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Replied To a Post in JAVA Checking 10th place in a 2d Arraylist
Hint (also applies to your other thread): You can get the nth element in a List as follows: `list.get(n)` -
Replied To a Post in Calculating distance with arraylist
take a moment to think through the value(s) of j on lines 6 and 7. on each pass of the loop you do the whole calculation for just one value … -
Replied To a Post in adobe phtostoshop
Go to adobe.com and purchase the kind of licence that suits you best. -
Gave Reputation to hemoram631 in General Information
Check these things on the PC where you want to install Windows 10: 64-bit or 32-bit processor (CPU). You'll create either the 64-bit or 32-bit version of Windows 10 that's … -
Replied To a Post in General Information
What exactly is the point of this? How many people are going to do a clean install of WIndows 10 on a 32 bit machine in 2021? To quote Microsoft: … -
Replied To a Post in How to use my undo/redo bottom from my other view?
Which line and variable does the NPE refer to? -
Replied To a Post in can anyone help me to translate this c++ into pseudocode?
looks like a simple array sort to me. If so the pseudo code is already well known and you just have to match it to the details of this implementation -
Replied To a Post in i'm having trouble with this question if anyone can help me to solve
The instructions are almost pseudo-code for the actual solution. Each sentence represents a few lines of code, all in the right order. So start with "Read from the user the … -
Replied To a Post in javac: file not found: C:\Program Files\Java\Main.java
It seems like it's looking for your java file in the wrong place. It's looking in c:\Program Files\java, presumably because that's your working directory (?). That's a really bad place … -
Replied To a Post in A simple encryption scheme
Now that the algorithm is sealed, I’ve indulged my love of structuring code for maximum clarity and maintainability, and made a Java version accordingly. The structure follows the short spec: … -
Replied To a Post in help my code is wrong
Its a very bad idea to have multiple Scanners usig the same input stream (System.in). You never know which Scanner will read the next character from the stream, or which … -
Replied To a Post in A simple encryption scheme
That looks good to me. -
Replied To a Post in A simple encryption scheme
It's necessary that the receiver can generate the same sequesnce of keys as the sender, otherwize he can't decode the message. If you use a random salt and don't share … -
Replied To a Post in A simple encryption scheme
I read about code re-use with an XORed stream, and that left me worried. Given 2 Messages M1 and M2 and a stream of bytes S such as we get … -
Replied To a Post in A simple encryption scheme
Hello again - I thought his topic had faded out, but obviously I was wrong!. Excellent! > I obscure the hash byte by XOR'ing with the key, wouldn't it make … -
Replied To a Post in How to become a Java master or advanced?
I've been programming in Java since the mid-90s (working for HP Consulting), and programming since 1969, but I'm not prepared to call myself a "master". The more I learn, the … -
Replied To a Post in A simple encryption scheme
yes, that makes sense to me. it looks like creating the digests dominates the execution speed, so using 32 bytes instead of just 1 will run about 30x faster, and … -
Replied To a Post in A simple encryption scheme
That'll teach me not to speed read. OK, let's start again. Here's an encrypted string using my Java implementation of your algorithm with SHA3-512 digest and unsigned bytes for the … -
Replied To a Post in A simple encryption scheme
Yes, I had SHA=256. My mistake. Herewith the data using SHA-512... 71, 210, 218, 188, 244, 138, 119, 150, 216 any better? -
Replied To a Post in A simple encryption scheme
I don't see the problem with bytes. Both languages generate valid SHA512 bytes, and this program just uses XOR; no artithmetic operations, so the signed/unsigned difference never comes into play. … -
Replied To a Post in A simple encryption scheme
ps why not use all the bytes in the hash before taking the hit on computing a new hash? Could make a difference if you are encoding a lot of … -
Replied To a Post in more about java programming
What are you trying to say??? -
Replied To a Post in A simple encryption scheme
That looks like fun! To see if I understood it correctly I tried a Java version. Before I publish it maybe you could validate it by decoding the following: key … -
Replied To a Post in Java heap size issue
> Thanks it works. So what did you do- edit the .bat or upgrade to 64 bit? ps: As a wise man once said as part of his DaniWeb signature: … -
Replied To a Post in Java heap size issue
Are you running a 64 bit JRE? 32 bit JREs won't support 4g of anything "JADX" - is that the android de-compiler? I'm looking at jadx.bat where I see: set … -
Replied To a Post in Java heap size issue
Is it in the .bat file? -
Gave Reputation to toto_4 in convert python to java
defFlip(b): return [[b[(N-1)-i][j]for j in range(N)]for i in range(N)] defRot90(b): return[[b[N-1)-j][i]for j in range(N)]for i in range(N)] defRot180(b): return Rot90(Rot90(b)) defRot270(b): return Rot180(Rot90(b)) defFlipRot90(b): return Flip(Rot90(b)) defFlipRot180(b): return Flip(Rot180(b)) defFlipRot270(b): … -
Replied To a Post in convert python to java
There's nothing quite like repeating the same mistake... You hijack a 15 year old thread to post uncommented UNINDENTED Python? And you expect us to do what? -
Replied To a Post in convert python to java
You hijack a 15 year old thread to post uncommented UNINDENTED Python? And you expect us to do what? -
Replied To a Post in getting the last modified date of file in java
Sorry - I don't have an Adroid SDK to test on. The Date class was superceeded by the NIO Path/Files classes years ago. Maybe try the NIO equivalent? ... System.out.println(Files.getLastModifiedTime(f.toPath())); -
Replied To a Post in getting the last modified date of file in java
I can't see anything wrong with that code. I pasted it into a little stand-alone test and it works perfectly... JFileChooser fileChooser = new JFileChooser(); int result = fileChooser.showOpenDialog(null); File … -
Replied To a Post in How to convert this piece of java code to equivalent php code?
