Introduction
The java.lang.Double class wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double.Class declaration
Following is the declaration for java.lang.Double class:public final class Double extends Number implements Comparable<Double>
Field
Following are the fields for java.lang.Double class:- static int MAX_EXPONENT -- This is the maximum exponent a finite double variable may have.
- static double MAX_VALUE -- This is the constant holding the largest positive finite value of type double, (2-2-52)×21023.
- static int MIN_EXPONENT -- This is the minimum exponent a normalized double variable may have.
- static double MIN_NORMAL -- This is the constant holding the smallest positive normal value of type double, 2-1022.
- static double MIN_VALUE -- This is the constant holding the smallest positive nonzero value of type double, 2-1074.
- static double NaN -- This is the constant holding a Not-a-Number (NaN) value of type double.
- static double NEGATIVE_INFINITY -- This is the constant holding the negative infinity of type double.
- static double POSITIVE_INFINITY -- This is the constant holding the positive infinity of type double.
- static int SIZE -- This is the number of bits used to represent a double value.
- static Class<Double> TYPE -- This is the class instance representing the primitive type double
Class constructors
S.N. | Constructor & Description |
---|---|
1 |
Double(double value) This constructs a newly allocated Double object that represents the primitive double argument. |
2 |
Double(String s) This constructs a newly allocated Double object that represents the floating-point value of type double represented by the string. |
Class methods
S.N. | Method & Description |
---|---|
1 |
byte byteValue() This method returns the value of this Double as a byte (by casting to a byte). |
2 |
static int compare(double d1, double d2) This method compares the two specified double values. |
3 |
int compareTo(Double anotherDouble) This method compares the two specified double values. |
4 |
static long doubleToLongBits(double value) This method returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout. |
5 |
static long doubleToRawLongBits(double value) This method returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout, preserving Not-a-Number (NaN) values. |
6 |
double doubleValue() This method returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout, preserving Not-a-Number (NaN) values. |
7 |
boolean equals(Object obj) This method compares this object against the specified object. |
8 |
float floatValue() This method returns the float value of this Double object. |
9 |
int hashCode() This method returns a hash code for this Double object. |
10 |
int intValue() This method returns the value of this Double as an int (by casting to type int). |
11 |
boolean isInfinite() This method returns true if this Double value is infinitely large in magnitude, false otherwise. |
12 |
static boolean isInfinite(double v) This method returns true if the specified number is infinitely large in magnitude, false otherwise. |
13 |
boolean isNaN() This method returns true if this Double value is a Not-a-Number (NaN), false otherwise. |
14 |
static boolean isNaN(double v) This method returns true if the specified number is a Not-a-Number (NaN) value, false otherwise. |
15 |
static double longBitsToDouble(long bits) This method returns the double value corresponding to a given bit representation. |
16 |
long longValue() This method returns the value of this Double as a long (by casting to type long). |
17 |
static double parseDouble(String s) This method returns a new double initialized to the value represented by the specified String, as performed by the valueOf method of class Double. |
18 |
short shortValue() This method returns the value of this Double as a short (by casting to a short). |
19 |
static String toHexString(double d) This method returns a hexadecimal string representation of the double argument. |
20 |
String toString() This method returns a string representation of this Double object. |
21 |
static String toString(double d) This method returns a string representation of the double argument. |
22 |
static Double valueOf(double d) This method returns a Double instance representing the specified double value. |
23 |
static Double valueOf(String s) This method returns a Double object holding the double value represented by the argument string s. |
Methods inherited
This class inherits methods from the following classes:- java.lang.Object
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