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Class java.lang.Float

java.lang.Object
   |
   +----java.lang.Number
           |
           +----java.lang.Float

public final class Float

extends Number

Version:

1.17, 18 May 1995

Author:

Lee Boynton, Arthur van Hoff

E

e = 2.718...

MAX_VALUE

The maximum value a float can have.

MIN_VALUE

The minimum value a float can have.

NEGATIVE_INFINITY

Negative inifinity.

PI

pi = 3.1415...

POSITIVE_INFINITY

Positive inifinity.

Float(float)

Constructs a wrapper for the given float value.

doubleValue()

Returns the double value

equals(Object)

Compares this object against some other object.

floatValue()

Returns the float value

hashCode()

Returns a hashcode for this float.

intValue()

Returns the integer value of this float (by casting to an int).

isInfinite(float)

Returns true if the number is infinitely large in magnitude.

isInfinite()

Returns true if this float value is infinitely large in magnitude.

isNan(float)

Returns true if the argument is the special Not-a-Number (NaN) value.

isNan()

Returns true if this float value is Not-a-Number (NaN).

longValue()

Returns the long value of this float (by casting to a long).

toString(float)

Returns a string representation for the specified float value.

toString()

Returns a string representation of this Float object.

valueOf(String)

Returns a floating point value that the string represents.

  public final static float POSITIVE_INFINITY

Positive inifinity.

  public final static float NEGATIVE_INFINITY

Negative inifinity.

  public final static float MAX_VALUE

The maximum value a float can have.

  public final static float MIN_VALUE

The minimum value a float can have.

  public final static float PI

pi = 3.1415...

  public final static float E

e = 2.718...

  public Float(float value)

Constructs a wrapper for the given float value.

Parameters:

value - the value of the Float

  public static String toString(float f)

Returns a string representation for the specified float value.

Parameters:

f - the float to be converted

Returns:

a string representing the value

valueOf

  public static Float valueOf(String s)

Returns a floating point value that the string represents.

Parameters:

s - the string that is to be parsed

Returns:

a float object representing the float value of the string

Throws: NumberFormatException

The string does not contain a parsable float

isNan

  public static boolean isNan(float v)

Returns true if the argument is the special Not-a-Number (NaN) value.

Parameters:

v - the value to be tested

Returns:

true if the value is NaN

isInfinite

  public static boolean isInfinite(float v)

Returns true if the number is infinitely large in magnitude.

Parameters:

v - the value to be tested

Returns:

true if the value is infinitely large in magnitude

isNan

  public boolean isNan()

Returns true if this float value is Not-a-Number (NaN).

isInfinite

  public boolean isInfinite()

Returns true if this float value is infinitely large in magnitude.

toString

  public String toString()

Returns a string representation of this Float object.

Returns:

a string representation this float

Overrides:

toString in class Object

intValue

  public int intValue()

Returns the integer value of this float (by casting to an int).

Overrides:

intValue in class Number

longValue

  public long longValue()

Returns the long value of this float (by casting to a long).

Overrides:

longValue in class Number

floatValue

  public float floatValue()

Returns the float value

Overrides:

floatValue in class Number

doubleValue

  public double doubleValue()

Returns the double value

Overrides:

doubleValue in class Number

hashCode

  public int hashCode()

Returns a hashcode for this float.

Overrides:

hashCode in class Object

equals

  public boolean equals(Object obj)

Compares this object against some other object. Note: To be useful in hashtables this method considers two Nan floating point values to be equal. This is not according to IEEE specification

Parameters:

obj - the object to compare with

Returns:

true if the object is the same

Overrides:

equals in class Object

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