Checksum
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Known Indirect Subclasses
| Adler32 |
A class that can be used to compute the Adler-32 checksum of a data
stream. |
| CRC32 |
A class that can be used to compute the CRC-32 of a data stream. |
|
An interface representing a data checksum.
Public Method Summary
|
abstract
long
|
getValue()
Returns the current checksum value.
|
|
abstract
void
|
reset()
Resets the checksum to its initial value.
|
|
abstract
void
|
update(byte[] b, int off, int len)
Updates the current checksum with the specified array of bytes.
|
|
abstract
void
|
update(int b)
Updates the current checksum with the specified byte.
|
Public Methods
public
abstract
long
getValue
()
Returns the current checksum value.
Returns
- the current checksum value
public
abstract
void
reset
()
Resets the checksum to its initial value.
public
abstract
void
update
(byte[] b, int off, int len)
Updates the current checksum with the specified array of bytes.
Parameters
| b |
the byte array to update the checksum with |
| off |
the start offset of the data |
| len |
the number of bytes to use for the update
|
public
abstract
void
update
(int b)
Updates the current checksum with the specified byte.
Parameters
| b |
the byte to update the checksum with
|
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Last updated 2024-07-10 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-10 UTC."],[[["\u003cp\u003e\u003ccode\u003eChecksum\u003c/code\u003e is an interface in Java that represents a data checksum, used to verify data integrity.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to update the checksum with bytes or byte arrays, reset the checksum, and retrieve the current checksum value.\u003c/p\u003e\n"],["\u003cp\u003eKnown implementations include \u003ccode\u003eAdler32\u003c/code\u003e and \u003ccode\u003eCRC32\u003c/code\u003e, which are used to compute Adler-32 and CRC-32 checksums, respectively.\u003c/p\u003e\n"]]],["The `Checksum` interface defines methods for managing data checksums. It includes `getValue()` to retrieve the current checksum value, `reset()` to revert to the initial state, and `update()` for incorporating data into the checksum. There are two `update` methods, one for handling a byte array with specified offset and length, and another one to handle a single byte. The `Adler32` and `CRC32` classes are indirect subclasses, and compute different type of data stream checksum.\n"],null,["public interface **Checksum** \n\n|---|---|---|\n| Known Indirect Subclasses [Adler32](../../../../reference/java/util/zip/Adler32.html), [CRC32](../../../../reference/java/util/zip/CRC32.html) |-------------------------------------------------------------|-----------------------------------------------------------------------------| | [Adler32](../../../../reference/java/util/zip/Adler32.html) | A class that can be used to compute the Adler-32 checksum of a data stream. | | [CRC32](../../../../reference/java/util/zip/CRC32.html) | A class that can be used to compute the CRC-32 of a data stream. | |||\n\nAn interface representing a data checksum. \n\nPublic Method Summary\n\n|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| abstract long | [getValue](../../../../reference/java/util/zip/Checksum.html#getValue())() Returns the current checksum value. |\n| abstract void | [reset](../../../../reference/java/util/zip/Checksum.html#reset())() Resets the checksum to its initial value. |\n| abstract void | [update](../../../../reference/java/util/zip/Checksum.html#update(byte[],%20int,%20int))(byte\\[\\] b, int off, int len) Updates the current checksum with the specified array of bytes. |\n| abstract void | [update](../../../../reference/java/util/zip/Checksum.html#update(int))(int b) Updates the current checksum with the specified byte. |\n\nPublic Methods \n\npublic abstract long\n**getValue**\n() \nReturns the current checksum value. \n\nReturns\n\n- the current checksum value \n\npublic abstract void\n**reset**\n() \nResets the checksum to its initial value. \n\npublic abstract void\n**update**\n(byte\\[\\] b, int off, int len) \nUpdates the current checksum with the specified array of bytes. \n\nParameters\n\n| b | the byte array to update the checksum with |\n| off | the start offset of the data |\n| len | the number of bytes to use for the update |\n|-----|--------------------------------------------|\n\npublic abstract void\n**update**\n(int b) \nUpdates the current checksum with the specified byte. \n\nParameters\n\n| b | the byte to update the checksum with |\n|---|--------------------------------------|"]]
