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Java Integer Class

The Java Integer class comes under the Java.lang.Number package. This class wraps a value of the primitive type int in an object. An object of Integer class contains a single field of type int value.

Java Integer Methods

The Java Integer class provides several methods for converting an int to a String and a String to an int, as well as other constants and methods dealing with an int. The various Java Integer methods are as follows:

SN	Modifier & Type	Method	Discription
1)	static int	bitCount()	It returns the number of 1-bits in the 2’s complement binary representation of the specified int value.
2)	byte	byteValue()	It converts the given number into a primitive byte type and returns the value of integer object as byte.
3)	Static int	compare()	It compares two int values numerically and returns the result in integer equivalent.
4)	Int	compareTo()	It compares two integer objects numerically and returns the result as -1, 0 or 1.
5)	static int	compareUnsigned()	It compares two integer objects numerically treating the values as unsigned and returns the result as -1, 0 or 1.
6)	static Integer	decode()	It decodes a String object into an Integer value.
7)	static int	divideUnsigned()	It returns the unsigned quotient of dividing the first argument by the second argument where each argument and the result is interpreted as an unsigned value.
8)	double	doubleValue()	It converts the given Integer value and returns the result as a double equivalent.
9)	boolean	equals()	It compares the value of the parameter to the value of the current Integer object and returns boolean ( True or False ).
10)	float	floatValue()	It converts the given Integer value and returns the result as a float equivalent.
11)	Static Integer	getInteger()	It determines the integer value of the system property with the specified name.
12)	static int	hashCode()	It returns a hash code for the given Integer.
13)	static int	highestOneBit()	It returns int value with at most a single one-bit, in the position of the highest-order (“leftmost”) one-bit in the specified int value.
14)	static int	lowestOneBit()	It eturns int value with at most a single one-bit, in the position of the lowest-order (“rightmost”) one-bit in the specified int value.
15)	static int	max()	It returns the maximum value amongst the two method argument.
16)	static int	min()	It returns the minimum value amongst the two method argument.
17)	int	intValue()	It returns the value of the specified number as an int.
18)	long	longValue()	It returns the value of the specified long object as long equivalent.
19)	static int	numberOfLeadingZeros()	It returns the total number of zero bits preceding the highest-order (“leftmost”) one-bit in the 2’s complement binary representation of the specified int value.
20)	static int	numberOfTrailingZeros()	It returns the total number of zero bits following the lowest-order (“rightmost”) one-bit in the 2’s complement binary representation of the specified int value.
21)	static int	parseInt()	It parses the String argument as a signed decimal Integer object.
22)	static int	parseUnsignedInt()	It parses the String argument as an unsigned decimal Integer object.
23)	static int	remainderUnsigned()	It returns the unsigned remainder from dividing the first argument by the second argument where each argument and the result is interpreted as an unsigned value.
24)	static int	reverse()	It returns the value obtained by reversing the order of the bits in the 2’s complement binary representation of the specified int value.
25)	static int	reverseBytes()	It returns the value obtained by reversing the order of the bytes in the 2’s complement binary representation of the specified int value.
26)	static int	rotateLeft()	It returns the value obtained by rotating the 2’s complement binary representation of the specified int value left by the specified number of bits.
27)	static int	rotateRight()	It returns the value obtained by rotating the 2’s complement binary representation of the specified int value right by the specified number of bits.
28)	short	shortValue()	It returns the value of this Integer as a short type after a primitive conversion.
29)	static int	signum()	It returns the signum function of the specified int value.
30)	static int	sum()	It returns the sum by adding two integers together as per the + operator.
31)	static String	toBinaryString()	It returns a string representation of the integer argument as an unsigned integer in binary base 2.
32)	static String	toHexString()	It returns a string representation of the integer argument as an unsigned integer in binary base 16.
33)	static String	toOctalString()	It returns a string representation of the integer argument as an unsigned integer in binary base 8.
34)	String	toString()	It returns a String object representing the value of the Number Object.
35)	static String	toUnsignedString()	It converts the argument to a long by an unsigned conversion.
36)	static long	toUnsignedLong()	It returns a string representation of the argument as an unsigned decimal value.
37)	static Integer	valueOf()	It returns the relevant Integer Object holding the value of the argument passed.