- 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. TheAppendable interface must be implemented by any class whose instances are intended to receive formatted output from aFormatter. The characters to be appended should be valid Unicode characters as described inUnicode Character Representation. Note that supplementary characters may be composed of multiple 16-bitchar 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
Method Summary
Modifier 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.
Method Details
append
Appends 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. Ifcsqisnull, then the four characters"null"are appended to this Appendable.- Returns:
- A reference to this
Appendable - Throws:
IOException- If an I/O error occurs
append
Appends 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. Ifcsqisnull, then characters will be appended as ifcsqcontained the four characters"null".start- The index of the first character in the subsequenceend- The index of the character following the last character in the subsequence- Returns:
- A reference to this
Appendable - Throws:
IndexOutOfBoundsException- Ifstartorendare negative,startis greater thanend, orendis greater thancsq.length()IOException- If an I/O error occurs
append
Appends 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