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| java.lang.Object
 java.io.OutputStream
java.io.ByteArrayOutputStream
| ByteArrayOutputStream | | public class ByteArrayOutputStream extends OutputStream (Code) | | This class implements an output stream in which the data is
written into a byte array. The buffer automatically grows as data
is written to it.
The data can be retrieved using toByteArray() and
toString().
Closing a ByteArrayOutputStream has no effect. The methods in
this class can be called after the stream has been closed without
generating an IOException.
author:
Arthur van Hoff
version:
1.59, 05/05/07
since:
JDK1.0 |
| Field Summary | |
| protected byte | buf
The buffer where data is stored. | | protected int | count
The number of valid bytes in the buffer. |
| Constructor Summary | |
| public | ByteArrayOutputStream()
Creates a new byte array output stream. | | public | ByteArrayOutputStream(int size)
Creates a new byte array output stream, with a buffer capacity of
the specified size, in bytes. |
| Method Summary | |
| public void | close()
Closing a ByteArrayOutputStream has no effect. | | public synchronized void | reset()
Resets the count field of this byte array output
stream to zero, so that all currently accumulated output in the
output stream is discarded. | | public synchronized int | size()
Returns the current size of the buffer. | | public synchronized byte | toByteArray()
Creates a newly allocated byte array. | | public synchronized String | toString()
Converts the buffer's contents into a string decoding bytes using the
platform's default character set. | | public synchronized String | toString(String charsetName)
Converts the buffer's contents into a string by decoding the bytes using
the specified
java.nio.charset.Charset charsetName . | | public synchronized String | toString(int hibyte)
Creates a newly allocated string. | | public synchronized void | write(int b)
Writes the specified byte to this byte array output stream. | | public synchronized void | write(byte b, int off, int len)
Writes len bytes from the specified byte array
starting at offset off to this byte array output stream. | | public synchronized void | writeTo(OutputStream out)
Writes the complete contents of this byte array output stream to
the specified output stream argument, as if by calling the output
stream's write method using out.write(buf, 0, count). |
| buf | | protected byte buf(Code) | | The buffer where data is stored.
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| count | | protected int count(Code) | | The number of valid bytes in the buffer.
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| ByteArrayOutputStream | | public ByteArrayOutputStream()(Code) | | Creates a new byte array output stream. The buffer capacity is
initially 32 bytes, though its size increases if necessary.
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| ByteArrayOutputStream | | public ByteArrayOutputStream(int size)(Code) | | Creates a new byte array output stream, with a buffer capacity of
the specified size, in bytes.
Parameters:
size - the initial size.
exception:
IllegalArgumentException - if size is negative. |
| close | | public void close() throws IOException(Code) | | Closing a ByteArrayOutputStream has no effect. The methods in
this class can be called after the stream has been closed without
generating an IOException.
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| reset | | public synchronized void reset()(Code) | | Resets the count field of this byte array output
stream to zero, so that all currently accumulated output in the
output stream is discarded. The output stream can be used again,
reusing the already allocated buffer space.
See Also: java.io.ByteArrayInputStream.count |
| size | | public synchronized int size()(Code) | | Returns the current size of the buffer.
the value of the count field, which is the numberof valid bytes in this output stream.
See Also: java.io.ByteArrayOutputStream.count |
| toByteArray | | public synchronized byte toByteArray()(Code) | | Creates a newly allocated byte array. Its size is the current
size of this output stream and the valid contents of the buffer
have been copied into it.
the current contents of this output stream, as a byte array.
See Also: java.io.ByteArrayOutputStream.size |
| toString | | public synchronized String toString()(Code) | | Converts the buffer's contents into a string decoding bytes using the
platform's default character set. The length of the new String
is a function of the character set, and hence may not be equal to the
size of the buffer.
This method always replaces malformed-input and unmappable-character
sequences with the default replacement string for the platform's
default character set. The
class should be used when more control over the decoding process is
required.
String decoded from the buffer's contents.
since:
JDK1.1 |
| toString | | public synchronized String toString(String charsetName) throws UnsupportedEncodingException(Code) | | Converts the buffer's contents into a string by decoding the bytes using
the specified
java.nio.charset.Charset charsetName . The length of
the new String is a function of the charset, and hence may not be
equal to the length of the byte array.
This method always replaces malformed-input and unmappable-character
sequences with this charset's default replacement string. The
java.nio.charset.CharsetDecoder class should be used when more control
over the decoding process is required.
Parameters:
charsetName - the name of a supported String decoded from the buffer's contents.
exception:
UnsupportedEncodingException - If the named charset is not supported
since:
JDK1.1 |
| toString | | public synchronized String toString(int hibyte)(Code) | | Creates a newly allocated string. Its size is the current size of
the output stream and the valid contents of the buffer have been
copied into it. Each character c in the resulting string is
constructed from the corresponding element b in the byte
array such that:
c == (char)(((hibyte & 0xff) << 8) | (b & 0xff))
Parameters:
hibyte - the high byte of each resulting Unicode character. the current contents of the output stream, as a string.
See Also: java.io.ByteArrayOutputStream.size
See Also: java.io.ByteArrayOutputStream.toString(String)
See Also: java.io.ByteArrayOutputStream.toString |
| write | | public synchronized void write(int b)(Code) | | Writes the specified byte to this byte array output stream.
Parameters:
b - the byte to be written. |
| write | | public synchronized void write(byte b, int off, int len)(Code) | | Writes len bytes from the specified byte array
starting at offset off to this byte array output stream.
Parameters:
b - the data.
Parameters:
off - the start offset in the data.
Parameters:
len - the number of bytes to write. |
| writeTo | | public synchronized void writeTo(OutputStream out) throws IOException(Code) | | Writes the complete contents of this byte array output stream to
the specified output stream argument, as if by calling the output
stream's write method using out.write(buf, 0, count).
Parameters:
out - the output stream to which to write the data.
exception:
IOException - if an I/O error occurs. |
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