Class FileWriter
- java.lang.Object
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- java.io.Writer
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- java.io.OutputStreamWriter
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- java.io.FileWriter
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- All Implemented Interfaces:
- Closeable, Flushable, Appendable, AutoCloseable
public class FileWriter extends OutputStreamWriter
Convenience class for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.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.
FileWriteris meant for writing streams of characters. For writing streams of raw bytes, consider using aFileOutputStream.- Since:
- JDK1.1
- See Also:
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OutputStreamWriter,FileOutputStream
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Constructor Summary
Constructors Constructor and Description FileWriter(File file)Constructs a FileWriter object given a File object.FileWriter(File file, boolean append)Constructs a FileWriter object given a File object.FileWriter(FileDescriptor fd)Constructs a FileWriter object associated with a file descriptor.FileWriter(String fileName)Constructs a FileWriter object given a file name.FileWriter(String fileName, boolean append)Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.
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Method Summary
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Methods inherited from class java.io.OutputStreamWriter
close, flush, getEncoding, write, write, write
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Constructor Detail
FileWriter
public FileWriter(String fileName) throws IOException
Constructs a FileWriter object given a file name.- Parameters:
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fileName- String The system-dependent filename. - Throws:
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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
FileWriter
public FileWriter(String fileName, boolean append) throws IOException
Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.- Parameters:
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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:
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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
FileWriter
public FileWriter(File file) throws IOException
Constructs a FileWriter object given a File object.- Parameters:
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file- a File object to write to. - Throws:
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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
FileWriter
public FileWriter(File file, boolean append) throws IOException
Constructs a FileWriter object given a File object. If the second argument istrue, then bytes will be written to the end of the file rather than the beginning.- Parameters:
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file- a File object to write to -
append- iftrue, then bytes will be written to the end of the file rather than the beginning - Throws:
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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
FileWriter
public FileWriter(FileDescriptor fd)
Constructs a FileWriter object associated with a file descriptor.- Parameters:
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fd- FileDescriptor object to write to.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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