So, what is your question?
so, do you have more questions about the java code or is it more or less clear?
I think that @R_r_F_BR and @martin_angelo have misunderstood each other in some way. HackerRank offers on the one hand, practice tasks for programming beginners and on the other hand, the possibility for companies looking for programmers to automatically ask interview questions from a random question catalog.
So Martin got here 3 random questions from the question catalog of HackerRank as interview questions and not the exercise tasks for programming beginners.
I would like to point out again , because one must differentiate here. In my opinion, the exercise tasks for programming beginners are very recommendable.
As usual, wise words, my friend!
Pessoal, preciso de uma ajuda muito importante, o meu professor mandou fazer um projecto de java e eu estive doente e não tive tempo de estar em sala de aulas para ampreder. Gostaria que quem poder me dar uma força o faça tenho que entregar um projeto. A seguir se segui a mensagem do professor:
Saudações meus caros..
O projecto será construído com os seguintes conteúdos:
Encapsulamento
Herança
Polimorfismo
Excepção( tratamento d erro)
Interface gráfica( tem mais penso)
Tema a vosso critério.. saludos 👊🏿
Pessoal, preciso de uma ajuda muito importante, o meu professor mandou fazer um projecto de java e eu estive doente e não tive tempo de estar em sala de aulas para ampreder. Gostaria que quem poder me dar uma força o faça tenho que entregar um projeto. A seguir se segui a mensagem do professor:
Saudações meus caros..
O projecto será construído com os seguintes conteúdos:
Encapsulamento
Herança
Polimorfismo
Excepção( tratamento d erro)
Interface gráfica( tem mais penso)
Tema a vosso critério.. saludos 👊🏿
Hi. We don’t make homeworks in this group, post your specific question and probably someone will help you.
And please use English here.
And please use English here.
Good afternoon I have a project to do I need help. the project must involve: encapsulation Heritage Polymorphism Exception(error handling) Graphical interface (has more think)
Good evening. So, what is your question?
hello can someone tell me what this java code does
It looks like there’s an error, because objArray[0] is accessed and never used.
This function is encoding some piece of data into SHA-256 using bitwise operations. To be honest, this is not clear to me, it’s very low level bit handling.
objArry[0] is used when the variable „format“ is instantiated.
But I agree with @JFCostta, it seems to be some kind of encryption of the parameter of the function, the hash of the Auth key and some random data (the first for-loop. But the loop is unnecessary as the result is always the same). All these values are concatenated into one string, and this string is encrypted with SHA-256. Thereafter, the data seems to be encrypted again with a Boolean operation and an offset (256) but only the first digit of the result is saved in the string that gets returned (substring(1)).
From my understanding this code creates an encryption that is not reversible, because of this last part.
But I agree with @JFCostta, it seems to be some kind of encryption of the parameter of the function, the hash of the Auth key and some random data (the first for-loop. But the loop is unnecessary as the result is always the same). All these values are concatenated into one string, and this string is encrypted with SHA-256. Thereafter, the data seems to be encrypted again with a Boolean operation and an offset (256) but only the first digit of the result is saved in the string that gets returned (substring(1)).
From my understanding this code creates an encryption that is not reversible, because of this last part.
i need to transcribe this function in php
this cryptographic function a license plate and turns it into a hash which is validated in the backend
Just out of curiousity: do you know the reason, why the first char during the last string concatination (StringBuffer) is cut of? To me it looks like an error…
so, do you have more questions about the java code or is it more or less clear? If you do have questions, place post the code again, but with line-numbers. Then it’s easier to refer to specific places in the code.
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