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Android Reference

Double

java.lang

Class Double

java.lang.Object
- java.lang.Number
- - java.lang.Double

All Implemented Interfaces:

Serializable, Comparable<Double>
```
public final class Double
extends Number
implements Comparable<Double>
```
The wrapper for the primitive type double.

Since:

1.0

See Also:
Number, Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`MAX_EXPONENT` Maximum base-2 exponent that a finite value of the `double` type may have.
`static double`	`MAX_VALUE` Constant for the maximum `double` value, (2 - 2^-52) * 2¹⁰²³.
`static int`	`MIN_EXPONENT` Minimum base-2 exponent that a normal value of the `double` type may have.
`static double`	`MIN_NORMAL` Constant for the smallest positive normal value of the `double` type.
`static double`	`MIN_VALUE` Constant for the minimum `double` value, 2^-1074.
`static double`	`NaN` Constant for the Not-a-Number (NaN) value of the `double` type.
`static double`	`NEGATIVE_INFINITY` Constant for the negative infinity value of the `double` type.
`static double`	`POSITIVE_INFINITY` Constant for the positive infinity value of the `double` type.
`static int`	`SIZE` Constant for the number of bits needed to represent a `double` in two's complement form.
`static Class<Double>`	`TYPE` The `Class` object that represents the primitive type `double`.

Constructor Summary

Constructors
Constructor and Description
`Double(double value)` Constructs a new `Double` with the specified primitive double value.
`Double(String string)` Constructs a new `Double` from the specified string.

Method Summary

Methods
Modifier and Type	Method and Description
`byte`	`byteValue()` Returns this object's value as a byte.
`static int`	`compare(double double1, double double2)` Compares the two specified double values.
`int`	`compareTo(Double object)` Compares this object to the specified double object to determine their relative order.
`static long`	`doubleToLongBits(double value)` Returns an integer corresponding to the bits of the given IEEE 754 double precision `value`.
`static long`	`doubleToRawLongBits(double value)` Returns an integer corresponding to the bits of the given IEEE 754 double precision `value`.
`double`	`doubleValue()` Gets the primitive value of this double.
`boolean`	`equals(Object object)` Tests this double for equality with `object`.
`float`	`floatValue()` Returns this object's value as a float.
`int`	`hashCode()` Returns an integer hash code for this object.
`int`	`intValue()` Returns this object's value as an int.
`boolean`	`isInfinite()` Indicates whether this object represents an infinite value.
`static boolean`	`isInfinite(double d)` Indicates whether the specified double represents an infinite value.
`boolean`	`isNaN()` Indicates whether this object is a Not-a-Number (NaN) value.
`static boolean`	`isNaN(double d)` Indicates whether the specified double is a Not-a-Number (NaN) value.
`static double`	`longBitsToDouble(long bits)` Returns the IEEE 754 double precision float corresponding to the given `bits`.
`long`	`longValue()` Returns this object's value as a long.
`static double`	`parseDouble(String string)` Parses the specified string as a double value.
`short`	`shortValue()` Returns this object's value as a short.
`static String`	`toHexString(double d)` Converts the specified double into its hexadecimal string representation.
`String`	`toString()` Returns a string containing a concise, human-readable description of this object.
`static String`	`toString(double d)` Returns a string containing a concise, human-readable description of the specified double value.
`static Double`	`valueOf(double d)` Returns a `Double` instance for the specified double value.
`static Double`	`valueOf(String string)` Parses the specified string as a double value.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - MAX_VALUE
```
public static final double MAX_VALUE
```
    Constant for the maximum double value, (2 - 2^-52) * 2¹⁰²³.
    
    See Also:
    Constant Field Values
  - MIN_VALUE
```
public static final double MIN_VALUE
```
    Constant for the minimum double value, 2^-1074.
    
    See Also:
    Constant Field Values
  - NaN
```
public static final double NaN
```
    Constant for the Not-a-Number (NaN) value of the double type.
    
    See Also:
    Constant Field Values
  - POSITIVE_INFINITY
```
public static final double POSITIVE_INFINITY
```
    Constant for the positive infinity value of the double type.
    
    See Also:
    Constant Field Values
  - NEGATIVE_INFINITY
```
public static final double NEGATIVE_INFINITY
```
    Constant for the negative infinity value of the double type.
    
    See Also:
    Constant Field Values
  - MIN_NORMAL
```
public static final double MIN_NORMAL
```
    Constant for the smallest positive normal value of the double type.
    
