Double class Methods in Java

java.lang.Double

The 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. In addition, this class provides several methods for converting a double to a String and a String to a double, as well as other constants and methods useful when dealing with a double.

Some Methods of Double Class

Double.BYTES: The number of bytes used to represent a double value (i.e 8 is returned).

Double.compare(): It compares the two specified double values.

Double.doubleToLongBits():  It returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout.

Double.doubleToRawLongBits(): It 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.

Double.hashCode(): It returns a hash code for a double value.

Double.isFinite(): It returns true if the argument is a finite floating-point value; returns false otherwise (for NaN and infinity arguments).

Double.isInfinite():  It returns true if the specified number is infinitely large in magnitude, false otherwise.

Double.isNaN(): It returns true if the specified number is Not-a-Number (NaN) value, false otherwise.

Double.longBitsToDouble(): It returns the double value corresponding to a given bit representation. The argument is considered to be a representation of a floating-point value according to the IEEE 754 floating-point"double format" bit layout.

Double.max(): It returns the greater of two double values.

Double.MAX_EXPONENT: Maximum exponent a finite double variable may have (i.e 1023).

Double.MAX_VALUE: A constant holding the largest positive finite value of type double (i.e. 1.7976931348623157E308)

Double.min(): It returns the smaller of two double values.

Double.MIN_EXPONENT: Minimum exponent a normalized double variable may have (i.e. -1022)

Double.MIN_NORMAL:  A constant holding the smallest positive normal value of type double (i.e. 2.2250738585072014E-308)

Double.NaN: A constant holding a Not-a-Number (NaN) value of type double.

Double.NEGATIVE_INFINITY: A constant holding the negative infinity of type double.

Double.parseDouble(): It returns a new double initialized to the value represented by the specified String.

Double.POSITIVE_INFINITY: A constant holding the positive infinity of type double.

Double.SIZE: The number of bits is used to represent a double value (i.e. 64).

Double.sum(): It adds two double values together as per the + operator.

Double.toHexString(): It returns a hexadecimal string representation of the double argument.

Double.toString(): It returns a string representation of the double argument.

Double.valueOf(double d): It returns a Double instance representing the specified double value.

Double.valueOf(): It returns a Double-object holding the double value represented by the argument string s.