FileReader

FileReader

java.io

---

Java 1.1

readable closeable

FileReader is a convenience subclass of InputStreamReader that is useful when you want to read text (as opposed to binary data) from a file. You create a FileReader by specifying the file to be read in any of three possible forms. The FileReader constructor internally creates a FileInputStream to read bytes from the specified file and uses the functionality of its superclass, InputStreamReader , to convert those bytes from characters in the local encoding to the Unicode characters used by Java. Because FileReader is a trivial subclass of InputStreamReader , it does not define any read( ) methods or other methods of its own. Instead, it inherits all its methods from its superclass. If you want to read Unicode characters from a file that uses some encoding other than the default encoding for the locale, you must explicitly create your own InputStreamReader to perform the byte-to-character conversion.

Figure 9-19. java.io.FileReader

 public class  FileReader  extends InputStreamReader {  // Public Constructors  public  FileReader  (FileDescriptor  fd  );        public  FileReader  (File  file  ) throws FileNotFoundException;        public  FileReader  (String  fileName  ) throws FileNotFoundException;   }