| java.lang.Object
 java.lang.Integer
| Integer | | final public class Integer (Code) | | The Integer class wraps a value of the primitive type int
in an object. An object of type Integer contains a
single field whose type is int.
In addition, this class provides several methods for converting
an int to a String and a
String to an int, as well as other
constants and methods useful when dealing with an
int.
version:
12/17/01 (CLDC 1.1)
since:
JDK1.0, CLDC 1.0 |
| Field Summary | |
| final public static int | MAX_VALUE
The largest value of type int. | | final public static int | MIN_VALUE
The smallest value of type int. | | final static char[] | digits
|
| Constructor Summary | |
| public | Integer(int value)
Constructs a newly allocated Integer object that
represents the primitive int argument. |
| Method Summary | |
| public byte | byteValue()
Returns the value of this Integer as a byte. | | public double | doubleValue()
Returns the value of this Integer as a double. | | public boolean | equals(Object obj)
Compares this object to the specified object.
The result is true if and only if the argument is not
null and is an Integer object that contains
the same int value as this object.
Parameters:
obj - the object to compare with. | | public float | floatValue()
Returns the value of this Integer as a float. | | public int | hashCode()
Returns a hashcode for this Integer. | | public int | intValue()
Returns the value of this Integer as an int. | | public long | longValue()
Returns the value of this Integer as a long. | | public static int | parseInt(String s, int radix)
Parses the string argument as a signed integer in the radix
specified by the second argument. | | public static int | parseInt(String s)
Parses the string argument as a signed decimal integer. | | public short | shortValue()
Returns the value of this Integer as a short. | | public static String | toBinaryString(int i)
Creates a string representation of the integer argument as an
unsigned integer in base 2.
The unsigned integer value is the argument plus 232if
the argument is negative; otherwise it is equal to the argument.
This value is converted to a string of ASCII digits in binary
(base 2) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude
will not be the zero character. | | public static String | toHexString(int i)
Creates a string representation of the integer argument as an
unsigned integer in base 16.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in hexadecimal
(base 16) with no extra leading 0s. | | public static String | toOctalString(int i)
Creates a string representation of the integer argument as an
unsigned integer in base 8.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in octal
(base 8) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude will
not be the zero character. | | public static String | toString(int i, int radix)
Creates a string representation of the first argument in the
radix specified by the second argument.
If the radix is smaller than Character.MIN_RADIX or
larger than Character.MAX_RADIX, then the radix
10 is used instead.
If the first argument is negative, the first element of the
result is the ASCII minus character '-'
('\u002d'). | | public static String | toString(int i)
Returns a new String object representing the specified integer. | | public String | toString()
Returns a String object representing this Integer's value. | | public static Integer | valueOf(String s, int radix)
Returns a new Integer object initialized to the value of the
specified String. | | public static Integer | valueOf(String s)
Returns a new Integer object initialized to the value of the
specified String. |
| MAX_VALUE | | final public static int MAX_VALUE(Code) | | The largest value of type int. The constant
value of this field is 2147483647.
|
| MIN_VALUE | | final public static int MIN_VALUE(Code) | | The smallest value of type int. The constant
value of this field is -2147483648.
|
| digits | | final static char[] digits(Code) | | All possible chars for representing a number as a String
|
| Integer | | public Integer(int value)(Code) | | Constructs a newly allocated Integer object that
represents the primitive int argument.
Parameters:
value - the value to be represented by the Integer. |
| byteValue | | public byte byteValue()(Code) | | Returns the value of this Integer as a byte.
the value of this Integer as a byte.
since:
JDK1.1 |
| doubleValue | | public double doubleValue()(Code) | | Returns the value of this Integer as a double.
the int value represented by this object isconverted to type double and the result of theconversion is returned.
since:
CLDC 1.1 |
| equals | | public boolean equals(Object obj)(Code) | | Compares this object to the specified object.
The result is true if and only if the argument is not
null and is an Integer object that contains
the same int value as this object.
