Class java.lang.Float 
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Class java.lang.Float 

java.lang.Object
   |
   +----java.lang.Number
           |
           +----java.lang.Float
public final class Float
extends Number
The Float class provides an object wrapper for Float data values, and serves as a place for float-oriented operations. A wrapper is useful because most of Java's utility classes require the use of objects. Since floats are not objects in Java, they need to be "wrapped" in a Float instance.

Variable Index

o MAX_VALUE
The maximum value a float can have.
o MIN_VALUE
The minimum value a float can have.
o NEGATIVE_INFINITY
Negative infinity.
o NaN
Not-a-Number.
o POSITIVE_INFINITY
Positive infinity.

Constructor Index

o Float(float)
Constructs a Float wrapper for the specified float value.
o Float(double)
Constructs a Float wrapper for the specified double value.
o Float(String)
Constructs a Float object initialized to the value specified by the String parameter.

Method Index

o doubleValue()
Returns the double value of this Float.
o equals(Object)
Compares this object against some other object.
o floatToIntBits(float)
Returns the bit represention of a single-float value
o floatValue()
Returns the float value of this Float object.
o hashCode()
Returns a hashcode for this Float.
o intBitsToFloat(int)
Returns the single-float corresponding to a given bit represention.
o intValue()
Returns the integer value of this Float (by casting to an int).
o isInfinite(float)
Returns true if the specified number is infinitely large in magnitude.
o isInfinite()
Returns true if this Float value is infinitely large in magnitude.
o isNaN(float)
Returns true if the specified number is the special Not-a-Number (NaN) value.
o isNaN()
Returns true if this Float value is Not-a-Number (NaN).
o longValue()
Returns the long value of this Float (by casting to a long).
o toString(float)
Returns a String representation for the specified float value.
o toString()
Returns a String representation of this Float object.
o valueOf(String)
Returns the floating point value represented by the specified String.

Variables

o POSITIVE_INFINITY 
  public final static float POSITIVE_INFINITY
Positive infinity.
o NEGATIVE_INFINITY 
  public final static float NEGATIVE_INFINITY
Negative infinity.
o NaN 
  public final static float NaN
Not-a-Number. Note: is not equal to anything, including itself
o MAX_VALUE 
  public final static float MAX_VALUE
The maximum value a float can have. The largest maximum value possible is 3.40282346638528860e+38.
o MIN_VALUE 
  public final static float MIN_VALUE
The minimum value a float can have. The lowest minimum value possible is 1.40129846432481707e-45.

Constructors

o Float 
  public Float(float value)
Constructs a Float wrapper for the specified float value.
Parameters:
value - the value of the Float
o Float 
  public Float(double value)
Constructs a Float wrapper for the specified double value.
Parameters:
value - the value of the Float
o Float 
  public Float(String s) throws NumberFormatException
Constructs a Float object initialized to the value specified by the String parameter.
Parameters:
s - the String to be converted to a Float
Throws: NumberFormatException
If the String does not contain a parsable number.

Methods

o toString 
  public static String toString(float f)
Returns a String representation for the specified float value.
Parameters:
f - the float to be converted
o valueOf 
  public static Float valueOf(String s) throws NumberFormatException
Returns the floating point value represented by the specified String.
Parameters:
s - the String to be parsed
Throws: NumberFormatException
If the String does not contain a parsable Float.
o isNaN 
  public static boolean isNaN(float v)
Returns true if the specified number is the special Not-a-Number (NaN) value.
Parameters:
v - the value to be tested
o isInfinite 
  public static boolean isInfinite(float v)
Returns true if the specified number is infinitely large in magnitude.
Parameters:
v - the value to be tested
o isNaN 
  public boolean isNaN()
Returns true if this Float value is Not-a-Number (NaN).
o isInfinite 
  public boolean isInfinite()
Returns true if this Float value is infinitely large in magnitude.
o toString 
  public String toString()
Returns a String representation of this Float object.
Overrides:
toString in class Object
o intValue 
  public int intValue()
Returns the integer value of this Float (by casting to an int).
Overrides:
intValue in class Number
o longValue 
  public long longValue()
Returns the long value of this Float (by casting to a long).
Overrides:
longValue in class Number
o floatValue 
  public float floatValue()
Returns the float value of this Float object.
Overrides:
floatValue in class Number
o doubleValue 
  public double doubleValue()
Returns the double value of this Float.
Overrides:
doubleValue in class Number
o hashCode 
  public int hashCode()
Returns a hashcode for this Float.
Overrides:
hashCode in class Object
o 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 objects are the same; false otherwise.
Overrides:
equals in class Object
o floatToIntBits 
  public static int floatToIntBits(float value)
Returns the bit represention of a single-float value
o intBitsToFloat 
  public static float intBitsToFloat(int bits)
Returns the single-float corresponding to a given bit represention. 
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