    Since:
    
    1.6
    
    See Also:
    Constant Field Values
  - MAX_EXPONENT
```
public static final int MAX_EXPONENT
```
    Maximum base-2 exponent that a finite value of the double type may have. Equal to Math.getExponent(Double.MAX_VALUE).
    
    Since:
    
    1.6
    
    See Also:
    Constant Field Values
  - MIN_EXPONENT
```
public static final int MIN_EXPONENT
```
    Minimum base-2 exponent that a normal value of the double type may have. Equal to Math.getExponent(Double.MIN_NORMAL).
    
    Since:
    
    1.6
    
    See Also:
    Constant Field Values
  - TYPE
```
public static final Class<Double> TYPE
```
    The Class object that represents the primitive type double.
    
    Since:
    
    1.1
  - SIZE
```
public static final int SIZE
```
    Constant for the number of bits needed to represent a double in two's complement form.
    
    Since:
    
    1.5
    
    See Also:
    Constant Field Values
- Constructor Detail
  - Double
```
public Double(double value)
```
    Constructs a new Double with the specified primitive double value.
    
    Parameters:
    value - the primitive double value to store in the new instance.
  - Double
```
public Double(String string)
       throws NumberFormatException
```
    Constructs a new Double from the specified string.
    
    Parameters:
    string - the string representation of a double value.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a double value.
    See Also:
    parseDouble(String)
- Method Detail
  - compareTo
```
public int compareTo(Double object)
```
    Compares this object to the specified double object to determine their relative order. There are two special cases:
    - Double.NaN is equal to Double.NaN and it is greater than any other double value, including Double.POSITIVE_INFINITY;
    - +0.0d is greater than -0.0d
    Specified by:
    
    compareTo in interface Comparable<Double>
    
    Parameters:
    object - the double object to compare this object to.
    
    Returns:
    a negative value if the value of this double is less than the value of object; 0 if the value of this double and the value of object are equal; a positive value if the value of this double is greater than the value of object.
    
    Throws:
    
    NullPointerException - if object is null.
    Since:
    
    1.2
    
    See Also:
    Comparable
  - byteValue
```
public byte byteValue()
```
    Description copied from class: Number
    
    Returns this object's value as a byte. Might involve rounding and/or truncating the value, so it fits into a byte.
    
    Overrides:
    
    byteValue in class Number
    
    Returns:
    the primitive byte value of this object.
  - doubleToLongBits
```
public static long doubleToLongBits(double value)
```
    Returns an integer corresponding to the bits of the given IEEE 754 double precision value. All Not-a-Number (NaN) values are converted to a single NaN representation (0x7ff8000000000000L) (compare to doubleToRawLongBits(double)).
  - doubleToRawLongBits
```
public static long doubleToRawLongBits(double value)
```
    Returns an integer corresponding to the bits of the given IEEE 754 double precision value. Not-a-Number (NaN) values are preserved (compare to doubleToLongBits(double)).
  - doubleValue
```
public double doubleValue()
```
    Gets the primitive value of this double.
    
    Specified by:
    
    doubleValue in class Number
    
    Returns:
    this object's primitive value.
  - equals
```
public boolean equals(Object object)
```
    Tests this double for equality with object. To be equal, object must be an instance of Double and doubleToLongBits must give the same value for both objects.
    Note that, unlike ==, -0.0 and +0.0 compare unequal, and NaNs compare equal by this method.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    object - the object to compare this double with.
    
    Returns:
    true if the specified object is equal to this Double; false otherwise.
    See Also:
    Object.hashCode()
  - floatValue
```
public float floatValue()
```
    Description copied from class: Number
    
    Returns this object's value as a float. Might involve rounding.
    
    Specified by:
    
    floatValue in class Number
    
    Returns:
    the primitive float value of this object.
  - hashCode
```
public int hashCode()
```
    Description copied from class: Object
    
    Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.
    Note that hash values must not change over time unless information used in equals comparisons also changes.
    See Writing a correct hashCode method if you intend implementing your own hashCode method.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    this object's hash code.
    See Also:
    Object.equals(java.lang.Object)
  - intValue
```
public int intValue()
```
    Description copied from class: Number
    
    Returns this object's value as an int. Might involve rounding and/or truncating the value, so it fits into an int.
    
