Java The Complete Reference, Seventh Edition

388 Part II: The Java Library

Method Description

boolean isNaN( ) Returnstrueif the invoking object contains a value that is

not a number. Other wise, it returnsfalse.

static boolean isNaN(floatnum) Returnstrueifnumspecifies a value that is not a number.

Other wise, it returnsfalse.

long longValue( ) Returns the value of the invoking object as along.

static float parseFloat(Stringstr)

throws NumberFormatException

Returns thefloatequivalent of the number contained in the

string specified bystrusing radix 10.

short shortValue( ) Returns the value of the invoking object as ashort.

static String toHexString(floatnum) Returns a string containing the value ofnumin

hexadecimal format.

String toString( ) Returns the string equivalent of the invoking object.

static String toString(floatnum) Returns the string equivalent of the value specified bynum.

static Float valueOf(floatnum) Returns aFloatobject containing the value passed innum.

static Float valueOf(Stringstr)

throws NumberFormatException

Returns theFloatobject that contains the value specified

by the string instr.

TABLE 16-1 The Methods Defined byFloat(continued)

Method Description

byte byteValue( ) Returns the value of the invoking object as abyte.

static int compare(doublenum1,

doublenum2)

Compares the values ofnum1andnum2.Returns 0

if the values are equal. Returns a negative value if

num1is less thannum2.Returns a positive value if

num1is greater thannum2.

int compareTo(Doubled) Compares the numerical value of the invoking object

with that ofd.Returns 0 if the values are equal.

Returns a negative value if the invoking object has a

lower value. Returns a positive value if the invoking

object has a greater value.

static long doubleToLongBits(doublenum) Returns the IEEE-compatible, double-precision bit

pattern that corresponds tonum.

static long doubleToRawLongBits(doublenum) Retuns the IEEE-compatible double-precision bit

pattern that corresponds tonum. A NaN value is

preser ved.

double doubleValue( ) Returns the value of the invoking object as adouble.

boolean equals(ObjectDoubleObj) Returnstrueif the invokingDoubleobject is equivalent

toDoubleObj.Other wise, it returnsfalse.

float floatValue( ) Returns the value of the invoking object as afloat.

int hashcode( ) Returns the hash code for the invoking object.

int intValue( ) Returns the value of the invoking object as anint.

TABLE 16-2 The Methods Defined byDouble