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:Main.java

public static Context getContext() {
    if (sContext != null)
        return sContext;
    throw new NullPointerException("u should init first");
}

From source file:Main.java

public static NdefRecord createTextRecord(String text, Locale locale, boolean encodeInUtf8) {
    if (text == null) {
        throw new NullPointerException("text is MUST require!!");
    }/*  ww  w.  j ava  2 s .com*/
    if (locale == null) {
        throw new NullPointerException("locale is MUST require!!");
    }

    byte[] langBytes = locale.getLanguage().getBytes(Charset.forName("US-ASCII"));

    Charset utfEncoding = encodeInUtf8 ? Charset.forName("UTF-8") : Charset.forName("UTF-16");
    text = convertToCrlf(text);
    byte[] textBytes = text.getBytes(utfEncoding);

    int utfBit = encodeInUtf8 ? 0 : (1 << 7);
    char status = (char) (utfBit + langBytes.length);

    byte[] data = bytesConcat(new byte[] { (byte) status }, langBytes, textBytes);

    return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], data);
}

From source file:Main.java

private static <T> void checkIsNull(List<T> collection) {
    if (collection == null) {
        throw new NullPointerException("The supplied collection is null.");
    }//from   ww w  .j av  a  2 s .c  o  m
}

From source file:Main.java

/**
 * Test whether the {@code string} has at least one match by 
 * {@code pattern}.//from   www .ja  v a 2  s  .c  om
 * 
 * @param pattern the regexp
 * @param string the string to test
 * 
 * @return true if at least one match, false if no match
 */
public static boolean test(Pattern pattern, String string) {
    if (pattern == null) {
        throw new NullPointerException("argument 'pattern' cannot be null");
    }
    if (string == null) {
        throw new NullPointerException("argument 'string' cannot be null");
    }
    return pattern.matcher(string).find();
}

From source file:Main.java

/**
 * Determines whether specified type is supported as attributes data or for text-based
 * node property./*from ww  w .  j  ava 2s .c  om*/
 * @param type Type that needs to be checked.
 * @return true if and only if type is supported as attributed type.
 */
public static boolean isSupportedAttributeClass(Class<?> type) {
    if (type == null)
        throw new NullPointerException("Type can not be null.");

    if (type.isPrimitive())
        return true;

    return (supportedAttrTypes.contains(type));
}

From source file:Main.java

/**
 * Converts a string to his binary equivalent.
 *
 * @param text The string that must be converted, cannot be null
 * @return An array of integers representing the binary equivalent
 *//*  www .jav a2  s  .  c  om*/
public static int[] getBinarySequence(String text) {

    if (text == null) {
        throw new NullPointerException("Given text cannot be null");
    }

    char[] textArray = text.toCharArray();
    int[] bitList = new int[textArray.length * UTF8_SIZE];
    int bitListPtr = 0;

    for (char asciiValue : textArray) {

        for (int bitWise = UTF8_SIZE - 1; bitWise >= 0; bitWise--) {
            int tempBit = ((asciiValue & (1 << bitWise)) > 0) ? 1 : 0;

            bitList[bitListPtr] = tempBit;
            bitListPtr++;
        }
    }

    return bitList;
}

From source file:Main.java

/**
 * Creates and returns an unmodifiable List that wraps the given array.
 * Changes to the array will be reflected in the List.
 * @param arr The array to wrap as a List
 * @return an unmodifiable List that wraps the array
 * @throws NullPointerException if the array is null
 *//*from w  w w. j  ava 2  s.  c o m*/
public static List<Double> listFromDoubleArray(final double[] arr) {
    if (arr == null)
        throw new NullPointerException("array cannot be null");
    return new AbstractList<Double>() {
        @Override
        public Double get(int index) {
            return arr[index];
        }

        @Override
        public int size() {
            return arr.length;
        }
    };
}

From source file:Main.java

public static <E> ArrayList<E> copyNullSafeMutableList(Collection<? extends E> list) {
    if (list == null)
        throw new NullPointerException("list");

    ArrayList<E> result = new ArrayList<E>(list);
    for (E element : result) {
        if (element == null)
            throw new NullPointerException("element");
    }//from w ww. j a va 2s  .c  o m
    return result;
}

From source file:Main.java

/****
 * Remove audio file that is existing on the device.
 * //from   w w w  .j  a  v  a2  s  .  co m
 * @param ctx
 *            {@link Context}
 * @param uri
 *            {@link Uri} of the audio file
 * 
 * @throws NullPointerException
 *             if the Uri parameter is null
 * */
public static boolean removeAudio(Context ctx, Uri uri) {

    if (uri == null) {
        throw new NullPointerException("Uri cannot be null");
    }

    return (ctx.getContentResolver().delete(uri, null, null) != 0);
}

From source file:Main.java

/**
 * Returns a list of strings from al collection of arbitrary objects.
 *
 * Uses the <code>toString()</code> operation of every collection element.
 * Null elements set to null in the list.
 *
 * @param  coll collection/*from w ww.jav a 2s .  c  o  m*/
 * @return      list of strings
 */
public static List<String> toStringList(Collection<?> coll) {
    if (coll == null) {
        throw new NullPointerException("coll == null");
    }

    List<String> list = new ArrayList<>(coll.size());

    for (Object o : coll) {
        if (o == null) {
            list.add(null);
        } else {
            list.add(o.toString());
        }
    }

    return list;
}