Questions tagged [java]
Java (not to be confused with JavaScript) is a class-based, object-oriented, strongly typed, reflective language and run-time environment (JRE). Java programs are compiled to bytecode and run in a virtual machine (JVM) enabling a "write once, run anywhere" (WORA) methodology.
10,839 questions
170votes
15answers
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Remove Last Comma
I want to join strings together, but when doing this it often happens that there is a comma too many, and therefore I need to remove that comma. In this code, I use the ...
- 1,827
99votes
6answers
67kviews
File Browser GUI
FileBro is a basic GUI based File Browser. FileBro Functionality Directory tree - shows the file system roots at start-up, but is otherwise built lazily as the user browses around the file system. ...
- 1,316
98votes
9answers
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'100' is a magic number
Magic numbers are bad... I totally agree. But there's one magic number I find hard to fix: '100' is a magic number. Consider this code: ...
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97votes
5answers
19kviews
Load fifty million integers as quickly as possible in Java
I am working my way through Project Euler. Many of the problems deal with prime number calculations: this is the type of code that can be extracted into a separate class and reused. While calculating ...
user31517
87votes
11answers
12kviews
Nesting versus GOTO: which is better to avoid?
In Java they're not really known as GOTO statements and are rather referred to as Branching Statements, but I find that the former term is a bit more indicative of ...
- 4,909
85votes
5answers
9kviews
Guessing a number, but comments concerning
I always get marked down for my comments and I just wanted to see if these comments are acceptable or what I should include/where I should include them. ...
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82votes
6answers
233kviews
Design a chess game using object-oriented principles
I would like to know if my approach is correct and how could it could be improved? Also, is there a way to get rid of the relation between the Piece and the ...
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69votes
2answers
3kviews
You are being watched! - Comments of Interest
You are being watched Code Review has an open system A machine that spies on you on every hour of every day I know because I built it. I designed the machine to detect suggestions to post on ...
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63votes
5answers
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Removing elements on a List while iterating through it
I needed a way to remove elements on a List while iterating through it. Supposedly something like this (illegal code): ...
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62votes
3answers
4kviews
Analyzing Minesweeper Probabilities
Calculating probabilities in Minesweeper might sound like an easy task, but I've seen so many probability calculators that's either incorrect, horribly slow, or with ugly code (or all of them) so I ...
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57votes
8answers
36kviews
Efficiently checking if a number is divisible by 3
I'm looking for code review, best practices and optimizations. ...
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56votes
6answers
97kviews
Is it OK to use while ((line = r.readLine()) != null) construct? [closed]
I want to refactor the following code because I don't feel comfortable about using assignment inside comparison operator. It looks like pretty idiomatic C, but do you think this is a good practice in ...
- 1,144
53votes
12answers
23kviews
Searching in an array in less than O(n) time
I have an array where each element is either one less or one greater than the preceding element \$\{x_i = x_{i-1} \pm 1\}\$. I wish to find an element in it in less than \$O(n)\$ time. I've ...
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49votes
3answers
11kviews
Sorting millions of integers
Last Friday I was hit with a sorting interview question that I never really had to deal with. Develop a your own sorting algorithm. It cannot use any other Classes for help. It needs to ...
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49votes
5answers
15kviews
Thread-Safe and Lock-Free - Queue Implementation
I was trying to create a lock-free queue implementation in Java, mainly for personal learning. The queue should be a general one, allowing any number of readers and/or writers concurrently. Would you ...
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