Class ByteArrayOutputStream
- All Implemented Interfaces:
- Closeable,- Flushable,- AutoCloseable
 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.
 
 This is an alternative implementation of the ByteArrayOutputStream
 class. The original implementation only allocates 32 bytes at the beginning.
 As this class is designed for heavy duty it starts at 1024 bytes. In contrast
 to the original it doesn't reallocate the whole memory block but allocates
 additional buffers. This way no buffers need to be garbage collected and
 the contents don't have to be copied to the new buffer. This class is
 designed to behave exactly like the original. The only exception is the
 deprecated toString(int) method that has been ignored.
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Constructor SummaryConstructorsConstructorDescriptionCreates a new byte array output stream.ByteArrayOutputStream(int size) Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.
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Method SummaryModifier and TypeMethodDescriptionvoidclose()Closing aByteArrayOutputStreamhas no effect.byte[]Gets the current contents of this byte stream as a byte array.voidwrite(byte[] b, int off, int len) Write the bytes to byte array.voidwrite(int b) Write a byte to byte array.voidwriteTo(OutputStream out) Writes the entire contents of this byte stream to the specified output stream.Methods inherited from class java.io.OutputStreamflush, nullOutputStream, write
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Constructor Details- 
ByteArrayOutputStreampublic ByteArrayOutputStream()Creates a new byte array output stream. The buffer capacity is initially 1024 bytes, though its size increases if necessary.
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ByteArrayOutputStreampublic ByteArrayOutputStream(int size) Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.- Parameters:
- size- the initial size
- Throws:
- IllegalArgumentException- if size is negative
 
 
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Method Details- 
writepublic void write(byte[] b, int off, int len) Write the bytes to byte array.- Overrides:
- writein class- OutputStream
- Parameters:
- b- the bytes to write
- off- The start offset
- len- The number of bytes to write
 
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writepublic void write(int b) Write a byte to byte array.- Specified by:
- writein class- OutputStream
- Parameters:
- b- the byte to write
 
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closeClosing aByteArrayOutputStreamhas no effect. The methods in this class can be called after the stream has been closed without generating anIOException.- Specified by:
- closein interface- AutoCloseable
- Specified by:
- closein interface- Closeable
- Overrides:
- closein class- OutputStream
- Throws:
- IOException- never (this method should not declare this exception but it has to now due to backwards compatibility)
 
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writeToWrites the entire contents of this byte stream to the specified output stream.- Parameters:
- out- the output stream to write to
- Throws:
- IOException- if an I/O error occurs, such as if the stream is closed
- See Also:
 
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toByteArraypublic byte[] toByteArray()Gets the current contents of this byte stream as a byte array. The result is independent of this stream.- Returns:
- the current contents of this output stream, as a byte array
- See Also:
 
 
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