All Questions
636 questions
3
votes
2
answers
300
views
A View over java.lang.String - improved take II
(This post elaborates on A string view over a Java String.)
This time, I have incorporated both the great answers in the previous iteration:
https://codereview.stackexchange.com/a/293506/58360 by ...
- 29.8k
5
votes
2
answers
544
views
A View over java.lang.String
(This post has continuation at A string view over a Java String - improved take II.)
This time, I have a simple string view class for faster operation on substrings in actual string objects:
...
- 29.8k
3
votes
1
answer
176
views
Snail matrix in Java - version III (generalizing)
Once again, in the previous version,
Alexander Ivanchenko helped me with his awesome answer.
Now, I have improved the toString() and, also, generalized the class ...
- 29.8k
4
votes
2
answers
124
views
(Another) text formatting method with word wrapping in Java
Please take a look at my code for (simply) formatting/wrapping a text. Is there something to improve?
Here are the properties the method should have: (updated)
Every space character (i.e. ...
- 628
3
votes
3
answers
156
views
Redouble each occurrence of char recursively, and add n
In following of this question, I would like to have a second review.
The exercise is to write a recursive method that takes a String and a ...
- 628
4
votes
1
answer
272
views
Print columns of text without hard coding the width (attempt 2)
If you'd like to print this:
One Two Three Four
1 2 3 4
using this:
...
- 840
3
votes
1
answer
121
views
Print columns of text without hard coding the width
If you'd like to print this:
One Two Three Four
1 2 3 4
using this:
...
- 840
-2
votes
1
answer
401
views
Number Plate Generation Program
I wrote a number plate generation program. The program generates number plates for a car registered with a specific Memory Tag and on a specific date.
Number plates use the following format: (2 letter ...
- 21
1
vote
3
answers
82
views
FileIO lines to String Converter
I think I made a good FileIO object because I can simply copy-paste whenever I need, however I wonder How I can improve my code.
This code takes file path of the target file and turns every line to ...
- 13
2
votes
1
answer
180
views
An evolutionary algorithm written in Java to crack an XOR cipher
Alright. So TryHackme is a website that tries to teach hacking with hands on labs. They have a room called JVM Reverse Engineering where the user gets to reverse engineer Java apps, and in particular ...
- 173
4
votes
2
answers
1k
views
Add a number to a file name if does not exist or increase the number if it exist
I'm currently working on a solution to add a number to a file name if the number does not exist or increase de number by one if the number exist.
For instance if you input "filename.jpeg" ...
- 41
4
votes
6
answers
1k
views
Reverse string with identical spaces as in original String using Java
This is interview question
Reverse string with identical spaces as in original String using Java
For example
Original String :
best in the world and is greatest and is making sure the world goes
well
...
3
votes
5
answers
561
views
Frame Strings that contain newlines
I have an application where I need to highlight some information that is printed to the console, so I wrote some static library methods which do that. I tested for bugs. Is my code clean and ...
- 2,174
2
votes
1
answer
129
views
Related to DSA: Find longest common prefix
The objective of below code is find longest common prefix from trie DataStructure which is written in Java.
Code:
...
- 23
7
votes
2
answers
695
views
Concat two strings by slicing them with same length
I want to concat two strings, by sub-stringing each one with same length, and concatenation should happen like I mentioned below
for suppose,
I have str1 = raines, str2 = bowls, and LENGTH as 2, then ...
- 71
0
votes
2
answers
149
views
New String similarity algorithm (java)
Recently I have been developing a library for Java which provides utility functions for arrays, strings, etc.. While researching string similarity algorithms, I managed to write one of my own. I am ...
- 49
-2
votes
2
answers
407
views
Fastest string search algorithm invented by me. It is called ""Choudhary String Search Algorithm""
I have invented the fastest string search algorithm. It is called ""Choudhary String Search Algorithm (choudharyStringSearchAlgorithm)"". I have compared my algorithm with Brute ...
user245050
1
vote
1
answer
214
views
Finding longest palindromic substring in a string (gives TLE on leetcode)
I'm solving the Longest Palindromic Substring problem on LeetCode.
And here's my final submission:
...
- 113
0
votes
1
answer
542
views
Better way to format a query string in Java
description
I'm using influxDB, I need use Java to generate a query command.
The TestingTag struct maybe missing 0-3 fields.
code:
...
- 300
1
vote
2
answers
227
views
Parsing words from string
I am learning Java, so I am beginner. I know I can do this with split function but I want to improve my algorithm knowledge.
I will be glad if you help me. Thanks.
inputStr variable is contains the ...
- 23
7
votes
1
answer
339
views
Create tweet threads from String in Java
I recently got this question in an exam, this is how I implemented, it is working fine. However, I would like to know if the code can be improved, as I think it for sure needs to be improved. The ...
- 73
4
votes
1
answer
327
views
A different approach to string pattern matching algorithm
Although there exists the most efficient "Knuth-Morris-Pratt" algorithm of string pattern matching. I tried to achieve the same result with a different approach. But I am not sure about it's ...
- 143
0
votes
1
answer
914
views
Fastest string search algorithm
I have invented the fastest string search algorithm. Can someone prove that it is not fastest?
I am not considering worst case scenarios.
The algorithm can be found here: https://sourceforge.net/...
anon
0
votes
1
answer
96
views
Rabin karp substring search
Below is the Rabin Karp implementation. I am not so sure about it, and there is no where that I can check whether this code really works or not. It will most helpful for extra set of eyes if whether ...
2
votes
2
answers
856
views
Counting uppercase and lowercase characters in a string
I created two programs (one with JAVA8) to calculate the total count of uppercase and lowercase characters in given String. After checking the execution time JAVA8 is taking longer execution time than ...
