OpenJDK 27 · java.util.zip.Adler32 · APIdia, the JavaDoc alternative

A class that can be used to compute the Adler-32 checksum of a data stream. An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed much faster.

Passing a null argument to a method in this class will cause a NullPointerException to be thrown.

Field Summary

Modifier and Type	Field and Description
private int	adler

Constructor Summary

Access	Constructor and Description
public	Adler32() Creates a new Adler32 object.

Method Summary

Modifier and Type	Method and Description
public long	getValue() Implements java.util.zip.Checksum.getValue. Returns the checksum value.
public void	reset() Implements java.util.zip.Checksum.reset. Resets the checksum to initial value.
public void	update(int b) Implements java.util.zip.Checksum.update. Updates the checksum with the specified byte (the low eight bits of the argument b).
public void	update(byte[] b, int off, int len) Implements java.util.zip.Checksum.update. Updates the checksum with the specified array of bytes.
public void	update(ByteBuffer buffer) Overrides default java.util.zip.Checksum.update. Updates the checksum with the bytes from the specified buffer.
private static native int	update(int adler, int b)
private static native int	updateByteBuffer(int adler, long addr, int off, int len)
private static native int	updateBytes(int adler, byte[] b, int off, int len)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

adler	back to summary
private int adler

Constructor Detail

Adler32	back to summary
public Adler32() Creates a new Adler32 object.

Method Detail

getValue	back to summary
public long getValue() Implements java.util.zip.Checksum.getValue. Returns the checksum value. Annotations @Override

getValue

back to summary

public long getValue()

Implements java.util.zip.Checksum.getValue.

Returns the checksum value.

Annotations

@Override

reset	back to summary
public void reset() Implements java.util.zip.Checksum.reset. Resets the checksum to initial value. Annotations @Override

reset

back to summary

public void reset()

Implements java.util.zip.Checksum.reset.

Resets the checksum to initial value.

Annotations

@Override

update	back to summary
public void update(int b) Implements java.util.zip.Checksum.update. Updates the checksum with the specified byte (the low eight bits of the argument b). Annotations @Override

update

back to summary

public void update(int b)

Implements java.util.zip.Checksum.update.

Updates the checksum with the specified byte (the low eight bits of the argument b).

Annotations

@Override

update back to summary

update	back to summary
public void update(byte[] b, int off, int len) Implements java.util.zip.Checksum.update. Updates the checksum with the specified array of bytes. Annotations @Override Exceptions ArrayIndexOutOfBoundsException: if `off` is negative, or `len` is negative, or `off+len` is negative or greater than the length of the array `b`.

public void update(byte[] b, int off, int len)

Implements java.util.zip.Checksum.update.

Updates the checksum with the specified array of bytes.

Annotations

@Override

Exceptions

ArrayIndexOutOfBoundsException:: if off is negative, or len is negative, or off+len is negative or greater than the length of the array b.

update	back to summary
public void update(ByteBuffer buffer) Overrides default java.util.zip.Checksum.update. Updates the checksum with the bytes from the specified buffer. The checksum is updated with the remaining bytes in the buffer, starting at the buffer's position. Upon return, the buffer's position will be updated to its limit; its limit will not have been changed. Annotations @Override Since 1.8

update

back to summary

public void update(ByteBuffer buffer)

Overrides default java.util.zip.Checksum.update.

Updates the checksum with the bytes from the specified buffer. The checksum is updated with the remaining bytes in the buffer, starting at the buffer's position. Upon return, the buffer's position will be updated to its limit; its limit will not have been changed.

Annotations

@Override

Since

1.8

update	back to summary
private static native int update(int adler, int b)

updateByteBuffer	back to summary
private static native int updateByteBuffer(int adler, long addr, int off, int len) Annotations @IntrinsicCandidate

updateBytes	back to summary
private static native int updateBytes(int adler, byte[] b, int off, int len) Annotations @IntrinsicCandidate

public Class Adler32

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail