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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
42,844
questions
55,671
answers
573
users
Recent questions tagged JAVA
1
answer
12
views
How to generate a series of unique HEX colors in Java
asked
1 day
ago
by
avibootz
java
java-generate-series-unique-hex-colors
generate-series-unique-hex-colors
2
answers
20
views
How to print the numbers 0 to 31 by changing 1 bit each time in Java
asked
3 days
ago
by
avibootz
java
java-print-0-31-changing-1-bit-each-time
print-0-31-changing-1-bit-each-time
1
answer
16
views
How to find the first and last 20‑digit prime numbers in Java
asked
3 days
ago
by
avibootz
java
java-first-last-20-digit-prime-numbers
first-last-20-digit-prime-numbers
1
answer
18
views
How to find the first and last 10‑digit prime numbers in Java
asked
3 days
ago
by
avibootz
java
java-first-last-10-digit-prime-numbers
first-last-10-digit-prime-numbers
1
answer
20
views
How to find the next number in the series 1, 8, 27, 64, 125, 216 using Java
asked
4 days
ago
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
21
views
How to generate N random 1s in a zero-based matrix with Java
asked
4 days
ago
by
avibootz
java
java-generate-n-random-1-zero-based-matrix
generate-n-random-1-zero-based-matrix
1
answer
44
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
34
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
52
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
54
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
64
views
How to build sparse array in Java
asked
Aug 14
by
avibootz
java
java-build-sparse-array
build-sparse-array
1
answer
65
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
79
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
72
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
63
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
86
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
62
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
62
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
65
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
68
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
65
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
75
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
71
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
64
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
64
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
80
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
72
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
76
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
66
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
1
answer
75
views
How to compute the total number of lottery combinations for choosing 6 out of 37 and 1 power out of 7 in Java
asked
Jul 27
by
avibootz
java
java-total-lottery-combinations-choosing-6-out-of-37-power-1-out-of-7
total-lottery-combinations-choosing-6-out-of-37-power-1-out-of-7
1
answer
68
views
How to find the Nth set bit in a 64‑bit integer with Java
asked
Jul 25
by
avibootz
java
java-find-n-set-bit-in-64-bit-integer
find-n-set-bit-in-64-bit-integer
1
answer
71
views
How to find the Nth set bit in a 32‑bit integer with Java
asked
Jul 24
by
avibootz
java
java-find-n-set-bit-in-32-bit-integer
find-n-set-bit-in-32-bit-integer
1
answer
79
views
How to convert a decimal number to a rational number in Java
asked
Jul 23
by
avibootz
java
java-convert-decimal-number-to-rational-number
convert-decimal-number-to-rational-number
1
answer
84
views
How to round an integer up to the nearest multiple of 'multiple' in Java
asked
Jul 22
by
avibootz
java
java-round
java-round-integer-up-nearest-multiple-of-multiple
round-integer-up-nearest-multiple-of-multiple
1
answer
80
views
How to find the minimal possible sum of two distinct elements in a list with Java
asked
Jul 21
by
avibootz
java
java-minimal-sum-two-elements-list
minimal-sum-two-elements-list
1
answer
79
views
How to split a 32‑bit integer into its four bytes in Java
asked
Jul 20
by
avibootz
java
java-split-32-bit-integer-into-four-bytes
split-32-bit-integer-into-four-bytes
1
answer
68
views
How to split a number N into M random positive parts whose sum is exactly N in Java
asked
Jul 19
by
avibootz
java
java-split-number-n-into-m-random-parts-whose-sum-is-n
split-number-n-into-m-random-parts-whose-sum-is-n
1
answer
69
views
How to determine whether two axis‑aligned rectangles overlap in Java
asked
Jul 18
by
avibootz
java
java-determine-whether-two-axis-aligned-rectangles-overlap
determine-whether-two-axis-aligned-rectangles-overlap
1
answer
90
views
How to generate 3 no-digit repeated random integers, each with distinct digits in Java
asked
Jul 17
by
avibootz
java
java-generate-3-no-digit-repeated-random-integers-each-with-distinct-digits
generate-3-no-digit-repeated-random-integers-each-with-distinct-digits
1
answer
74
views
How to generate N random integers, each with distinct digits and exact length L in Java
asked
Jul 16
by
avibootz
java
java-generate-n-random-integers-with-distinct-digits-and-length-l
generate-n-random-integers-with-distinct-digits-and-length-l
1
answer
75
views
How to sort a string in the order: lowercase letters - uppercase letters - odd digits - even digits in Java
asked
Jul 14
by
avibootz
java
java-sort-string-order-lowercase-uppercase-odd-even
sort-string-order-lowercase-uppercase-odd-even
1
answer
74
views
How to create an alphabet rangoli (geometric and character pattern) of size N in Java
asked
Jul 12
by
avibootz
java
java-create-alphabet-rangoli
create-alphabet-rangoli
2
answers
102
views
How to wrap a string into lines of width w in Java
asked
Jul 11
by
avibootz
java
java-wrap-string-into-lines-width-w
wrap-string-into-lines-width-w
1
answer
80
views
How to compute the day of the week for January 1st of any given year in Java
asked
Jul 11
by
avibootz
java
java-day-of-week-january-1st-any-given-year
day-of-week-january-1st-any-given-year
1
answer
70
views
How to get common letters that appear in every word in a list of words with Java
asked
Jul 10
by
avibootz
java
java-common-letters-every-word-list-words
common-letters-every-word-list-words
1
answer
70
views
How to check whether a word is an ABC word in Java
asked
Jul 10
by
avibootz
java
java-cpp-check-whether-word-is-abc-word
cpp-check-whether-word-is-abc-word
1
answer
73
views
How to encode and decode any string into Base‑36 in Java
asked
Jul 7
by
avibootz
java
java-encode-decode-string-base-36
encode-decode-string-base-36
1
answer
80
views
How to generate random positive integers that sum to N in Java
asked
Jul 6
by
avibootz
java
java-generate-random-integers-sum-to-n
generate-random-integers-sum-to-n
1
answer
83
views
How to perform multiple 5‑card draws from a shuffled 52‑card deck in Java
asked
Jul 5
by
avibootz
java
java-perform-multiple-5-card-draws-from-52-card-deck
perform-multiple-5-card-draws-from-52-card-deck
1
answer
78
views
How to pick 5 random cards from a 52‑card deck in Java
asked
Jul 4
by
avibootz
java
java-pick-5-random-cards-from-a-52-card-deck
pick-5-random-cards-from-a-52-card-deck
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