Java Learning--file stream FileReader and FileWriter applications

* Copy of text files can be achieved using FileReader and FileWriter.
* For non-text files (video files, audio files, pictures), only the byte stream can be used!

1 @Test2      Public voidTestfilereader () {3FileReader FR =NULL;4         Try {5File File =NewFile ("Dbcp.txt");6FR =Newfilereader (file);7             Char[] C =New Char[24];8             intLen;9              while(len = Fr.read (c))! =-1){TenString str =NewString (c, 0, Len); One System.out.print (str); A             } -}Catch(IOException e) { -             //TODO auto-generated Catch block the e.printstacktrace (); -}finally{ -             if(FR! =NULL){ -                 Try { + fr.close (); -}Catch(IOException e) { +                     //TODO auto-generated Catch block A e.printstacktrace (); at                 } -             } -         } -          -}

1 @Test2      Public voidTestfilereaderwriter () {3         //1. Input stream corresponding file src must exist, otherwise throw an exception. The output stream corresponding to the file dest can not exist, the execution process will be automatically created4FileReader FR =NULL;5FileWriter FW =NULL;6         Try{7             //cannot implement a copy of a non-text file8 //file src = new file ("C:\\users\\shkstart\\desktop\\1.jpg");9 //file Dest = new file ("C:\\users\\shkstart\\desktop\\3.jpg");TenFile src =NewFile ("Dbcp.txt"); OneFile dest =NewFile ("Dbcp1.txt"); A             //2. -FR =NewFileReader (SRC); -FW =NewFileWriter (dest); the             //3. -             Char[] C =New Char[24]; -             intLen; -              while(len = Fr.read (c))! =-1){ +Fw.write (c, 0, Len); -             } +}Catch(Exception e) { A e.printstacktrace (); at}finally{ -             if(FW! =NULL){ -                 Try { - fw.close (); -}Catch(IOException e) { -                     //TODO auto-generated Catch block in e.printstacktrace (); -                 } to             } +             if(FR! =NULL){ -                 Try { the fr.close (); *}Catch(IOException e) { $                     //TODO auto-generated Catch blockPanax Notoginseng e.printstacktrace (); -                 } the             } +         } A}

Java Learning--file stream FileReader and FileWriter applications