Tagged Questions
2
votes
1answer
10 views
More efficient way to draw bufferedimage into another
Okay, for what I'm doing, I need to be able to draw a buffered image directly into a larger buffered image. I've searched around a little and still have failed to find a better way, but my current way ...
7
votes
1answer
70 views
Perfect game loop
I've been working on development for an Android game, and this is the game loop I have so far:
...
2
votes
2answers
52 views
List of search results using Selenium
I have written the following code for looping through WebElements in Selenium.
Can someone please provide me with feedback on how to improve my code?
...
3
votes
2answers
54 views
Java Cross with characters
I managed to make a perfectly even cross with for loops.
I'm trying to make this cross easier to code. I have to keep it with ...
10
votes
6answers
1k views
Find the maximum number of consecutive zeros in an array
Question: To find the maximum number of consecutive zeros in a given
array.
Example:
Input: \${1, 2, 0, 0, 2, 4, 0, 2, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 7, 0}\$
Output: "Maximum number ...
9
votes
3answers
311 views
Optimizing “Herd Sums” problem using dynamic programming
I'm trying to solve a practice problem and all is well except for the last 2 inputs my solution is too slow. Just one loop is slowing it down I think.
Herd Sums
Execution Time Limit: 2 ...
4
votes
1answer
42 views
10
votes
2answers
333 views
Using a Pythonesque range() generator function with the Java foreach loop
Now that we have the nice new foreach loop in Java, the old-style loop looks ugly be comparison.
I like the way Python has a ...
2
votes
2answers
132 views
A matrix with square diagonals and transpose being increments of other
Construct a matrix with the following property:
North-west to South East diagonals are squares.
Matrix[i][j] + 1 = Matrix[j][i] for each i less than j.
Example of such m a matrix is ...
26
votes
5answers
4k views
Is it OK to use while ((line = r.readLine()) != null) construct?
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 ...
8
votes
2answers
404 views
Object Creation during loops
I'm trying to parse a CSV file into objects. I've already got a very efficient CSV parser (SuperCSV). The problem arises when trying to create the object with the data that is being read out.
I've ...
5
votes
1answer
126 views
5
votes
1answer
71 views
Read line and combine duplicate entries based on one of the fields
The following Java code reads lines from an input text file and will output the entry that has the highest number in field-2 to an output file:
INPUT:
William J. Clinton 6 Q1124
42nd President ...
5
votes
2answers
387 views
10
votes
2answers
173 views
Thread-safe prime number source
I am working on some multi-threaded code that requires a prime-number source.
The following code keeps an array of primes in memory, extending it as needed. It works in the 'int' domain, being ...
6
votes
1answer
299 views
How to fill an ArrayList of ArrayLists with a Left Join?
I have a class Employee that contains an ArrayList of Projects.
I'm storing the Employees in one table, and the Projects in another.
I'm trying to find the best way to create an ArrayList of ...
6
votes
2answers
4k views
Read an input text file and store the tokens in 2 different arrays
I am very new to Java so please ignore if there are obvious mistakes. If my question seems redundant then please guide me towards the correct link. However, I have surfed enough in order to find the ...
7
votes
1answer
376 views
Creating a thread for file transfer
I am creating an application in Java that runs at scheduled intervals and it transfer files from one server to another server.
For SFTP I'm using ...
10
votes
5answers
2k views
Printing star greater symbol in Java
I need to print this in Java. I have written code for this, but I feel that my code is too big.
*
**
***
****
***
**
*
My Code:
...
21
votes
5answers
2k views
Print an ASCII diamond
This takes a width specified by user and prints a diamond of that width. It uses only three for loops, but could I reduce that further? Is there a more elegant ...
42
votes
11answers
9k views
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 ...
19
votes
6answers
5k views
Guessing a unique 4 random digits number
I've created a simple game, in which the user needs to guess 4 digits number between 0-9, generated randomly using Random() Each of the 4 digits are different from ...
11
votes
3answers
859 views
Creating all possible combinations of points
I want to create all possible combinations of points (0,0),(0,1)...(12345,6789) and then all segments from these points.
The code I have written is simple and with no optimization. Is there any ...
3
votes
3answers
1k views
Decrease CPU usage in while loop
I've a application which runs with two threads. The main thread runs in one infinity-while-loop:
...
5
votes
1answer
106 views
Optimising Funny Marbles
Problem statement is at http://www.codechef.com/DEC13/problems/MARBLEGF
Lira is given array A, which contains elements between 1000 and 2000.
Three types of queries can be performed on this ...
