File Handling

File handling in Java using FileWriter and FileReader

Java FileWriter and FileReader classes are used to write and read data from text files (they are Character Stream classes). It is recommended not to use the FileInputStream and FileOutputStream classes if you have to read and write any textual information as these are Byte stream classes.

FileWriter:

FileWriter is useful to create a file writing characters into it.This class inherits from the OutputStream class.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.FileWriter is meant for writing streams of characters. For writing streams of raw bytes, consider using a FileOutputStream.FileWriter creates the output file , if it is not present already.

Constructors:

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.