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java.lang.Object
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+----java.lang.Number
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+----java.lang.Float
float in an object. An object of type Float contains a single field whose type is float. In addition, this class provides several methods for converting a float to a String and a String to a float, as well as other constants and methods useful when dealing with a float.
MAX_VALUE float. MIN_VALUE float. NaN float. NEGATIVE_INFINITY float. POSITIVE_INFINITY float. TYPE 
Float(double) Floatobject that represents the argument converted to type float. Float(float) Float object that represents the primitive float argument. Float(String) Float object that represents the floating- point value of type float represented by the string. 
byteValue() doubleValue() equals(Object) 
floatToIntBits(float) floatValue() hashCode() intBitsToFloat(int) intValue() isInfinite() isInfinite(float) isNaN() isNaN(float) longValue() shortValue() toString() toString(float) valueOf(String) 
POSITIVE_INFINITY
public static final float POSITIVE_INFINITY
float. NEGATIVE_INFINITY
public static final float NEGATIVE_INFINITY
float. NaN
public static final float NaN
float. MAX_VALUE
public static final float MAX_VALUE
float. MIN_VALUE
public static final float MIN_VALUE
float. TYPE
public static final Class TYPE
Float
public Float(float value)
Float object that represents the primitive float argument. Float. Float
public Float(double value)
Floatobject that represents the argument converted to type float. Float. Float
public Float(String s) throws NumberFormatException
Float object that represents the floating- point value of type float represented by the string. The string is converted to a float value as if by the valueOf method. Float. 
toString
public static String toString(float f)
The values NaN, NEGATIVE_INFINITY, POSITIVE_INFINITY, -0.0, and +0.0 are represented by the strings "NaN", "-Infinity", "Infinity", "-0.0", and "0.0", respectively.
If d is in the range 10-3 <= |d| <= 107, then it is converted to a String in the style [-]ddd.ddd. Otherwise, it is converted to a string in the style [-]m.ddddE±xx.
There is always a minimum of 1 digit after the decimal point. The number of digits is the minimum needed to uniquely distinguish the argument value from adjacent values of type float.
valueOf
public static Float valueOf(String s) throws NumberFormatException
Float initialized to the value represented by the String argument. isNaN
public static boolean isNaN(float v)
true if the argument is NaN; false otherwise. isInfinite
public static boolean isInfinite(float v)
true if the argument is positive infinity or negative infinity; false otherwise. 
isNaN
public boolean isNaN()
true if the value represented by this object is NaN; false otherwise. isInfinite
public boolean isInfinite()
true if the value represented by this object is positive infinity or negative infinity; false otherwise. toString
public String toString()
float value represented by this object is converted to a String exactly as if by the method toString of one argument. String representation of this object. byteValue
public byte byteValue()
shortValue
public short shortValue()
intValue
public int intValue()
float value represented by this object converted to type int and the result of the conversion is returned. longValue
public long longValue()
float value represented by this object is converted to type long and the result of the conversion is returned. floatValue
public float floatValue()
float value represented by this object. doubleValue
public double doubleValue()
hashCode
public int hashCode()
equals
public boolean equals(Object obj)
true if and only if the argument is not null and is a Float object that represents a float that has the identical bit pattern to the bit pattern of the float represented by this object. Note that in most cases, for two instances of class Float, f1 and f2, the value of f1.equals(f2) is true if and only if
f1.floatValue() == f2.floatValue() also has the value true. However, there are two exceptions:
f1 and f2 both represent Float.NaN, then the equals method returns true, even though Float.NaN==Float.NaN has the value false. f1 represents +0.0f while f2 represents -0.0f, or vice versa, the equal test has the value false, even though 0.0f==-0.0f has the value true. true if the objects are the same; false otherwise. floatToIntBits
public static native int floatToIntBits(float value)
Bit 31 represents the sign of the floating-point number. Bits 30-23 represent the exponent. Bits 22-0 represent the significand (sometimes called the mantissa) of the floating-point number.
If the argument is positive infinity, the result is 0x7f800000.
If the argument is negative infinity, the result is 0xff800000.
If the argument is NaN, the result is 0x7fc00000.
intBitsToFloat
public static native float intBitsToFloat(int bits)
If the argument is 0x7f800000, the result is positive infinity.
If the argument is 0xff800000, the result is negative infinity.
If the argument is any value in the range 0x7f800001 through 0x7f8fffff or in the range 0xff800001 through 0xff8fffff, the result is NaN. All IEEE 754 NaN values are, in effect, lumped together by the Java language into a single value.
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