Interface Appendable
- All Known Implementing Classes:
- BufferedWriter,- CharArrayWriter,- CharBuffer,- FileWriter,- FilterWriter,- LogStream,- OutputStreamWriter,- PipedWriter,- PrintStream,- PrintWriter,- StringBuffer,- StringBuilder,- StringWriter,- Writer
char sequences and values can be appended.  The
 Appendable interface must be implemented by any class whose
 instances are intended to receive formatted output from a Formatter.
  The characters to be appended should be valid Unicode characters as
 described in Unicode Character
 Representation.  Note that supplementary characters may be composed of
 multiple 16-bit char values.
 
Appendables are not necessarily safe for multithreaded access. Thread safety is the responsibility of classes that extend and implement this interface.
Since this interface may be implemented by existing classes with different styles of error handling there is no guarantee that errors will be propagated to the invoker.
- Since:
- 1.5
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Method SummaryModifier and TypeMethodDescriptionappend(char c) Appends the specified character to thisAppendable.append(CharSequence csq) Appends the specified character sequence to thisAppendable.append(CharSequence csq, int start, int end) Appends a subsequence of the specified character sequence to thisAppendable.
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Method Details- 
appendAppends the specified character sequence to thisAppendable.Depending on which class implements the character sequence csq, the entire sequence may not be appended. For instance, ifcsqis aCharBufferthen the subsequence to append is defined by the buffer's position and limit.The contents of this Appendableare unspecified if theCharSequenceis modified during the method call or an exception is thrown when accessing theCharSequence.- Parameters:
- csq- The character sequence to append. If- csqis- null, then the four characters- "null"are appended to this Appendable.
- Returns:
- A reference to this Appendable
- Throws:
- IOException- If an I/O error occurs
 
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appendAppends a subsequence of the specified character sequence to thisAppendable.An invocation of this method of the form out.append(csq, start, end)whencsqis notnull, behaves in exactly the same way as the invocationout.append(csq.subSequence(start, end))The contents of this Appendableare unspecified if theCharSequenceis modified during the method call or an exception is thrown when accessing theCharSequence.- 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:
- A reference to this Appendable
- Throws:
- IndexOutOfBoundsException- If- startor- endare negative,- startis greater than- end, or- endis greater than- csq.length()
- IOException- If an I/O error occurs
 
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appendAppends the specified character to thisAppendable.- Parameters:
- c- The character to append
- Returns:
- A reference to this Appendable
- Throws:
- IOException- If an I/O error occurs
 
 
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