Constructor Detail

• NumberUtils

  public NumberUtils()

  Deprecated.

  NumberUtils instances should NOT be constructed in standard programming. Instead, the class should be used as NumberUtils.stringToInt("6");.

  This constructor is public to permit tools that require a JavaBean instance to operate.

Method Detail

• stringToInt

  public static int stringToInt​(String str)

  Deprecated.

  Convert a String to an int, returning zero if the conversion fails.

  Parameters:

  str - the string to convert

  Returns:

  the int represented by the string, or zero if conversion fails

• stringToInt

  public static int stringToInt​(String str,
                                int defaultValue)

  Deprecated.

  Convert a String to an int, returning a default value if the conversion fails.

  Parameters:

  str - the string to convert

  defaultValue - the default value

  Returns:

  the int represented by the string, or the default if conversion fails

• createNumber

  public static Number createNumber​(String val)
                             throws NumberFormatException

  Deprecated.

  Turns a string value into a java.lang.Number.

  First, the value is examined for a type qualifier on the end ('f','F','d','D','l','L'). If it is found, it starts trying to create successively larger types from the type specified until one is found that can hold the value.

  If a type specifier is not found, it will check for a decimal point and then try successively larger types from Integer to BigInteger and from Float to BigDecimal.

  If the string starts with 0x or -0x, it will be interpreted as a hexadecimal integer. Values with leading 0's will not be interpreted as octal.

  Parameters:

  val - String containing a number

  Returns:

  Number created from the string

  Throws:

  NumberFormatException - if the value cannot be converted

• createFloat

  public static Float createFloat​(String val)

  Deprecated.

  Convert a String to a Float.

  Parameters:

  val - a String to convert

  Returns:

  converted Float

  Throws:

  NumberFormatException - if the value cannot be converted

• createDouble

  public static Double createDouble​(String val)

  Deprecated.

  Convert a String to a Double.

  Parameters:

  val - a String to convert

  Returns:

  converted Double

  Throws:

  NumberFormatException - if the value cannot be converted

• createInteger

  public static Integer createInteger​(String val)

  Deprecated.

  Convert a String to a Integer, handling hex and octal notations.

  Parameters:

  val - a String to convert

  Returns:

  converted Integer

  Throws:

  NumberFormatException - if the value cannot be converted

• createLong

  public static Long createLong​(String val)

  Deprecated.

  Convert a String to a Long.

  Parameters:

  val - a String to convert

  Returns:

  converted Long

  Throws:

  NumberFormatException - if the value cannot be converted

• createBigInteger

  public static BigInteger createBigInteger​(String val)

  Deprecated.

  Convert a String to a BigInteger.

  Parameters:

  val - a String to convert

  Returns:

  converted BigInteger

  Throws:

  NumberFormatException - if the value cannot be converted

• createBigDecimal

  public static BigDecimal createBigDecimal​(String val)

  Deprecated.

  Convert a String to a BigDecimal.

  Parameters:

  val - a String to convert

  Returns:

  converted BigDecimal

  Throws:

  NumberFormatException - if the value cannot be converted

• minimum

  public static long minimum​(long a,
                             long b,
                             long c)

  Deprecated.

  Gets the minimum of three long values.

  Parameters:

  a - value 1

  b - value 2

  c - value 3

  Returns:

  the smallest of the values

• minimum

  public static int minimum​(int a,
                            int b,
                            int c)

  Deprecated.

  Gets the minimum of three int values.

  Parameters:

  a - value 1

  b - value 2

  c - value 3

  Returns:

  the smallest of the values

• maximum

  public static long maximum​(long a,
                             long b,
                             long c)

  Deprecated.

  Gets the maximum of three long values.

  Parameters:

  a - value 1

  b - value 2

  c - value 3

  Returns:

  the largest of the values

• maximum

  public static int maximum​(int a,
                            int b,
                            int c)

  Deprecated.

  Gets the maximum of three int values.

  Parameters:

  a - value 1

  b - value 2

  c - value 3

  Returns:

  the largest of the values

• compare

  public static int compare​(double lhs,
                            double rhs)

  Deprecated.

  Compares two doubles for order.

  This method is more comprehensive than the standard Java greater than, less than and equals operators.

  • It returns -1 if the first value is less than the second.
  • It returns +1 if the first value is greater than the second.
  • It returns 0 if the values are equal.

  The ordering is as follows, largest to smallest:

  • NaN
  • Positive infinity
  • Maximum double
  • Normal positive numbers
  • +0.0
  • -0.0
  • Normal negative numbers
  • Minimum double (-Double.MAX_VALUE)
  • Negative infinity

  Comparing NaN with NaN will return 0.

  Parameters:

  lhs - the first double

  rhs - the second double

  Returns:

  -1 if lhs is less, +1 if greater, 0 if equal to rhs

• compare

  public static int compare​(float lhs,
                            float rhs)

  Deprecated.

  Compares two floats for order.

  This method is more comprehensive than the standard Java greater than, less than and equals operators.

  • It returns -1 if the first value is less than the second.
  • It returns +1 if the first value is greater than the second.
  • It returns 0 if the values are equal.

  The ordering is as follows, largest to smallest:

  • NaN
  • Positive infinity
  • Maximum float
  • Normal positive numbers
  • +0.0
  • -0.0
  • Normal negative numbers
  • Minimum float (-Float.MAX_VALUE)
  • Negative infinity

  Comparing NaN with NaN will return 0.

  Parameters:

  lhs - the first float

  rhs - the second float

  Returns:

  -1 if lhs is less, +1 if greater, 0 if equal to rhs

• isDigits

  public static boolean isDigits​(String str)

  Deprecated.

  Checks whether the String contains only digit characters.

  Null and empty String will return false.

  Parameters:

  str - the String to check

  Returns:

  true if str contains only unicode numeric

• isNumber

  public static boolean isNumber​(String str)

  Deprecated.

  Checks whether the String a valid Java number.

  Valid numbers include hexadecimal marked with the 0x qualifier, scientific notation and numbers marked with a type qualifier (e.g. 123L).

  Null and empty String will return false.

  Parameters:

  str - the String to check

  Returns:

  true if the string is a correctly formatted number