> Java/ Javascript is usually client side There's no such thing as "Java/ Javascript" javascript is client side. Java (not the same thing) is used for both, but the majority … -
Replied To a Post in Error when running program
> 9999999999 That's 10 digits, not 7 and as such can hold values > 2^31 which cannot be stored in an int. (Although I have no idea if that is … -
Replied To a Post in Grading system
Do you have a question relating to that code? -
Replied To a Post in Exception handling in java (Looping in menu)
Maybe the problem is that `choice` is still zero after a failed `nextInt()`, thus exiting the loop. Try setting `choice` to some other vaue (eg -99) in the `catch`. -
Replied To a Post in What is the counterpart of this C pointer programme in C#?
This is presumably all about passing params as references rather than values (the default in C#) To pass a parameter as a reference use the `ref` keyword. See https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/passing-parameters -
Replied To a Post in Casting an ArrayList?
I think that sos's point was that you shouldn't have to perform that kind of cast. It probably results from a bad design decision. The "correct" solution is to declare … -
Replied To a Post in Removing Duplicates - Java
`HashSet<Object>` or. `HashSet<>`. or just `HashSet` will allow any kind of object. Primitives will be automatically wrapped with the appropriate class. -
Replied To a Post in Removing Duplicates - Java
Yes, one of the easiest ways to detect duplicates is to use a Collection that does not allow duplicates, eg HashSet. Its `add` method returns false if the set already … -
Replied To a Post in convert to java
... and your question is? -
Replied To a Post in java indexOf question
> Hint: Count the steps while traversing the list until encountering position p > isnt it put the method Iterable positions();? Yes. Simply use positions() to loop through the elements … -
Replied To a Post in Buttons don't work or even appear in my Java GUI in JGRASP
Where do you add the JPanels to the JFrame???? -
Replied To a Post in Apache Derby Database Cloud
JavaDB is just Derby, which moved from Oracle to Apache where it is still very much alive. The most recent release was March 1st 2021 (!) https://db.apache.org/derby/ -
Gave Reputation to Reverend Jim in #1 What Is The Best Way To Learn Java?
If you already know how to program well in another language then learning to program in java should be "easier". However, learning any new skill takes time and effort in … -
Replied To a Post in #1 What Is The Best Way To Learn Java?
Recognise that best AND easy doesn't exist. Oracle's own tutorials are (IMHO) the best - start [here](https://docs.oracle.com/javase/tutorial/getStarted/index.html) As for easy - there are loads of beginner tutorials on the web … -
Replied To a Post in I am having trouble understanding why my program is giving me an error?
Your while test is wrong... while grades<= zero AND >= zero. Grades can't be both those at the same time (unless it is == 0), so the test is false … -
Replied To a Post in New to Java and would appreciate the help.
You should explain EXACTLY what "does not work properly" means... eg what error message do you get, or how does the output differ from what you expected. Anyway - for … -
Replied To a Post in can anyone help with this code
... and what is your question? -
Replied To a Post in Desktop_Application
All you NEED is the Java Development Kit (JDK) and a text editor (any text editor). IDEs like Eclipse and NetBeans are used by real programmers because they provide all … -
Replied To a Post in can anyone help with this code
Hint: `for (Account acc : gBank) {...` this loops through all the accounts, setting `acc` to refer to each account in turn so in the loop you can use `acc` …
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