Class FileWriter
java.lang.Object
java.io.Writer
java.io.OutputStreamWriter
java.io.FileWriter
- All Implemented Interfaces:
Closeable,Flushable,Appendable,AutoCloseable
Writes text to character files using a default buffer size. Encoding from characters
to bytes uses either a specified charset
or the default charset.
Whether or not a file is available or may be created depends upon the
underlying platform. Some platforms, in particular, allow a file to be
opened for writing by only one FileWriter (or other file-writing
object) at a time. In such situations the constructors in this class
will fail if the file involved is already open.
The FileWriter is meant for writing streams of characters. For writing
streams of raw bytes, consider using a FileOutputStream.
- Since:
- 1.1
- See Also:
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Field Summary
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Constructor Summary
ConstructorsConstructorDescriptionFileWriter(File file) Constructs aFileWritergiven a file descriptor, using the default charset.FileWriter(File file, boolean append) Constructs aFileWritergiven theFileto write and a boolean indicating whether to append the data written, using the default charset.FileWriter(File file, Charset charset) FileWriter(File file, Charset charset, boolean append) Constructs aFileWritergiven theFileto write, charset and a boolean indicating whether to append the data written.FileWriter(String fileName) Constructs aFileWritergiven a file name, using the default charsetFileWriter(String fileName, boolean append) Constructs aFileWritergiven a file name and a boolean indicating whether to append the data written, using the default charset.FileWriter(String fileName, Charset charset) Constructs aFileWritergiven a file name and charset.FileWriter(String fileName, Charset charset, boolean append) Constructs aFileWritergiven a file name, charset and a boolean indicating whether to append the data written. -
Method Summary
Methods declared in class java.io.OutputStreamWriter
close, flush, getEncoding, write, write, write
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Constructor Details
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FileWriter
Constructs aFileWritergiven a file name, using the default charset- Parameters:
fileName- String The system-dependent filename.- Throws:
IOException- if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- See Also:
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FileWriter
Constructs aFileWritergiven a file name and a boolean indicating whether to append the data written, using the default charset.- Parameters:
fileName- String The system-dependent filename.append- boolean iftrue, then data will be written to the end of the file rather than the beginning.- Throws:
IOException- if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- See Also:
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FileWriter
- Parameters:
file- theFileto write.- Throws:
IOException- if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- See Also:
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FileWriter
Constructs aFileWritergiven theFileto write and a boolean indicating whether to append the data written, using the default charset.- Parameters:
file- theFileto writeappend- iftrue, then bytes will be written to the end of the file rather than the beginning- Throws:
IOException- if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- Since:
- 1.4
- See Also:
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FileWriter
Constructs aFileWritergiven a file descriptor, using the default charset.- Parameters:
fd- theFileDescriptorto write.- See Also:
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FileWriter
Constructs aFileWritergiven a file name and charset.- Parameters:
fileName- the name of the file to writecharset- the charset- Throws:
IOException- if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- Since:
- 11
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FileWriter
Constructs aFileWritergiven a file name, charset and a boolean indicating whether to append the data written.- Parameters:
fileName- the name of the file to writecharset- the charsetappend- a boolean. Iftrue, the writer will write the data to the end of the file rather than the beginning.- Throws:
IOException- if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- Since:
- 11
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FileWriter
- Parameters:
file- theFileto writecharset- the charset- Throws:
IOException- if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- Since:
- 11
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FileWriter
Constructs aFileWritergiven theFileto write, charset and a boolean indicating whether to append the data written.- Parameters:
file- theFileto writecharset- the charsetappend- a boolean. Iftrue, the writer will write the data to the end of the file rather than the beginning.- Throws:
IOException- if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason- Since:
- 11
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