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Programming & Software Q&A | CollectiveSolver
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Welcome to collectivesolver - Programming & Software Q&A with code examples. A website with trusted programming answers. All programs are tested and work.
Contact: aviboots(AT)netvision.net.il
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Recent questions tagged JAVA
43,161
questions
56,039
answers
573
users
Recent questions tagged JAVA
1
answer
9
views
How to select N unique random values that appear exactly once in an existing list with Java
asked
2 days
ago
by
avibootz
java
java-n-unique-random-values-appear-once-in-list
n-unique-random-values-appear-once-in-list
1
answer
14
views
How to select N unique random indices from an existing array in Java
asked
3 days
ago
by
avibootz
java
java-select-n-unique-random-indices-array
select-n-unique-random-indices-array
1
answer
18
views
How to compute the factorial of a number greater than 20 in Java
asked
3 days
ago
by
avibootz
java
java-compute-factorial-of-number-greater-20
compute-factorial-of-number-greater-20
1
answer
26
views
How to find common words in two strings with Java
asked
4 days
ago
by
avibootz
java
java-string
java-find-common-words-two-strings
find-common-words-two-strings
1
answer
26
views
How to generate all trigrams (3-character sequences) from a given word in Java
asked
6 days
ago
by
avibootz
java
java-generate-all-trigrams-given-word
generate-all-trigrams-given-word
1
answer
37
views
How to compare two float arrays for exact equality in Java
asked
6 days
ago
by
avibootz
java
java-compare-two-float-arrays-exact-equality
compare-two-float-arrays-exact-equality
1
answer
43
views
How to compare two float arrays using a tolerance in Java
asked
Sep 8
by
avibootz
java
java-compare-two-float-arrays-tolerance
compare-two-float-arrays-tolerance
2
answers
61
views
How to split text without spaces into a list of words using dictionary-based segmentation in Java
asked
Sep 6
by
avibootz
java
java-split-text-without-spaces-into-words-dictionary
split-text-without-spaces-into-words-dictionary
1
answer
40
views
How to convert numbers from 0 to 999,999,999,999,999 (up to 999 trillion) into English words in Java
asked
Sep 5
by
avibootz
java
java-convert-numbers-0-999999999999999-english-words
convert-numbers-0-999999999999999-english-words
1
answer
41
views
How to parse a table into a binary tree in Java
asked
Sep 4
by
avibootz
java
java-parse-table-into-binary-tree
parse-table-into-binary-tree
1
answer
41
views
How to implement a queue using two stacks in Java
asked
Sep 4
by
avibootz
java
java-implement-queue-two-stacks
implement-queue-two-stacks
1
answer
45
views
How to declare, initialize, and print a medium complexity, varied, feature‑rich data structure in Java
asked
Sep 2
by
avibootz
java
-declare-initialize-print-medium-complexity-data-structure
declare-initialize-print-medium-complexity-data-structure
1
answer
52
views
How to sort a list of classes that contain nested classes using custom comparison logic in Java
asked
Sep 1
by
avibootz
java
java-sort-list-of-classes-contain-nested-classes
sort-list-of-classes-contain-nested-classes
1
answer
50
views
How to sort a list of records that contain nested records using custom comparison logic in Java
asked
Sep 1
by
avibootz
java
java-sort-list-of-records-contain-nested-records
sort-list-of-records-contain-nested-records
1
answer
49
views
How to find the N most frequent non‑stopwords in a text in Java
asked
Aug 30
by
avibootz
java
java-n-most-frequent-non-stopwords-text
n-most-frequent-non-stopwords-text
1
answer
52
views
How to find the starting index of all occurrences of a word in a string in Java
asked
Aug 30
by
avibootz
java
java-find-starting-index-all-occurrences-word-string
find-starting-index-all-occurrences-word-string
1
answer
49
views
How to convert any digital storage unit into all others (B, KB, MB, GB, TB, PB, EB, ZB, YB) in Java
asked
Aug 27
by
avibootz
java
java-convert-any-digital-storage-unit-into-all-others
convert-any-digital-storage-unit-into-all-others
1
answer
46
views
How to write the 7 Boom game. If a number is divided by 7 or includes the digit 7, the user writes Boom in Java
asked
Aug 26
by
avibootz
java
java-7-boom-game
7-boom-game
1
answer
47
views
How to write the Tic-Tac-Toe game in Java
asked
Aug 26
by
avibootz
java
java-tic-tac-toe-game
tic-tac-toe-game
1
answer
52
views
How to initialize different types of arrays to zero in Java
asked
Aug 26
by
avibootz
java
java-initialize-array
java-initialize-different-types-of-arrays-to-zero
initialize-different-types-of-arrays-to-zero
1
answer
58
views
How to generate a random RGBA color and opacity in Java
asked
Aug 25
by
avibootz
java
java-generate-random-rgba-color-opacity
generate-random-rgba-color-opacity
1
answer
58
views
How to generate a series of unique HEX colors in Java
asked
Aug 23
by
avibootz
java
java-generate-series-unique-hex-colors
generate-series-unique-hex-colors
2
answers
62
views
How to print the numbers 0 to 31 by changing 1 bit each time in Java
asked
Aug 21
by
avibootz
java
java-print-0-31-changing-1-bit-each-time
print-0-31-changing-1-bit-each-time
1
answer
62
views
How to find the first and last 20‑digit prime numbers in Java
asked
Aug 21
by
avibootz
java
java-first-last-20-digit-prime-numbers
