2,130 questions
-1 votes
1 answer
98 views
How to Replace with StringBuilder from the right
I need to replace character sequences in a string, but they are not guaranteed not to be overlapping. The rule in case of conflicts is that ( first, the longest character sequence wins, but this is ...
0 votes
0 answers
70 views
Does string interpolation StringBuilder internally? [duplicate]
Note: this is not a duplicate of the question here. That one asks about string concatenation, which is different from string interpolation. Consider this example of string creation in C#: var str = $&...
4 votes
4 answers
265 views
Swap the first and the last words and reverse all the middle characters
Description Guru gave a task to his students. He gave a sentence, and the students have to swap the first and the last words and reverse all the characters between those words. Help the students ...
0 votes
0 answers
38 views
What object should I store many strings in? [duplicate]
I have a process where I must (de)tokenize payment account information. Currently, when sending a file to client with payment information (among other things), the actual payment account numbers are ...
-1 votes
3 answers
149 views
Joining Strings into final String when the items are in StringBuilder
I have read about the StringBuilder API and StringJoiner API and String.join but not sure if I have items in StringBuilder instance, which call to use to do a join with a delimiter of choice. I do not ...
0 votes
0 answers
88 views
What Culture to use with StringBuilder to preserve functionality & performance, and avoid error CA1305
What Culture should I use with StringBuilder.Append to have similar functionality to this code: StringBuilder sb = string.empty; string str = ...; sb.Append($"{str}BLABLA\n"); Is it really ...
2 votes
1 answer
143 views
How can I build a string that can pass null check but will throw null pointer exception when call str.length?
I met a quite strange case in a program with jdk1.8, that I got a null pointer exception in String.length (which is in StringBuilder.append()) method, the exact position of the null pointer exception ...
-1 votes
1 answer
103 views
Issue related to StringBuilder in Java
The Main Issue: Can anyone please explain me why is this IDE is saying to create a constructor for using nextLine() function? package Practice.String_9; import java.util.*; public class ...
0 votes
1 answer
90 views
how the append method of StringBuilder in Java works, and why the string passed to it as a parameter doesn't create a new string object in memory
StringBuilder sb = new StringBuilder("mainWord"); sb.append("secondWord" + "thirdWord"); System.out.println(sb); The append method here accepts a String as a parameter. ...
0 votes
2 answers
960 views
How to decode extracted text from pdf file in android kotlin? [duplicate]
I'm new to Kotlin. I am creating an application in which, after the user selects/picks a PDF file, he will see fragments of the extracted text. Unfortunately each time I read text from the PDF file it ...
0 votes
1 answer
67 views
Tried to make a program that reconstructs numbers in string from a jumble string but got index out of bound error
Reconstruct Original Digits from English Given a string s containing an out-of-order English representation of digits 0-9, return the digits in ascending order. I tried the code in Java but it ...
2 votes
1 answer
207 views
Unexpected Chinese Characters in StringBuilder Char array
This is more of a curiosity question. All our software & hardware on the network are UK based. I'm using the StringBuilder.AppendLine() method to build some basic CSV data for a download on a web ...
-1 votes
1 answer
388 views
StringBuilderPool Performance Benchmark Issue
In order to gain performance on the StringBuilder operations, I tried to apply the object pooling. But pooling the StringBuilder seems to be slower than the original usage on both net8 and net7. What ...
0 votes
0 answers
50 views
I am having problems with <script> tag not working when it is clearly there in the html body in the browser console [duplicate]
I have a jsp file which has an "iframe" tag where my data is shown when user searches for a field. When user clicks search, my servlet gets userdata from the database and create html page ...
1 vote
2 answers
79 views
Issue converting stringBuilder + forloop to stream + map
What I am trying to achieve: I would like to convert a StringBuilder + forloop, like this: public String question(List<MyPojo> myPojos) { final StringBuilder stringBuilder = new ...