31
votes
10answers
2k views
Perform instruction in loop every time except the last time?
The specific issue is this: I am writing to a file and want to output a new line after each line written. If I use a normal loop without any further checks, this will create a blank line at the very ...
7
votes
4answers
190 views
Looping Strategy: Change behaviour after first iteration
I have often encountered the following situation. I want to call a method in a Loop, but want to skip the call at the first run. It do not have to be a method, it also can be some lines of code that I ...
19
votes
6answers
1k views
How can I make this mess of Java for-loops faster?
I'm trying to find all the 3, 4, 5, and 6 letter words given 6 letters. I am finding them by comparing every combination of the 6 letters to an ArrayList of words ...
-2
votes
1answer
94 views
How would I improve this class in terms of responsiveness and performance?
I'm about to release this application as a hobby and I'm wondering how would I improve the speed of the calculations and overall responsiveness of the class?
I have covered a module briefly in data ...
2
votes
1answer
275 views
how to test if for loop executed all iterations successfully
This method finds the smallest positive number that is evenly divisible by all of the numbers from 1 to 20. But I am wondering if there is a better way to test if all iterations of a for loop ...
1
vote
2answers
1k views
Calculating a total price by using switch statement and sentinel controlled loop
My homework is to make a program that calculates the total value of products sold. It works, but I use the if statement because it was asking for the quantity on ...
3
votes
2answers
1k views
Differences between using a do-while vs. while and initializing variables
When I use a do-while loop, I can create a variable userInput, but don't need to initialize it until the ...
5
votes
1answer
1k views
Reducing cyclomatic complexity
I ran a sonar analysis on my code and it told me the cyclomatic complexity is too high (sonar's limit is ten branches).
Here is my code:
...
3
votes
4answers
810 views
Detecting Tic-Tac-Toe win: Enumerate all possibilities or use nested loops?
Currently I have a game that does this and then checks for victory conditions in victoryTable
...
4
votes
2answers
339 views
Optimizing if-statement with for-loop
I have been staring at this code for awhile now and I am thinking there is a way to optimize it (namely the if-else statement with the for-loops). Any advice would be greatly appreciated.
...
0
votes
2answers
856 views
Detect if linked list contains a loop
The following is a code to detect a loop in a linked list. This question is prepared strictly for interview purposes. This code has been modeled as per Linkedlist.java
How should I decide if a ...
4
votes
3answers
310 views
Does this loop unrolling make sense?
I am coding a Hanning filter which is a recursive relation:
y[i] = 0.25*(x[i] + 2*x[i-1] + x[i-2])
And here is my code were I attempt to unroll 3 times:
...
3
votes
2answers
184 views
Setting color of specific keywords in a textview
I'm developing an Android app to view C-programs. I wanted to give a simple color scheme to the text which is stored in database, retrieved as a string and then passed on to the textview.
The code I ...
2
votes
2answers
144 views
2
votes
2answers
197 views
-1
votes
3answers
422 views
dead code and infinite loops with java for loop [closed]
I have a for loop that loops infinity when i don't breakout of it and only loops once when i do break out of it. I'm sure im missing something simple.
The if and else should be identical aside from ...
1
vote
1answer
115 views
3
votes
2answers
150 views
1
vote
2answers
193 views
Setting a OnClickListener in a loop
I am trying to set a OnClickListener to a image in a loop. If the params platform is "android" then use market app, instead of default browswer. Is there a better ...
3
votes
1answer
52 views
Code to find the proper index comparing 3 values for max one
I have an algorithm and the idea is to move over an array choosing as index the index of the neighboring cell that has the max value.
I.e.
if array[i + 1][j + 1] has the largest value among the 3 ...
1
vote
2answers
238 views
How to Format Clean Accumulation Code?
I often find myself writing methods in languages such as Java or C++ that are only meant to loop over an array or something similar, accumulate the values, and then return the total. The problem is, ...
5
votes
1answer
900 views
Efficient looping procedure to find the longest common substring
I retrieved 200 tweets using jersey API. I want to find two tweets which have the longest common substring. This is what I have ...
2
votes
1answer
143 views
Rewriting nested for loops to give better formatted output
The following is code from a university practical I am doing. It reads in a txt file of twenty clients, whose information is stored in the txt file like this:
...
7
votes
7answers
1k views
Looping over a list, checking a boolean and return value
There are a number of different ways to do this, what do people prefer and why?
...
2
votes
2answers
80 views
Request for help to tidy up code involving arrays and loops
I posted the following code on here a few days ago:
...
