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

/**
 * Get all the matches for {@code string} compiled by {@code pattern}. If 
 * {@code isGlobal} is true, the return results will only include the 
 * group 0 matches. It is similar to string.match(regexp) in JavaScript.
 * /*from   ww w  .ja  v a 2  s . c  om*/
 * @param pattern the regexp
 * @param string the string
 * @param isGlobal similar to JavaScript /g flag
 * 
 * @return all matches
 */
public static String[] match(Pattern pattern, String string, boolean isGlobal) {
    if (pattern == null) {
        throw new NullPointerException("argument 'pattern' cannot be null");
    }
    if (string == null) {
        throw new NullPointerException("argument 'string' cannot be null");
    }

    List<String> matchesList = new ArrayList<String>();

    Matcher matcher = pattern.matcher(string);
    while (matcher.find()) {
        matchesList.add(matcher.group(0));
        if (!isGlobal) {
            for (int i = 1, iEnd = matcher.groupCount(); i <= iEnd; i++) {
                matchesList.add(matcher.group(i));
            }
        }
    }

    return matchesList.toArray(new String[matchesList.size()]);
}

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From source file:Main.java

public static byte[] encipherAes256(byte[] clearText, String keyString) throws NullPointerException {
    if (keyString == null || keyString.length() == 0) {
        throw new NullPointerException("Please give Password");
    }/*  w  w  w . ja  v a  2  s  .  co  m*/

    if (clearText == null || clearText.length <= 0) {
        throw new NullPointerException("Please give clearText");
    }

    try {
        SecretKeySpec skeySpec = getKey(keyString);

        // IMPORTANT TO GET SAME RESULTS ON iOS and ANDROID
        final byte[] iv = new byte[16];
        Arrays.fill(iv, (byte) 0x00);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        // Cipher is not thread safe
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivParameterSpec);

        return cipher.doFinal(clearText);

    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}

---

From source file:Main.java

@SuppressWarnings("deprecation")
static String getQueryString(List<Pair<String, String>> pairs) {
    StringBuilder queryBuilder = new StringBuilder();
    boolean first = true;
    for (Pair<String, String> pair : pairs) {
        // This will throw a NullPointerException if you call URLEncoder.encode(null).
        // Instead caught & thrown with description above.
        String value = pair.second;
        if (value == null) {
            // Can't be more specific without jeopardizing security.
            throw new NullPointerException("Malformed Request. Entry has null value for key: " + pair.first);
        }/*from w  ww  . ja  va2s  .  c o  m*/

        if (!first) {
            queryBuilder.append("&");
        }
        queryBuilder.append(pair.first);
        queryBuilder.append("=");
        try {
            queryBuilder.append(URLEncoder.encode(value, "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            // Fallback
            queryBuilder.append(URLEncoder.encode(value));
        }

        first = false;

    }

    return queryBuilder.toString();
}

---

From source file:Main.java

public static <T> void checkNotNull(T t, String message) {
    if (t == null)
        throw new NullPointerException(message);
}

---

From source file:ArrayUtil.java

/**
 * Determines if the passed object is of type array.
 * @param o The object to determine if it is an array.
 * @return true if the passed object is an array.
 * @throws NullPointerException when the passed object is null.
 *//*  w  w  w .ja va 2s  . c o m*/
public static boolean isArray(Object o) throws NullPointerException {
    if (o == null)
        throw new NullPointerException("Object is null: cannot determine if it is of array type.");
    else {
        return o.getClass().isArray();
    }
}

---

From source file:Main.java

public static <T> T assertNotNull(T reference, @Nullable Object errorMessage) {
    if (reference == null) {
        throw new NullPointerException(String.valueOf(errorMessage));
    }/*from  w w  w  .j  a  v  a 2  s .c o m*/
    return reference;
}