Parameters:
obj - the object to compare with. true if the objects are the same;false otherwise. |
| floatValue | | public float floatValue()(Code) | | Returns the value of this Integer as a float.
the int value represented by this object isconverted to type float and the result of theconversion is returned.
since:
CLDC 1.1 |
| hashCode | | public int hashCode()(Code) | | Returns a hashcode for this Integer.
a hash code value for this object, equal to theprimitive int value represented by thisInteger object. |
| intValue | | public int intValue()(Code) | | Returns the value of this Integer as an int.
the int value represented by this object. |
| longValue | | public long longValue()(Code) | | Returns the value of this Integer as a long.
the int value represented by this object that isconverted to type long and the result of theconversion is returned. |
| parseInt | | public static int parseInt(String s, int radix) throws NumberFormatException(Code) | | Parses the string argument as a signed integer in the radix
specified by the second argument. The characters in the string
must all be digits of the specified radix (as determined by
whether
java.lang.Character.digit(charint) returns a
nonnegative value), except that the first character may be an
ASCII minus sign '-' ('\u002d') to
indicate a negative value. The resulting integer value is returned.
An exception of type NumberFormatException is thrown if any
of the following situations occurs:
- The first argument is null or is a string of length zero.
- The radix is either smaller than
java.lang.Character.MIN_RADIX or
larger than
java.lang.Character.MAX_RADIX .
- Any character of the string is not a digit of the specified radix,
except that the first character may be a minus sign '-'
('\u002d') provided that the string is longer than length 1.
- The integer value represented by the string is not a value of type
int.
Examples:
parseInt("0", 10) returns 0
parseInt("473", 10) returns 473
parseInt("-0", 10) returns 0
parseInt("-FF", 16) returns -255
parseInt("1100110", 2) returns 102
parseInt("2147483647", 10) returns 2147483647
parseInt("-2147483648", 10) returns -2147483648
parseInt("2147483648", 10) throws a NumberFormatException
parseInt("99", 8) throws a NumberFormatException
parseInt("Kona", 10) throws a NumberFormatException
parseInt("Kona", 27) returns 411787
Parameters:
s - the String containing the integer.
Parameters:
radix - the radix to be used. the integer represented by the string argument in thespecified radix.
exception:
NumberFormatException - if the string does not contain aparsable integer. |
| parseInt | | public static int parseInt(String s) throws NumberFormatException(Code) | | Parses the string argument as a signed decimal integer. The
characters in the string must all be decimal digits, except that
the first character may be an ASCII minus sign '-'
('\u002d') to indicate a negative value. The resulting
integer value is returned, exactly as if the argument and the radix
10 were given as arguments to the
Integer.parseInt(java.lang.String,int) method.
Parameters:
s - a string. the integer represented by the argument in decimal.
exception:
NumberFormatException - if the string does not contain aparsable integer. |
| shortValue | | public short shortValue()(Code) | | Returns the value of this Integer as a short.
the value of this Integer as a short.
since:
JDK1.1 |
| toBinaryString | | public static String toBinaryString(int i)(Code) | | Creates a string representation of the integer argument as an
unsigned integer in base 2.
The unsigned integer value is the argument plus 232if
the argument is negative; otherwise it is equal to the argument.
This value is converted to a string of ASCII digits in binary
(base 2) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude
will not be the zero character. The characters '0'
('\u0030') and '1' ('\u0031') are used
as binary digits.
Parameters:
i - an integer. the string representation of the unsigned integer valuerepresented by the argument in binary (base 2).
since:
JDK1.0.2 |
| toHexString | | public static String toHexString(int i)(Code) | | Creates a string representation of the integer argument as an
unsigned integer in base 16.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in hexadecimal
(base 16) with no extra leading 0s. If the
unsigned magnitude is zero, it is represented by a single zero
character '0' ('\u0030'); otherwise, the first
character of the representation of the unsigned magnitude will
not be the zero character. The following characters are used as
hexadecimal digits:
0123456789abcdef
These are the characters '\u0030' through '\u0039'
and 'u\0039' through '\u0066'.
Parameters:
i - an integer. the string representation of the unsigned integer valuerepresented by the argument in hexadecimal (base 16).
since:
JDK1.0.2 |
| toOctalString | | public static String toOctalString(int i)(Code) | | Creates a string representation of the integer argument as an
unsigned integer in base 8.
The unsigned integer value is the argument plus 232 if
the argument is negative; otherwise, it is equal to the argument.
This value is converted to a string of ASCII digits in octal
(base 8) with no extra leading 0s.
If the unsigned magnitude is zero, it is represented by a single
zero character '0' ('\u0030'); otherwise, the
first character of the representation of the unsigned magnitude will
not be the zero character. The octal digits are:
01234567
These are the characters '\u0030' through '\u0037'.
Parameters:
i - an integer the string representation of the unsigned integer valuerepresented by the argument in octal (base 8).
since:
JDK1.0.2 |
| toString | | public static String toString(int i, int radix)(Code) | | Creates a string representation of the first argument in the
radix specified by the second argument.
If the radix is smaller than Character.MIN_RADIX or
larger than Character.MAX_RADIX, then the radix
10 is used instead.
If the first argument is negative, the first element of the
result is the ASCII minus character '-'
('\u002d'). If the first
argument is not negative, no sign character appears in the result.
The remaining characters of the result represent the magnitude of
the first argument. If the magnitude is zero, it is represented by
a single zero character '0' ('\u0030'); otherwise,
the first character of the representation of the magnitude will
not be the zero character.
The following ASCII characters are used as digits:
0123456789abcdefghijklmnopqrstuvwxyz
These are '\u0030' through '\u0039' and
'\u0061' through '\u007a'. If the
radix is N, then the first N of these
characters are used as radix-N digits in the order shown.
Thus, the digits for hexadecimal (radix 16) are
0123456789abcdef.
Parameters:
i - an integer.
Parameters:
radix - the radix. a string representation of the argument in the specified radix.
See Also: java.lang.Character.MAX_RADIX
See Also: java.lang.Character.MIN_RADIX |
| toString | | public static String toString(int i)(Code) | | Returns a new String object representing the specified integer. The
argument is converted to signed decimal representation and returned
as a string, exactly as if the argument and radix 10 were
given as arguments to the
Integer.toString(int,int) method.
Parameters:
i - an integer to be converted. a string representation of the argument in base 10. |
| toString | | public String toString()(Code) | | Returns a String object representing this Integer's value. The
value is converted to signed decimal representation and returned
as a string, exactly as if the integer value were given as an
argument to the
java.lang.Integer.toString(int) method.
a string representation of the value of this object inbase 10. |
| valueOf | | public static Integer valueOf(String s, int radix) throws NumberFormatException(Code) | | Returns a new Integer object initialized to the value of the
specified String. The first argument is interpreted as representing
a signed integer in the radix specified by the second argument,
exactly as if the arguments were given to the
Integer.parseInt(java.lang.String,int) method. The result is an
Integer object that represents the integer value
specified by the string.
In other words, this method returns an Integer object
equal to the value of:
new Integer(Integer.parseInt(s, radix))
Parameters:
s - the string to be parsed.
Parameters:
radix - the radix of the integer represented by strings a newly constructed Integer initialized to thevalue represented by the string argument in the specifiedradix.
exception:
NumberFormatException - if the String cannot beparsed as an int. |
| valueOf | | public static Integer valueOf(String s) throws NumberFormatException(Code) | | Returns a new Integer object initialized to the value of the
specified String. The argument is interpreted as representing a
signed decimal integer, exactly as if the argument were given to
the
Integer.parseInt(java.lang.String) method. The result is an
Integer object that represents the integer value specified
by the string.
In other words, this method returns an Integer object equal
to the value of:
new Integer(Integer.parseInt(s))
Parameters:
s - the string to be parsed. a newly constructed Integer initialized to thevalue represented by the string argument.
exception:
NumberFormatException - if the string cannot be parsedas an integer. |
|
|