    Specified by:
    
    intValue in class Number
    
    Returns:
    the primitive int value of this object.
  - isInfinite
```
public boolean isInfinite()
```
    Indicates whether this object represents an infinite value.
    
    Returns:
    true if the value of this double is positive or negative infinity; false otherwise.
  - isInfinite
```
public static boolean isInfinite(double d)
```
    Indicates whether the specified double represents an infinite value.
    
    Parameters:
    d - the double to check.
    
    Returns:
    true if the value of d is positive or negative infinity; false otherwise.
  - isNaN
```
public boolean isNaN()
```
    Indicates whether this object is a Not-a-Number (NaN) value.
    
    Returns:
    true if this double is Not-a-Number; false if it is a (potentially infinite) double number.
  - isNaN
```
public static boolean isNaN(double d)
```
    Indicates whether the specified double is a Not-a-Number (NaN) value.
    
    Parameters:
    d - the double value to check.
    
    Returns:
    true if d is Not-a-Number; false if it is a (potentially infinite) double number.
  - longBitsToDouble
```
public static double longBitsToDouble(long bits)
```
    Returns the IEEE 754 double precision float corresponding to the given bits.
  - longValue
```
public long longValue()
```
    Description copied from class: Number
    
    Returns this object's value as a long. Might involve rounding and/or truncating the value, so it fits into a long.
    
    Specified by:
    
    longValue in class Number
    
    Returns:
    the primitive long value of this object.
  - parseDouble
```
public static double parseDouble(String string)
                          throws NumberFormatException
```
    Parses the specified string as a double value.
    
    Parameters:
    string - the string representation of a double value.
    
    Returns:
    the primitive double value represented by string.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a double value.
  - shortValue
```
public short shortValue()
```
    Description copied from class: Number
    
    Returns this object's value as a short. Might involve rounding and/or truncating the value, so it fits into a short.
    
    Overrides:
    
    shortValue in class Number
    
    Returns:
    the primitive short value of this object.
  - toString
```
public String toString()
```
    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
```
   getClass().getName() + '@' + Integer.toHexString(hashCode())
```
    See Writing a useful toString method if you intend implementing your own toString method.
    Overrides:
    
    toString in class Object
    
    Returns:
    a printable representation of this object.
  - toString
```
public static String toString(double d)
```
    Returns a string containing a concise, human-readable description of the specified double value.
    
    Parameters:
    d - the double to convert to a string.
    
    Returns:
    a printable representation of d.
  - valueOf
```
public static Double valueOf(String string)
                      throws NumberFormatException
```
    Parses the specified string as a double value.
    
    Parameters:
    string - the string representation of a double value.
    
    Returns:
    a Double instance containing the double value represented by string.
    
    Throws:
    
    NumberFormatException - if string cannot be parsed as a double value.
    See Also:
    parseDouble(String)
  - compare
```
public static int compare(double double1,
          double double2)
```
    Compares the two specified double values. There are two special cases:
    - Double.NaN is equal to Double.NaN and it is greater than any other double value, including Double.POSITIVE_INFINITY;
    - +0.0d is greater than -0.0d
    Parameters:
    double1 - the first value to compare.
    double2 - the second value to compare.
    
    Returns:
    a negative value if double1 is less than double2; 0 if double1 and double2 are equal; a positive value if double1 is greater than double2.
  - valueOf
```
public static Double valueOf(double d)
```
    Returns a Double instance for the specified double value.
    
    Parameters:
    d - the double value to store in the instance.
    
    Returns:
    a Double instance containing d.
    Since:
    
    1.5
  - toHexString
```
public static String toHexString(double d)
```
    Converts the specified double into its hexadecimal string representation.
    
    Parameters:
    d - the double to convert.
    
    Returns:
    the hexadecimal string representation of d.
    Since:
    
    1.5

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IT. Expert System.

Android Reference

Double

Class Double

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAX_VALUE

MIN_VALUE

NaN

POSITIVE_INFINITY

NEGATIVE_INFINITY

MIN_NORMAL

MAX_EXPONENT

MIN_EXPONENT

TYPE

SIZE

Constructor Detail

Double

Double

Method Detail

compareTo

byteValue

doubleToLongBits

doubleToRawLongBits

doubleValue

equals

floatValue

hashCode

intValue

isInfinite

isInfinite

isNaN

isNaN

longBitsToDouble

longValue

parseDouble

shortValue

toString

toString

valueOf

compare

valueOf

toHexString

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary