Appendable (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档
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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang
Interface Appendable
- All Known Implementing Classes:
- BufferedWriter, CharArrayWriter, CharBuffer, FileWriter, FilterWriter, LogStream, OutputStreamWriter, PipedWriter, PrintStream, PrintWriter, StringBuffer, StringBuilder, StringWriter, Writer
public interface Appendable
An object to which 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
| Method Summary | |
|---|---|
Appendable |
append(char c)
Appends the specified character to this Appendable. |
Appendable |
append(CharSequence csq)
Appends the specified character sequence to this Appendable. |
Appendable |
append(CharSequence csq,
int start,
int end)
Appends a subsequence of the specified character sequence to this Appendable. |
| Method Detail |
|---|
append
Appendable append(CharSequence csq) throws IOException
- Appends the specified character sequence to this Appendable.
Depending on which class implements the character sequence csq, the entire sequence may not be appended. For instance, if csq is a
CharBufferthen the subsequence to append is defined by the buffer's position and limit.- Parameters:
csq- The character sequence to append. If csq is 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
append
Appendable append(CharSequence csq, int start, int end) throws IOException
- Appends a subsequence of the specified character sequence to this
Appendable.
An invocation of this method of the form out.append(csq, start, end) when csq is not null, behaves in exactly the same way as the invocation
out.append(csq.subSequence(start, end))- Parameters:
csq- The character sequence from which a subsequence will be appended. If csq is null, then characters will be appended as if csq contained 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- If start or end are negative, start is greater than end, or end is greater than csq.length()IOException- If an I/O error occurs
append
Appendable append(char c) throws IOException
- Appends the specified character to this Appendable.
- Parameters:
c- The character to append- Returns:
- A reference to this Appendable
- Throws:
IOException- If an I/O error occurs
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JavaTM 2 Platform Standard Ed. 5.0 |
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.