---

From source file:Main.java

/**
 * Inserts into an ascending sorted list an element.
 *
 * Preconditions: The element has to implement the {@code Comparable}
 * interface and the list have to be sorted ascending. Both conditions will
 * not be checked: At runtime a class cast exception will be thrown
 * if the element does not implement the comparable interface and and if the
 * list is not sorted, the element can't be insert sorted.
 *
 * @param <T>     element type/*from  w  w w. ja v  a 2s  .  c  o  m*/
 * @param list
 * @param element
 */
@SuppressWarnings("unchecked")
public static <T> void binaryInsert(LinkedList<? super T> list, T element) {
    if (list == null) {
        throw new NullPointerException("list == null");
    }

    if (element == null) {
        throw new NullPointerException("element == null");
    }

    boolean isComparable = element instanceof Comparable<?>;

    if (!isComparable) {
        throw new IllegalArgumentException("Not a comparable: " + element);
    }

    int size = list.size();
    int low = 0;
    int high = size - 1;
    int index = size;
    int cmp = 1;

    while ((low <= high) && (cmp > 0)) {
        int mid = (low + high) >>> 1;
        Comparable<? super T> midVal = (Comparable<? super T>) list.get(mid);

        cmp = midVal.compareTo(element);

        if (cmp < 0) {
            low = mid + 1;
        } else if (cmp > 0) {
            high = mid - 1;
        }
    }

    for (int i = low; (i >= 0) && (i < size) && (index == size); i++) {
        Comparable<? super T> elt = (Comparable<? super T>) list.get(i);

        if (elt.compareTo(element) >= 0) {
            index = i;
        }
    }

    list.add(index, element);
}

---

From source file:Main.java

/**
 * Creates a confirmation dialog that show a pop-up with button labeled as parameters labels.
 *
 * @param ctx                 {@link Activity} {@link Context}
 * @param message             Message to be shown in the dialog.
 * @param dialogClickListener For e.g./*from  w  w  w .  j  ava 2  s  . co  m*/
 *                            <p/>
 * @param positiveBtnLabel    For e.g. "Yes"
 * @param negativeBtnLabel    For e.g. "No"
 *
 */
public static void showDialog(Context ctx, String message, String positiveBtnLabel, String negativeBtnLabel,
        DialogInterface.OnClickListener dialogClickListener) {

    if (dialogClickListener == null) {
        throw new NullPointerException("Action listener cannot be null");
    }

    AlertDialog.Builder builder = new AlertDialog.Builder(ctx);

    builder.setMessage(message).setPositiveButton(positiveBtnLabel, dialogClickListener)
            .setNegativeButton(negativeBtnLabel, dialogClickListener).show();
}

---

From source file:Main.java

public static byte[] decipherAes256(byte[] encrypedPwdBytes, String password) throws NullPointerException {

    if (password == null || password.length() == 0) {
        throw new NullPointerException("Please give Password");
    }/*from w w  w  .  j  ava2  s  .c  o m*/

    if (encrypedPwdBytes == null || encrypedPwdBytes.length <= 0) {
        throw new NullPointerException("Please give encrypedPwdBytes");
    }

    try {
        SecretKey key = getKey(password);

        // IMPORTANT TO GET SAME RESULTS ON iOS and ANDROID
        final byte[] iv = new byte[16];
        Arrays.fill(iv, (byte) 0x00);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);

        // cipher is not thread safe
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        cipher.init(Cipher.DECRYPT_MODE, key, ivParameterSpec);
        byte[] decryptedValueBytes = (cipher.doFinal(encrypedPwdBytes));

        return decryptedValueBytes;

    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return null;
}

---

From source file:com.redhat.che.multitenant.UserCheTenantDataValidator.java

public static void validate(final UserCheTenantData data) {
    if (data == null) {
        LOG.error("'UserCheTenantData' can not be null");
        throw new NullPointerException("'UserCheTenantData' can not be null");
    } else if (StringUtils.isBlank(data.getClusterUrl())) {
        LOG.error("'ClusterUrl' can not be blank: {}", data);
        throw new IllegalArgumentException("'ClusterUrl' can not be blank");
    } else if (StringUtils.isBlank(data.getRouteBaseSuffix())) {
        LOG.error("'RouteBaseSuffix' can not be blank: {}", data);
        throw new IllegalArgumentException("'RouteBaseSuffix' can not be blank");
    } else if (StringUtils.isBlank(data.getNamespace())) {
        LOG.error("'Namespace' can not be blank: {}", data);
        throw new IllegalArgumentException("'Namespace' can not be blank");
    }// w w w  .j a va2s  .  c  o m
}

---

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