Class CharArrayWriter
- All Implemented Interfaces:
- Closeable,- Flushable,- Appendable,- AutoCloseable
Note: Invoking close() on this class has no effect, and methods of this class can be called after the stream has closed without generating an IOException.
- Since:
- 1.1
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Field SummaryFieldsModifier and TypeFieldDescriptionprotected char[]The buffer where data is stored.protected intThe number of chars in the buffer.
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Constructor SummaryConstructorsConstructorDescriptionCreates a new CharArrayWriter.CharArrayWriter(int initialSize) Creates a new CharArrayWriter with the specified initial size.
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Method SummaryModifier and TypeMethodDescriptionappend(char c) Appends the specified character to this writer.append(CharSequence csq) Appends the specified character sequence to this writer.append(CharSequence csq, int start, int end) Appends a subsequence of the specified character sequence to this writer.voidclose()Close the stream.voidflush()Flush the stream.voidreset()Resets the buffer so that you can use it again without throwing away the already allocated buffer.intsize()Returns the current size of the buffer.char[]Returns a copy of the input data.toString()Converts input data to a string.voidwrite(char[] c, int off, int len) Writes characters to the buffer.voidwrite(int c) Writes a character to the buffer.voidWrite a portion of a string to the buffer.voidWrites the contents of the buffer to another character stream.Methods declared in class java.io.WriternullWriter, write, write
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Field Details- 
bufprotected char[] bufThe buffer where data is stored.
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countprotected int countThe number of chars in the buffer.
 
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Constructor Details- 
CharArrayWriterpublic CharArrayWriter()Creates a new CharArrayWriter.
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CharArrayWriterpublic CharArrayWriter(int initialSize) Creates a new CharArrayWriter with the specified initial size.- Parameters:
- initialSize- an int specifying the initial buffer size.
- Throws:
- IllegalArgumentException- if initialSize is negative
 
 
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Method Details- 
write
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writepublic void write(char[] c, int off, int len) Writes characters to the buffer.- Specified by:
- writein class- Writer
- Parameters:
- c- the data to be written
- off- the start offset in the data
- len- the number of chars that are written
- Throws:
- IndexOutOfBoundsException- If- offis negative, or- lenis negative, or- off + lenis negative or greater than the length of the given array
 
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writeWrite a portion of a string to the buffer.- Overrides:
- writein class- Writer
- Parameters:
- str- String to be written from
- off- Offset from which to start reading characters
- len- Number of characters to be written
- Throws:
- IndexOutOfBoundsException- If- offis negative, or- lenis negative, or- off + lenis negative or greater than the length of the given string
 
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writeToWrites the contents of the buffer to another character stream.- Parameters:
- out- the output stream to write to
- Throws:
- IOException- If an I/O error occurs.
 
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appendAppends the specified character sequence to this writer.An invocation of this method of the form out.append(csq)whencsqis notnull, behaves in exactly the same way as the invocationout.write(csq.toString())Depending on the specification of toStringfor the character sequencecsq, the entire sequence may not be appended. For instance, invoking thetoStringmethod of a character buffer will return a subsequence whose content depends upon the buffer's position and limit.- Specified by:
- appendin interface- Appendable
- Overrides:
- appendin class- Writer
- Parameters:
- csq- The character sequence to append. If- csqis- null, then the four characters- "null"are appended to this writer.
- Returns:
- This writer
- Since:
- 1.5
 
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appendAppends a subsequence of the specified character sequence to this writer.An invocation of this method of the form out.append(csq, start, end)whencsqis notnull, behaves in exactly the same way as the invocationout.write(csq.subSequence(start, end).toString())- Specified by:
- appendin interface- Appendable
- Overrides:
- appendin class- Writer
- Parameters:
- csq- The character sequence from which a subsequence will be appended. If- csqis- null, then characters will be appended as if- csqcontained the four characters- "null".
- start- The index of the first character in the subsequence
- end- The index of the character following the last character in the subsequence
- Returns:
- This writer
- Throws:
- IndexOutOfBoundsException- If- startor- endare negative,- startis greater than- end, or- endis greater than- csq.length()
- Since:
- 1.5
 
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appendAppends the specified character to this writer.An invocation of this method of the form out.append(c)behaves in exactly the same way as the invocationout.write(c)- Specified by:
- appendin interface- Appendable
- Overrides:
- appendin class- Writer
- Parameters:
- c- The 16-bit character to append
- Returns:
- This writer
- Since:
- 1.5
 
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resetpublic void reset()Resets the buffer so that you can use it again without throwing away the already allocated buffer.
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toCharArraypublic char[] toCharArray()Returns a copy of the input data.- Returns:
- an array of chars copied from the input data.
 
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sizepublic int size()Returns the current size of the buffer.- Returns:
- an int representing the current size of the buffer.
 
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toString
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flush
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closepublic void close()Close the stream. This method does not release the buffer, since its contents might still be required. Note: Invoking this method in this class will have no effect.
 
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