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sun.awt.image

pack-priv Class PNGFilterInputStream

Located in compilation unit of sun.awt.image.PNGImageDecoder.

extends FilterInputStream
Class Inheritance

Field Summary

Modifier and TypeField and Description
pack-priv PNGImageDecoder
owner

public InputStream
underlyingInputStream

Inherited from java.io.FilterInputStream:
in

Constructor Summary

AccessConstructor and Description
public
PNGFilterInputStream(PNGImageDecoder owner, InputStream is)

Method Summary

Modifier and TypeMethod and Description
public int
available()

Overrides java.io.FilterInputStream.available.

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.

public boolean
markSupported()

Overrides java.io.FilterInputStream.markSupported.

Tests if this input stream supports the mark and reset methods.

public int
read()

Overrides java.io.FilterInputStream.read.

Reads the next byte of data from the input stream.

public int
read(byte[] b)

Overrides java.io.FilterInputStream.read.

Reads up to b.length bytes of data from this input stream into an array of bytes.

public int
read(byte[] b, int st, int len)

Overrides java.io.FilterInputStream.read.

Reads up to len bytes of data from this input stream into an array of bytes.

public long
skip(long n)

Overrides java.io.FilterInputStream.skip.

Skips over and discards n bytes of data from the input stream.

Inherited from java.io.FilterInputStream:
closemarkreset

Field Detail

ownerback to summary
pack-priv PNGImageDecoder owner
underlyingInputStreamback to summary
public InputStream underlyingInputStream

Constructor Detail

PNGFilterInputStreamback to summary
public PNGFilterInputStream(PNGImageDecoder owner, InputStream is)

Method Detail

availableback to summary
public int available() throws IOException

Overrides java.io.FilterInputStream.available.

Doc from java.io.FilterInputStream.available.

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. The next caller might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.

Exceptions
IOException:
if an I/O error occurs.
markSupportedback to summary
public boolean markSupported()

Overrides java.io.FilterInputStream.markSupported.

Doc from java.io.FilterInputStream.markSupported.

Tests if this input stream supports the mark and reset methods.

readback to summary
public int read() throws IOException

Overrides java.io.FilterInputStream.read.

Doc from java.io.FilterInputStream.read.

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Exceptions
IOException:
if an I/O error occurs.
readback to summary
public int read(byte[] b) throws IOException

Overrides java.io.FilterInputStream.read.

Doc from java.io.FilterInputStream.read.

Reads up to b.length bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

Exceptions
IOException:
if an I/O error occurs.
readback to summary
public int read(byte[] b, int st, int len) throws IOException

Overrides java.io.FilterInputStream.read.

Doc from java.io.FilterInputStream.read.

Reads up to len bytes of data from this input stream into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.

Exceptions
IOException:
if an I/O error occurs.
skipback to summary
public long skip(long n) throws IOException

Overrides java.io.FilterInputStream.skip.

Doc from java.io.FilterInputStream.skip.

Skips over and discards n bytes of data from the input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. The actual number of bytes skipped is returned.

Exceptions
IOException:
if in.skip(n) throws an IOException.