Methods for the integer class in Java __integer

Java.lang
class Integer

Java.lang.Object

Java.lang.Number

Java.lang.Integer

all implemented interfaces:

Serializable, comparable<integer>

Public final class Integer

Extends number

Implements Comparable<integer>

The Integer class wraps a value of the base type int in the object. An object of type Integer contains a field of type int.

In addition, the class provides several methods for converting between type int and String, as well as other constants and methods that are useful when dealing with int types.

Implementation considerations: The implementation of the "bit twiddling" method (such as Highestonebit and Numberoftrailingzeros) is based on Henry S. Warren, Jr. Writing "Hacker ' s Delight" (Addison Wesley, 2002) Some of the relevant materials.

start with the following version:

JDK1.0

See also:

Serializing a table

field summary /td>
Static int	max_value    ;         A constant that retains the maximum value of type int is a value of 231-1.
Static int	min_value            constants that hold the minimum value of type int are the desirable value of-231.
Static int	SIZE &nb sp;          represents the number of digits in the int value in binary complement form.
Static class<integer>	type< /strong>            represents a Class instance of the base type int.

Construction Method Summary
Integer (int value) Constructs a newly allocated Integer object that represents the specified int value.
Integer (String s) Constructs a newly allocated Integer object that represents the int value indicated by the String parameter.

Method Summary
static int	Bitcount (int i) Returns the number of 1 digits in the binary complement representation of the specified int value.
Byte	Bytevalue () Returns the value of the Integer in the byte type.
Int	CompareTo (Integer Anotherinteger) Compares two Integer objects on a number.
Static Integer	Decode (String nm) Decodes a String to Integer.
Double	Doublevalue () Returns the value of the Integer with the double type.
Boolean	equals (Object obj) Compares this object with the specified object.
Float	Floatvalue () Returns the value of the Integer, in float type.
Static Integer	Getinteger (String nm) Determines the integer value of the system property with the specified name.
Static Integer	Getinteger (String nm, int val) Determines the integer value of the system property with the specified name.
Static Integer	Getinteger (String nm, Integer val) Returns the integer value of the system property with the specified name.
Int	hashcode () Returns the hash code for this Integer.
static int	Highestonebit (int i) Returns the position of the 1-bit of the highest (leftmost) value in the specified int value, with a maximum of 1 bits of int.
Int	Intvalue () Returns the value of the Integer as an int type.
Long	Longvalue () Returns the value of the Integer in a long type.
static int	Lowestonebit (int i) Returns the 1-bit position of the lowest bit (rightmost) in the specified int value, with a maximum of 1 bits of int value.
static int	Numberofleadingzeros (int i) Returns the number of 0 bits before specifying the top (leftmost) 1 digits in the binary complement representation of the int value.
static int	Numberoftrailingzeros (int i) Returns the number of 0 digits after the lowest ("right") 1 digit in the binary complement representation of the specified int value.
static int	parseint (String s) Parse the string argument as a signed decimal integer.
static int	parseint (String s, int radix) Resolves a string parameter to a signed integer using the cardinality specified by the second parameter.
static int	Reverse (int i) Returns the value obtained by reversing the order of the median in the form of the binary complement of the specified int value.
static int	reversebytes (int i) Returns the value obtained by reversing the order of bytes in the form of the binary complement of the specified int value.
static int