Java.lang.Long Class
Java Long Class
The Long class in the Java.lang package encapsulates a value of the primitive type long in an object. A single field of type long is included in a Long object.
This class also has various methods for converting a long to a String and a String to a long, as well as additional constants and methods that are handy when working with longs.
Class declaration
The declaration of java.lang.Long class is:
public final class Long
extends Number
implements Comparable<Long>
Fields
| S.N | Fields & Description |
|---|---|
| 1. | static int BYTES The number of bytes used to represent a long value in two’s complement binary form. |
| 2. | static long MAX_VALUE A constant holding the maximum value a long can have, 263-1. |
| 3. | static long MIN_VALUE A constant holding the minimum value a long can have, -263. |
| 4. | static int SIZE The number of bits used to represent a long value in two’s complement binary form. |
| 5. | static Class<Long> TYPE The Class instance representing the primitive type long. |
java.lang.Long Methods
There are several methods in the java.lang.Long class, which are mentioned below:
Member Methods
| S.N | Methods & Description |
|---|---|
| 1. | static int bitCount(long i) Returns the number of one-bits in the two’s complement binary representation of the specified long value. |
| 2. | byte byteValue() Returns the value of this Long as a byte after a narrowing primitive conversion. |
| 3. | static int compare(long x, long y) Compares two long values numerically. |
| 4. | int compareTo(Long anotherLong) Compares two Long objects numerically. |
| 5. | static int compareUnsigned(long x, long y) Compares two long values numerically treating the values as unsigned. |
| 6. | static Long decode(String nm) Decodes a String into a Long. |
| 7. | static long divideUnsigned(long dividend, long divisor) Returns the unsigned quotient of dividing the first argument by the second where each argument and the result is interpreted as an unsigned value. |
| 8. | double doubleValue() Returns the value of this Long as a double after a widening primitive conversion. |
| 9. | boolean equals(Object obj) Compares this object to the specified object. |
| 10. | float floatValue() Returns the value of this Long as a float after a widening primitive conversion. |
| 11. | static Long getLong(String nm) Determines the long value of the system property with the specified name. |
| 12. | static Long getLong(String nm, long val) Determines the long value of the system property with the specified name. |
| 13. | static Long getLong(String nm, Long val) Returns the long value of the system property with the specified name. |
| 14. | int hashCode() Returns a hash code for this Long. |
| 15. | static int hashCode(long value) Returns a hash code for a long value; compatible with Long.hashCode(). |
| 16. | static long highestOneBit(long i) Returns a long value with at most a single one-bit, in the position of the highest-order (“leftmost”) one-bit in the specified long value. |
| 17. | int intValue() Returns the value of this Long as an int after a narrowing primitive conversion. |
| 18. | long longValue() Returns the value of this Long as a long value. |
| 19. | static long lowestOneBit(long i) Returns a long value with at most a single one-bit, in the position of the lowest-order (“rightmost”) one-bit in the specified long value. |
| 20. | static long max(long a, long b) Returns the greater of two long values as if by calling Math.max. |
| 21. | static long min(long a, long b) Returns the smaller of two long values as if by calling Math.min. |
| 22. | static int numberOfLeadingZeros(long i) Returns the number of zero bits preceding the highest-order (“leftmost”) one-bit in the two’s complement binary representation of the specified long value. |
| 23. | static int numberOfTrailingZeros(long i) Returns the number of zero bits following the lowest-order (“rightmost”) one-bit in the two’s complement binary representation of the specified long value. |
| 24. | static long parseLong(String s) Parses the string argument as a signed decimal long. |
| 25. | static long parseLong(String s, int radix) Parses the string argument as a signed long in the radix specified by the second argument. |
| 26. | static long parseUnsignedLong(String s) Parses the string argument as an unsigned decimal long. |
| 27. | static long parseUnsignedLong(String s, int radix) Parses the string argument as an unsigned long in the radix specified by the second argument. |
| 28. | static long remainderUnsigned(long dividend, long divisor) Returns the unsigned remainder from dividing the first argument by the second where each argument and the result is interpreted as an unsigned value. |
| 29. | static long reverse(long i) Returns the value obtained by reversing the order of the bits in the two’s complement binary representation of the specified long value. |
| 30. | static long reverseBytes(long i) Returns the value obtained by reversing the order of the bytes in the two’s complement representation of the specified long value. |
| 31. | static long rotateLeft(long i, int distance) Returns the value obtained by rotating the two’s complement binary representation of the specified long value left by the specified number of bits. |
| 32. | static long rotateRight(long i, int distance) Returns the value obtained by rotating the two’s complement binary representation of the specified long value right by the specified number of bits. |
| 33. | short shortValue() Returns the value of this Long as a short after a narrowing primitive conversion. |
| 34. | static int signum(long i) Returns the signum function of the specified long value. |
| 35. | static long sum(long a, long b) Adds two long values together as per the + operator. |
| 36. | static String toBinaryString(long i) Returns a string representation of the long argument as an unsigned integer in base 2. |
| 37. | static String toHexString(long i) Returns a string representation of the long argument as an unsigned integer in base 16. |
| 38. | static String toOctalString(long i) Returns a string representation of the long argument as an unsigned integer in base 8. |
| 39. | String toString() Returns a String object representing this Long’s value. |
| 40. | static String toString(long i) Returns a String object representing the specified long. |
| 41. | static String toString(long i, int radix) Returns a string representation of the first argument in the radix specified by the second argument. |
| 42. | static String toUnsignedString(long i) Returns a string representation of the argument as an unsigned decimal value. |
| 43. | static String toUnsignedString(long i, int radix) Returns a string representation of the first argument as an unsigned integer value in the radix specified by the second argument. |
| 44. | static Long valueOf(long l) Returns a Long instance representing the specified long value. |
| 45. | static Long valueOf(String s) Returns a Long object holding the value of the specified String. |
| 46. | static Long valueOf(String s, int radix) Returns a Long object holding the value extracted from the specified String when parsed with the radix given by the second argument. |
Methods inherited
This class inherits the methods of the following class:
- java.lang.Object
- java.lang.Number
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