first-last-20-digit-prime-numbers
1
answer
66
views
How to find the first and last 10‑digit prime numbers in Java
asked
Aug 21
by
avibootz
java
java-first-last-10-digit-prime-numbers
first-last-10-digit-prime-numbers
1
answer
57
views
How to find the next number in the series 1, 8, 27, 64, 125, 216 using Java
asked
Aug 20
by
avibootz
java
java-find-next-number-in-series-1-8-27-64-125-216
find-next-number-in-series-1-8-27-64-125-216
1
answer
63
views
How to generate N random 1s in a zero-based matrix with Java
asked
Aug 20
by
avibootz
java
java-generate-n-random-1-zero-based-matrix
generate-n-random-1-zero-based-matrix
1
answer
81
views
How to initialize a list with a range of numbers in Java
asked
Aug 17
by
avibootz
java
java-initialize-list-range-of-numbers
initialize-list-range-of-numbers
1
answer
67
views
How to initialize an array with a range of numbers in Java
asked
Aug 17
by
avibootz
java
java-initialize-array-range-of-numbers
initialize-array-range-of-numbers
1
answer
82
views
How to do modulo multiplication for 64‑bit values without using BigInteger in Java
asked
Aug 16
by
avibootz
java
java-modulo-multiplication-64-bit-values-without-biginteger
modulo-multiplication-64-bit-values-without-biginteger
1
answer
96
views
How to remove every N‑th element from a list in Java
asked
Aug 15
by
avibootz
java
java-remove-every-n-element-list
remove-every-n-element-list
2
answers
106
views
How to build sparse array in Java
asked
Aug 14
by
avibootz
java
java-build-sparse-array
build-sparse-array
1
answer
97
views
How to check if a given array is a sparse array in Java
asked
Aug 14
by
avibootz
java
java-check-sparse-array
check-sparse-array
1
answer
95
views
How to get the first N digits of a BigInteger in Java
asked
Aug 13
by
avibootz
java
java-get-first-n-digits-biginteger
get-first-n-digits-biginteger
1
answer
98
views
How to extract and sort numbers from a string containing numbers and text in Java
asked
Aug 12
by
avibootz
java
java-extract-sort-numbers-string
extract-sort-numbers-string
1
answer
85
views
How to convert radians to degrees and degrees to radians in Java
asked
Aug 11
by
avibootz
java
java-convert-radians-degrees-degrees-radians
convert-radians-degrees-degrees-radians
2
answers
108
views
How to find the N smallest values in a 2D array in Java
asked
Aug 9
by
avibootz
java
java-find-n-smallest-values-2d-array
find-n-smallest-values-2d-array
1
answer
86
views
How to sort an array with a single loop in Java
asked
Aug 8
by
avibootz
java
java-sort-array-with-single-loop
sort-array-with-single-loop
1
answer
86
views
How to remove extra whitespace from a string in Java
asked
Aug 7
by
avibootz
java
java-remove-extra-whitespace-string
remove-extra-whitespace-string
1
answer
90
views
How to calculate the distance between two latitude-longitude points in Java
asked
Aug 7
by
avibootz
java
java-distance-between-two-latitude-longitude-points
distance-between-two-latitude-longitude-points
1
answer
98
views
How to convert a decimal to a long in Java
asked
Aug 6
by
avibootz
java
java-convert-decimal-to-long
convert-decimal-to-long
1
answer
88
views
How to generate a random 4×4 binary magic square (using only 0 and 1) in Java
asked
Aug 6
by
avibootz
java
java-generate-random-4-4-binary-magic-square-only-0-1
generate-random-4-4-binary-magic-square-only-0-1
1
answer
100
views
How to remove duplicate words with Unicode characters from free‑text in Java
asked
Aug 3
by
avibootz
java
java-remove-duplicate-words-unicode-free-text
remove-duplicate-words-unicode-free-text
1
answer
96
views
How to remove duplicate words from free‑text in Java
asked
Aug 2
by
avibootz
java
java-remove-duplicate-words-from-free-text
remove-duplicate-words-from-free-text
1
answer
90
views
How to remove duplicate case‑insensitive words separated by multiple delimiters from a string in Java
asked
Aug 1
by
avibootz
java
java-remove-duplicate-case-insensitive-words-multiple-delimiters-from-string
remove-duplicate-case-insensitive-words-multiple-delimiters-from-string
1
answer
82
views
How to perform high‑performance reversible text compression using a word dictionary in Java
asked
Jul 31
by
avibootz
java
java-text-compression-using-word-dictionary
text-compression-using-word-dictionary
1
answer
98
views
How to traverse an array from both sides at the same time in Java
asked
Jul 30
by
avibootz
java
java-traverse-array-both-sides-same-time
traverse-array-both-sides-same-time
1
answer
88
views
How to generate random Powerball lottery numbers (pick 5 numbers from 1-69 + 1 Powerball from 1-26) in Java
asked
Jul 29
by
avibootz
java
java-generate-random-powerball-lottery-numbers-5-of-1-69-and-1-of-1-26
generate-random-powerball-lottery-numbers-5-of-1-69-and-1-of-1-26
1
answer
93
views
How to compute the total number of Powerball lottery combinations (5 out of 99 and 1 out of 26) in Java
asked
Jul 29
by
avibootz
java
java-compute-total-number-powerball-lottery-combinations-5-99-and-1-26
compute-total-number-powerball-lottery-combinations-5-99-and-1-26
1
answer
85
views
How to generate random lottery numbers for 6 numbers out of 37 and 1 power number out of 7 in Java
asked
Jul 28
by
avibootz
java
java-generate-random-lottery-numbers-for-6-out-of-37-power-1-out-of-7
generate-random-lottery-numbers-for-6-out-of-37-power-1-out-of-7
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