- 21
4
votes
8
answers
1k
views
Are two strings anagrams?
My code passes all the given test cases.
I would like to know a better way to to write the code.
Such as a more efficient algorithm for checking if two strings are anagrams.
...
- 151
3
votes
3
answers
942
views
Longest common prefix for set of strings
Question:
Write a function to find the longest common prefix string amongst an array of strings.
If there is no common prefix, return an empty string "".
Example :
...
- 501
4
votes
3
answers
560
views
Censoring emails in Java
I'm working on a simple method that would censor emails (GPDR stuff) so they won't show the full name of a user, with 1st character, optional dot, 1st character after the dot and whatever is left ...
- 143
1
vote
2
answers
1k
views
URLify a given String - replace spaces with %20
I have written a code to replace all spaces in a String with %20.
...
- 113
3
votes
1
answer
117
views
Substring search in Java
I am trying to make an algorithm that will find the index of a given substring (which I have labeled pattern) in a given String (...
- 361
3
votes
1
answer
77
views
A Sub-string Extractor Implementation with Given Vocabulary Words in Java
This is a follow-up question for A Sub-string Extractor Implementation with Specific Keywords in Java. As AJNeufeld's answer mentioned, the test case ...
- 5,510
4
votes
2
answers
85
views
A Sub-string Extractor Implementation with Specific Keywords in Java
I am trying to implement a Java version sub-string extractor with "start keyword" and "end keyword" and the extracted result is from (but excluded) the given start keyword to (but ...
- 5,510
1
vote
3
answers
103
views
Identifying indices of non-delimited characters in a string, supporting greater than 1 length of delimiters
The code below takes a string that potentially contains a true match for a delimiter. There can be multiple delimiters located anywhere in the string. We need to obtain the indices that are not a ...
- 11
9
votes
1
answer
1k
views
Generate unique random strings considering collisions
I'm coding a random strings generator. It's working, but I'm not sure if this is efficient.
...
- 191
8
votes
3
answers
830
views
Creating Two-Dimensional String Array for Plane Seats
I'm creating a ticket reservation system in Java, I want to use a Two-dimensional String array for managing the seats. I have enums that hold the plane model and the amount of seats available so the ...
- 125
7
votes
4
answers
3k
views
How can I efficiently manipulate digits in a string without using RegEx in Java?
I am reading a book with different quizzes about coding interviews.
Please implement a function that increments a string based on the rules below:
It should take the string of unknown length and ...
- 829
6
votes
4
answers
2k
views
First non repeated character
Problem Statement :
Print the first non repeating character in a string.
Example :
In the string somecharsjustdon'tliketorepeat, ...
- 163
2
votes
1
answer
161
views
Converting an integer to a hexadecimal string representation in Java
I have rolled my own Java method for converting ints to the hexadecimal Strings:
...
- 29.8k
6
votes
2
answers
2k
views
Hide certain email characters
Hide email characters:
When email only has one letter then just cover that letter with the * symbol e.g. *@gmail.com
When ...
- 103
2
votes
1
answer
2k
views
Add comma/and between string array in java
i get an array of authors from json response and i have to display authors name in TextView(android) in proper format like =>Viraj, Chetan and George R. R. Martin
my code work fine, but it's a mess....
- 21
4
votes
3
answers
681
views
Checking if a string contains all unique characters
I am currently reviewing CTCI(Cracking the Coding Interview)
The question is asking me to implement an algorithm which checks whether the characters in a string are all unique however they do not want ...
-3
votes
1
answer
53
views
I am trying to save a string to a MYSQL table from a radiobutton in java/Android studio [closed]
I am trying to save a radiobutton string if it clicked. I am making a survey where I need to save a "yes" or "no" into a MYSQL table using volley. I am having a little trouble ...
3
votes
3
answers
180
views
Optimize Memory Java String Array
I was trying to solve one programming challenge :
First input is a list of connections which is made of pair of IPv4
address. Each IP has its own state which starts with false, each
connection also ...
- 133
4
votes
1
answer
455
views
Hamming distance implementation in Java
I'm exploring String relativity and comparison techniques, and I found Hamming distance algorithm in my search so I give a try to implement that approach in Java and below I'm sharing my ...
- 155
1
vote
1
answer
163
views
Encasing a string in double quotes
I need to add some characters to a String before using it for an API call. The idea is to add a " char both at the beginning and at the end of the String, to make ...
- 167
3
votes
1
answer
87
views
Listing words from text, provide lines where appears, count them
I applied for Junior Java Developer in some company.
Got a task:"Listing words (without duplicates) from text, provide lines where appears, count them."
Output should looks like:
Alphacoronavirus - 3 ...
- 33
2
votes
1
answer
83
views
Code for adding a user to the database
I have a code that adds a user to the database, getting the username from the dialog.My fragment implements the interface with the onInputSend method, which is called by the dialog when the user ...
- 459
4
votes
5
answers
2k
views
Convert Integer to String without using Java API library
I have written a Java program that converts an integer to String digit by digit and concatenate them together using the + operator without touching the Stock Java API library.
I like to have feedback ...
- 297
4
votes
3
answers
852
views
Vowels and consonants in Java-exercises with strings
I feel like my code is too messy-Im looking for possible way to make it more readable/shorter.
Goals:
1)Get three strings from user input. They have to be the same length.
a)First must contain only ...
- 35
7
votes
4
answers
2k
views
Determine if a String has a mirroring head and tail
Problem statement:
Given a string, look for a mirror image (backwards) string at both the
beginning and end of the given string. In other words, zero or more
characters at the very begining of ...
- 872