Package io.keikai.doc.collab.lib0

Class Number

java.lang.Object

io.keikai.doc.collab.lib0.Number

public class Number
extends Object

Number Utility

Field Summary

Fields

Modifier and Type	Field	Description
static final int	HIGHEST_INT31
static final long	HIGHEST_UINT32
static final int	LOWEST_INT31
static final long	MAX_SAFE_INTEGER
static final long	MIN_SAFE_INTEGER

Method Summary

Modifier and Type	Method	Description
static int	countBits(int n)	Counts the number of "1" bits in an unsigned 32-bit number.
static boolean	isInteger(double num)	Checks if a number is an integer.
static boolean	isNaN(double num)	Checks if a value is NaN.
static int	parseInt(String str, int radix)	Parses a string into an integer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

MAX_SAFE_INTEGER

public static final long MAX_SAFE_INTEGER

See Also:

• Constant Field Values

MIN_SAFE_INTEGER

public static final long MIN_SAFE_INTEGER

See Also:

• Constant Field Values

LOWEST_INT31

public static final int LOWEST_INT31

See Also:

• Constant Field Values

HIGHEST_INT31

public static final int HIGHEST_INT31

See Also:

• Constant Field Values

HIGHEST_UINT32

public static final long HIGHEST_UINT32

See Also:

• Constant Field Values

Method Details

isInteger

public static boolean isInteger(double num)

Checks if a number is an integer.

Parameters:

num - The number to check.

Returns:

True if the number is an integer, false otherwise.

isNaN

public static boolean isNaN(double num)

Checks if a value is NaN.

Parameters:

num - The value to check.

Returns:

True if the value is NaN, false otherwise.

parseInt

public static int parseInt(String str,
 int radix)

Parses a string into an integer.

Parameters:

str - The string to parse.

radix - The radix to use (e.g., 10 for decimal, 16 for hexadecimal).

Returns:

The parsed integer.

countBits

public static int countBits(int n)

Counts the number of "1" bits in an unsigned 32-bit number. This uses Brian Kernighan's algorithm.

Parameters:

n - The number to count bits in.

Returns:

The number of "1" bits.