Java.lang.Double Class
Java Double Class
The Double class in the Java.lang package encapsulates a value of the primitive type double in an object. A single field of type double is included in a Double object. This class also has methods for converting a double to a String and a String to a double, as well as other essential constants and methods for working with doubles. Let us now begin with Java.lang.Double Class.
Class declaration
The declaration of java.lang.Double class is:
public final class Double
extends Number
implements Comparable<Double>
Fields
| S.N | Fields & Description |
|---|---|
| 1. | static int BYTES The number of bytes used to represent a double value. |
| 2. | static int MAX_EXPONENT Maximum exponent a finite double variable may have. |
| 3. | static double MAX_VALUE A constant holding the largest positive finite value of type double, (2-2-52)·21023. |
| 4. | static int MIN_EXPONENT Minimum exponent a normalized double variable may have. |
| 5. | static double MIN_NORMAL A constant holding the smallest positive normal value of type double, 2-1022. |
| 6. | static double MIN_VALUE A constant holding the smallest positive nonzero value of type double, 2-1074. |
| 7. | static double NaN A constant holding a Not-a-Number (NaN) value of type double. |
| 8. | static double NEGATIVE_INFINITY A constant holding the negative infinity of type double. |
| 9. | static double POSITIVE_INFINITY A constant holding the positive infinity of type double. |
| 10. | static int SIZE The number of bits used to represent a double value. |
| 11. | static Class<Double> TYPE The Class instance representing the primitive type double. |
java.lang.Double Methods
The java.lang.Double class has a number of methods which are listed below:
Member Methods
| S.N | Methods & Description |
|---|---|
| 1. | byte byteValue() Returns the value of this Double as a byte after a narrowing primitive conversion. |
| 2. | static int compare(double d1, double d2) Compares the two specified double values. |
| 3. | int compareTo(Double anotherDouble) Compares two Double objects numerically. |
| 4. | static long doubleToLongBits(double value) 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) 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() Returns the double value of this Double object. |
| 7. | boolean equals(Object obj) Compares this object against the specified object. |
| 8. | float floatValue() Returns the value of this Double as a float after a narrowing primitive conversion. |
| 9. | int hashCode() Returns a hash code for this Double object. |
| 10. | static int hashCode(double value) Returns a hash code for a double value; compatible with Double.hashCode(). |
| 11. | int intValue() Returns the value of this Double as an int after a narrowing primitive conversion. |
| 12. | static boolean isFinite(double d) Returns true if the argument is a finite floating-point value; returns false otherwise (for NaN and infinity arguments). |
| 13. | boolean isInfinite() Returns true if this Double value is infinitely large in magnitude, false otherwise. |
| 14. | static boolean isInfinite(double v) Returns true if the specified number is infinitely large in magnitude, false otherwise. |
| 15. | boolean isNaN() Returns true if this Double value is a Not-a-Number (NaN), false otherwise. |
| 16. | static boolean isNaN(double v) Returns true if the specified number is a Not-a-Number (NaN) value, false otherwise. |
| 17. | static double longBitsToDouble(long bits) Returns the double value corresponding to a given bit representation. |
| 18. | long longValue() Returns the value of this Double as a long after a narrowing primitive conversion. |
| 19. | static double max(double a, double b) Returns the greater of two double values as if by calling Math.max. |
| 20. | static double min(double a, double b) Returns the smaller of two double values as if by calling Math.min. |
| 21. | static double parseDouble(String s) Returns a new double initialized to the value represented by the specified String, as performed by the valueOf method of class Double. |
| 22. | short shortValue() Returns the value of this Double as a short after a narrowing primitive conversion. |
| 23. | static double sum(double a, double b) Adds two double values together as per the + operator. |
| 24. | static String toHexString(double d) Returns a hexadecimal string representation of the double argument. |
| 25. | String toString() Returns a string representation of this Double object. |
| 26. | static String toString(double d) Returns a string representation of the double argument. |
| 27. | static Double valueOf(double d) Returns a Double instance representing the specified double value. |
| 28. | static Double valueOf(String s) Returns a Double object holding the double value represented by the argument string s. |
Methods inherited
This class inherits the methods of the following class:
- java.lang.Object
- java.lang.Number
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