c = target.charAt(0);
    for (int i = 0, size = UpperCases.length; i < size; i++) {
        if (UpperCases[i] == c) {
            return true;
        }/*from   w  w  w.j  a  va 2 s  .  com*/
    }
    return false;
}

From source file:Main.java

public static void appendElementText(Element parentElement, String elementName, String elementValue) {

    if (parentElement == null || elementName == null || elementValue == null)
        throw new NullPointerException();

    Element childElement = parentElement.getOwnerDocument().createElement(elementName);
    setTextContent(childElement, elementValue);
    parentElement.appendChild(childElement);
}

From source file:Main.java

public static <T> T checkNotNull(T value) {
    if (value == null) {
        throw new NullPointerException();
    }// ww w .j  a  v  a  2  s  .  c o m
    return value;
}

From source file:Main.java

public static String getElementText(Element parentElement, String elementName) {

    if (parentElement == null || elementName == null)
        throw new NullPointerException();

    Element childElement = (Element) parentElement.getElementsByTagName(elementName).item(0);
    return getTextContent(childElement);
}

From source file:Main.java

public static void addFragmentToActivity(FragmentManager fragmentManager, Fragment fragment, int frameId) {

    if (fragmentManager == null || fragment == null) {
        throw new NullPointerException();
    }//w w w  .  ja  va2  s  .c  om

    FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.add(frameId, fragment);
    transaction.commit();
}

From source file:Main.java

/**
 * Ensures that an object reference passed as a parameter to the calling method is not null.
 *
 * @param reference an object reference/*ww  w .  j a  v  a  2 s  .com*/
 * @return the non-null reference that was validated
 * @throws NullPointerException if {@code reference} is null
 */
public static <T> T checkNotNull(final T reference) {
    if (reference == null) {
        throw new NullPointerException();
    }
    return reference;
}