在Java 中FileReader与FileWriter有哪些区别

  package java.io; public class FileReader extends InputStreamReader {   public FileReader(String fileName) throws FileNotFoundException {     super(new FileInputStream(fil java io系列21之 InputStreamReader和OutputStreamWritereName));   }   public FileReader(File file) throws FileNotFoundException {     super(new FileInputStream(file));   }   public FileReader(FileDescriptor fd) {     super(new FileInputStream(fd));   } }