java.lang
Class Integer

java.lang.Object
  java.lang.Integer

public final class Integer
extends Object

The 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 useful when dealing with an int.

Since:

JDK1.0

Field Summary

static int	MAX_VALUE A constant holding the maximum value an int can have, 231-1.
static int	MIN_VALUE A constant holding the minimum value an int can have, -231.

Constructor Summary

Integer()

Method Summary

static int	parseInt(String s) Parses the string argument as a signed decimal integer.
static String	toHexString(int i) Returns a string representation of the integer argument as an unsigned integer in base 16.
static String	toString(int i) Returns a String object representing the specified integer.

Methods inherited from class java.lang.Object

clone, equals, getClass, notifyAll, toString, wait

Field Detail

MIN_VALUE

public static final int MIN_VALUE

A constant holding the minimum value an int can have, -2³¹.

See Also:

Constant Field Values

MAX_VALUE

public static final int MAX_VALUE

A constant holding the maximum value an int can have, 2³¹-1.

See Also:

Constant Field Values

Constructor Detail

Integer

public Integer()

Method Detail

toHexString

public static String toHexString(int i)

Returns a string representation of the integer argument as an unsigned integer in base 16.

The unsigned integer value is the argument plus #if (CONFIG_VM_BUILD_32BIT==CONSTANT_TRUE) 2³² #else 2¹⁶ #endif 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 '\u0061' through '\u0066'.

Parameters:

i - an integer to be converted to a string.

Returns:

the string representation of the unsigned integer value represented by the argument in hexadecimal (base 16).

Since:

JDK1.0.2

toString

public static String toString(int i)

Returns a String object representing the specified integer. The argument is converted to signed decimal representation and returned as a string.

Parameters:

i - an integer to be converted.

Returns:

a string representation of the argument in base 10.

parseInt

public static int parseInt(String s)

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.

Parameters:

s - a String containing the int representation to be parsed

Returns:

the integer value represented by the argument in decimal or 0 if the string does not contain a parsable integer.