Java

Re: Java Linked Lists (JAVA Beginner in need of help)

20-Apr-13 23:30

Member 10001837 wrote:
I'm just a beginner in Java Programming

Then you should start with some of the tutorials[^].

Use the best guess

Varad Velingkar23-Apr-13 7:41

Varad Velingkar

23-Apr-13 7:41

You can use the LinkedList Class from Collections Interface.

Re: Java Linked Lists (JAVA Beginner in need of help)

sriniprabhu27-Apr-13 1:58

sriniprabhu

27-Apr-13 1:58

I think Collections is a implementation class not an interface where all the following methods implemented.

sort,binarysearch,max,min,emptyList,emptySet,etc....

Collection is an super interface for all the interfaces Set,List,Map..

Re: Java Linked Lists (JAVA Beginner in need of help)

bakary.konate27-Apr-13 10:32

bakary.konate

27-Apr-13 10:32

Use LinkedList from Java Collection Framework like in the following:
// create your class
public class MyItem {
.......
........
}

//Instantiate your object
MyItem item = new MyItem();

List<myitem> myList = new LinkedList<myitem>();

myList.add(item);

how to call webservice in java using javascript with example link

Member 999857419-Apr-13 8:02

Member 9998574

19-Apr-13 8:02

how to call webservice in java using javascript with example link

Re: how to call webservice in java using javascript with example link

Richard MacCutchan19-Apr-13 9:13

19-Apr-13 9:13

You need to provide a lot more detail of your problem. Alternatively a bit of Google searching will most likely yield some useful information.

Use the best guess

java

Tyga Von Brown16-Apr-13 9:02

Tyga Von Brown

16-Apr-13 9:02

Uum..... i kinda need help on deal on makin animation using java

Stifler

Re: java

Richard MacCutchan16-Apr-13 9:36

OneWay hash encryption error in different Os.

16-Apr-13 9:36

So are you expecting us to guess what kind of help?

Use the best guess

Re: java

NotPolitcallyCorrect16-Apr-13 10:14

NotPolitcallyCorrect

16-Apr-13 10:14

Uhm, you probably should start with this[^]

Re: java

Shubhashish_Mandal26-Apr-13 0:00

Shubhashish_Mandal

26-Apr-13 0:00

What kind of animation you need.

Regards
Shubhashish

saigowthami15-Apr-13 1:27

15-Apr-13 1:27

Hello,

When i am encrypting a string (One way hashed) using SHA algorithm, the output differs from two different platforms.

When done in windows, an extra CR (CR LF) character is appearing but when done in linux box only LF character is appearing in between the output encrypted value.

FYI - CR (enter) LF(Space)

This leading me with issues in further process of application.

Kindly help for the same

Gowthami

Richard MacCutchan15-Apr-13 2:18

15-Apr-13 2:18

This has nothing to do with encryption. The CR LF sequence is set in Windows wherever the output string of a printf() format contains the \n control. In linux (and UNIX) it is replaced with a single LF.

Use the best guess

saigowthami15-Apr-13 19:31

15-Apr-13 19:31

No it is not about the last character of string.

see for example if i do one way hash for '1234567890127866'

have a look on the outputs

Windows:
+zWcE7pR4k97ysyi54WS4G6J1Qjfp/tXllE23mMLCFBrIONMlrXyMw9aF1UCFKCFjbcz0Yzge78u(THIS IS THE PLACE WHERE I M GETTING CR LF)Usye+/4Ulw==

Linux:
+zWcE7pR4k97ysyi54WS4G6J1Qjfp/tXllE23mMLCFBrIONMlrXyMw9aF1UCFKCFjbcz0Yzge78u(THIS IS THE PLACE WHERE I M GETTING ONLY LF)Usye+/4Ulw==

which means the whole characters represents single string

Regards
Gowthami

Richard MacCutchan15-Apr-13 22:00

15-Apr-13 22:00

I have just tried the same test and get a completely different result ([B@1748ba4), so I can only assume that there is some more information that you have not given us.

Use the best guess

saigowthami15-Apr-13 23:09

15-Apr-13 23:09

meaning?? have you tried to encrypt the string in both windows and linux??

md = MessageDigest.getInstance("SHA-512");
            md.update(plaintext.getBytes("UTF-8"));

            byte raw[] = md.digest();

            String hash = (new BASE64Encoder()).encode(raw);

            return hash;

This is what I have used to encrypt

Richard MacCutchan15-Apr-13 23:21

15-Apr-13 23:21

saigowthami wrote:
meaning??

Meaning that all you showed us was the source data and the resulting hash value, we had no idea what code you had used.

Use the best guess

saigowthami15-Apr-13 23:24

15-Apr-13 23:24

Ya i have posted my code in my previous reply itself

Richard MacCutchan15-Apr-13 23:38

15-Apr-13 23:38

I cannot find BASE64Encoder so cannot try recreating your problem. However, as Bernhard explained in this response[^], these extra line terminators are added when you convert the data to a string. Keep it as a byte[] and see if you still have the problem.

Use the best guess

Bernhard Hiller15-Apr-13 21:39

Bernhard Hiller

15-Apr-13 21:39

See the answer to a question on StackOverflow: http://stackoverflow.com/questions/2620975/strange-n-in-base64-encoded-string-in-ruby[^]: "... add a newline for every 60th character ..."
And see also http://en.wikipedia.org/wiki/Base64[^]
That means that the new lines do not contain meaning, they are used for formatting purposes only. Before comparing the strings, you remove all types of newlines, and things will work fine (some decoders for base64 may require newlines, but since you need to compare hashed values only, that does not matter).

saigowthami15-Apr-13 23:23

15-Apr-13 23:23

ok but my database is in linux machine, where the strings encrypted and saved to database,

while i m running the same encryption util in linux the output is not matching with the database one.

Meanwhile both places the code is same to encrypt the string.

Java application to transfer files and folders

Bernhard Hiller16-Apr-13 3:12

Bernhard Hiller

16-Apr-13 3:12

Look:
- before you store the value in the database, remove all newlines.
- before you compare a value with a value from the db, remove all newlines.
That works.
Of course, you have to update your databse in case that you have some entries there already.

saigowthami15-Apr-13 1:20

Re: Java application to transfer files and folders

15-Apr-13 1:20

Hello,

I am trying to code an application, like sync operation between two machines to transfer the files and folders through internet. Is it possible to use ftp or any other in java and write the application?

Regards
Gowthami

Prasad Khandekar26-Apr-13 0:19

Prasad Khandekar

26-Apr-13 0:19

It's definitely possible. You can use FTP server on one machine and use a java program to synchronize a local folder with remote folder on FTP server. The FTP Server must be accessible from internet.

Other way is to write your own socket server implementation and use it for synchronization. Unlike the first implementation, this will allow you to initiate synchronization from either machine. With first it will be always from the machine on which java program is running.

Regards,

Prasad P. Khandekar
Knowledge exists, man only discovers it.

Re: Java application to transfer files and folders

saigowthami27-Apr-13 2:41