Tutorial Addendum on Data Encoding - UUEncode Encoding

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 31 December 18:00   

    



    



    

Sun implemented UUEncode algorithm with 2 classes, UUEncoder and UUDecoder, in sun.misc

    

package in the JDK distribution. The afterward program shows you how to use these

    

2 classes:

    

 

    

/**

    

* SunUUEncode. java

    

* Absorb (c) 2002 by Dr. Yang

    

*/

    

import java .io.*;

    

import sun.misc.*;

    

class SunUUEncode {

    

accessible changeless abandoned main(String[] a) {

    

Cord activity = a[0];

    

Cord inFile = a[1];

    

Cord outFile = a[2];

    

if (action.equals("encode")) {

    

encode(inFile,outFile);

    

} abroad if (action.equals("decode")) {

    

decode(inFile,outFile);

    

} abroad {

    

System.out.println("Please adjure the program with:");

    

System.out.println(" java SunUUEncode encode/decode in out");

    

}

    

}

    

clandestine changeless abandoned encode(String inFile, Cord outFile) {

    

try {

    

UUEncoder uuec = new UUEncoder(inFile);

    

InputStream in = new FileInputStream(inFile);

    

OutputStream out = new FileOutputStream(outFile);

    

uuec.encodeBuffer(in, out);

    

in.close();

    

out.close();

    

} bolt (IOException e) {

    

System.out.println(e.toString());

    

}

    

}

    

clandestine changeless abandoned decode(String inFile, Cord outFile) {

    

try {

    

UUDecoder uudc = new UUDecoder();

    

InputStream in = new FileInputStream(inFile);

    

OutputStream out = new FileOutputStream(outFile);

    

uudc.decodeBuffer(in, out);

    

in.close();

    

out.close();

    

} bolt (IOException e) {

    

System.out.println(e.toString());

    

}

    

}

    

}

    



    



    

Let s try this program with JDK 1.3.1 by encoding and adaptation the java chic book produced by the Java

    

compiler:

    

 

    

javac SunUUEncode.java

    

java SunUUEncode encode SunUUEncode.class SunUUEncode.uu

    

type SunUUEncode.uu

    

java SunUUEncode break SunUUEncode.uu SunUUEncode.cls

    

del SunUUEncode.class

    

ren SunUUEncode.uu SunUUEncode.class

    

java SunUUEncode abc in out

    



    



    

As you can see from the "type SunUUEncode.uu" command, the encoded achievement is accurately formatted

    

with 61 characters per line:

    

 

    

begin 644 SunUUEncode.class

    

MROZZO@ # "T 5@H &@ F" A"@ G "@* !D *0@ (PH &0 J"0 K "P( "T*

    

M "X +P@ , < ,0H "P R!P S"@ - #( #0* ,@H -0 V"@ W #@* #D

    

M. < .@H .P !P ]"@ 6 "8* #X /P< 0 < 00$ !CQI;FET/@$ R@I5@$

    

M!$-O9&4! ],:6YE3G5M8F5R5&%B;&4! 1M86EN 0 6*%M,:F%V82]L86YG

    

M+U-T<FEN9SLI5@$ !F5N8V]D90$ )RA,:F%V82]L86YG+U-T<FEN9SM,:F%V

    

M82]L86YG+U-T<FEN9SLI5@$ !F1E8V]D90$ "E-O=7)C949I;&4! !!3=6Y5

    

M545N8V]D92YJ879A# ; !P $(, $, 1 P (0 B# C "( $4, $8 1P$

    

M U!L96%S92!I;G9O:V4@=&AE( !R;V=R86T@=VET:#H $@, $D 2@$ *" @

    

M(&IA=F$@4W5N555%;F-O9&4@96YC;V1E+V1E8V]D92!I;B!O=70! !)S=6XO

    

M;6ES8R]5545N8V]D97(, !L 2@$ %VIA=F$O:6O1FEL94EN< 5T4W1R96%M

    

M 0 8:F%V82]I;R]&:6QE3W5T< 5T4W1R96%M!P!+# !, $T $X, $ <

    

M4 $ $VIA=F$O:6O24]%>&-E< 1I;VX %$, %( 4P$ $G-U;B]M:7-C+U55

    

M1&5C;V1E<@< 5 P 50!- 0 +4W5N555%;F-O9&4! !!J879A+VQA;F<O3V)J

    

M96-T 0 0:F%V82]L86YG+U-T<FEN9P$ !F5Q=6%L<P$ %2A,:F%V82]L86YG

    

M+T]B:F5C=#LI6@$ $&IA=F$O;&%N9R]3>7-T96T! -O=70! !5,:F%V82]I

    

M;R]0<FEN=%-T<F5A;3L! !-J879A+VEO+U!R:6YT4W1R96%M 0 < )I;G1L

    

M;@$ %2A,:F%V82]L86YG+U-T<FEN9SLI5@$ &7-U;B]M:7-C+T-H87)A8W1E

    

M<D5N8V]D97(! QE;F-O9&5"=69F97(! "XH3&IA=F$O:6O26YP=713= )E

    

M86T[3&IA=F$O:6O3W5T< 5T4W1R96%M.RE6 0 3:F%V82]I;R]);G!U=%-T

    

M<F5A;0$ !6-L;W-E 0 4:F%V82]I;R]/=71P=713= )E86T! !-J879A+VQA

    

M;F<O5&AR;W=A8FQE 0 (=&]3= )I;F<! !0H*4QJ879A+VQA;F<O4W1R:6YG

    

M.P$ &7-U;B]M:7-C+T-H87)A8W1E<D1E8V]D97(! QD96-O9&5"=69F97(

    

M( 9 !H 0 ; !P 0 = 0 ! $ %*K< ;$ ! !X

    

M & $ D P @ $ 0 L @ $ /RH#,DPJ!#)-*@4R3BL2

    

M K8 YD "RPMN $IP D*Q(%M@ #F0 ++"VX :G !.R <2"+8 ";( !Q(*

    

MM@ )L0 $ @ "H "@ D ! * @ "P , P %0 - !T #@ F

    

M+@ 1 #8 $@ ^ !0 "@ A "( 0 = =P # 4 [NP +62JW Q-NP -

    

M62JW Y.NP /62NW ! Z!"PM&02V !$MM@ 2&02V !.G Y-L@ ++8 %;8

    

M";$ 0 "P +P 4 $ @ "( " !< "0 8 !( &0 < !H (P ; "<

    

M O !X .@ @ H (P B $ 0 8 P % .KL %EFW !=-NP -62JW

    

M Y.NP /62NW ! Z!"PM&02V !@MM@ 2&02V !.G Y-L@ ++8 %;8 ";$

    

M 0 "L +@ 4 $ @ "( " ", " D !$ )0 ; "8 (@ G "8 * N

    

0 "H .0 L $ ) ( )0$!

    



    

end

    



    



    

However, there seems to be a problem with the decoded adaptation of my class.

    

It gave me the afterward error:

    

 

    

java SunUUEncode abc in out

    

Exception in cilia "main" java.lang.ClassFormatError: SunUUEncode

    

(Bad abracadabra number)

    

at java.lang.ClassLoader.defineClass0(Native Method)

    

at java.lang.ClassLoader.defineClass(ClassLoader.java:486)

    

...

    



    



    



    

Sun Accomplishing Correction

    



    

To acquisition out what s amiss with Sun s accomplishing of the adaptation algorithm,

    

I went to Internet, and begin the antecedent cipher of UUDecode.java at

    

http://www.cs.duke.edu/csed/java/src1.3/sun/misc:

    



    

 


Tags: action, program, system, class, string

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