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 NaN
Not-a-Number.
o NEGATIVE_INFINITY
Negative infinity.
o POSITIVE_INFINITY
Positive infinity.

Constructor Index

o Float(double)
Constructs a Float wrapper for the specified double value.
o Float(float)
Constructs a Float wrapper for the specified float 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()
Returns true if this Float value is infinitely large in magnitude.
o isInfinite(float)
Returns true if the specified number is infinitely large in magnitude.
o isNaN()
Returns true if this Float value is Not-a-Number (NaN).
o isNaN(float)
Returns true if the specified number is the special Not-a-Number (NaN) value.
o longValue()
Returns the long value of this Float (by casting to a long).
o toString()
Returns a String representation of this Float object.
o toString(float)
Returns a String representation for the specified float value.
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. 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. 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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