How to optimize a method written in Java using any of the Algorithm or Data Structure technique? [duplicate]
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Given a set of rectangles, do any overlap?
3 answers
find overlapping rectangles algorithm
12 answers
I have a list of rectangles sorted by priority.
While we iterate this List, I will insert a rectangle element into a Set. This set includes discrete rectangles. It means that all rectangles in Set should not overlap each other.
The below code has O(n^2) time complexity. But there seems to be a better way.
public Collection<Box> removeOverlapping(Collection<Box> boxList) {
Collection<Box> boxListRemovedOverlapping = new LinkedList<>();
for (Box box : boxList) {
boolean overlapping = false;
for (Box compBox : boxListRemovedOverlapping) {
if (isBoxOverlapped(box, compBox)) {
overlapping = true;
break;
}
}
if (!overlapping) {
boxListRemovedOverlapping.add(box);
}
}
return boxListRemovedOverlapping;
}
java algorithm data-structures collections
edited Nov 13 at 6:46
Abhinav
296111
asked Nov 13 at 5:24
Bongousse
214
marked as duplicate by Andreas java
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Nov 13 at 5:30
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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up vote
-1
down vote
favorite
This question already has an answer here:
Given a set of rectangles, do any overlap?
3 answers
find overlapping rectangles algorithm
12 answers
I have a list of rectangles sorted by priority.
While we iterate this List, I will insert a rectangle element into a Set. This set includes discrete rectangles. It means that all rectangles in Set should not overlap each other.
The below code has O(n^2) time complexity. But there seems to be a better way.
public Collection<Box> removeOverlapping(Collection<Box> boxList) {
Collection<Box> boxListRemovedOverlapping = new LinkedList<>();
for (Box box : boxList) {
boolean overlapping = false;
for (Box compBox : boxListRemovedOverlapping) {
if (isBoxOverlapped(box, compBox)) {
overlapping = true;
break;
}
}
if (!overlapping) {
boxListRemovedOverlapping.add(box);
}
}
return boxListRemovedOverlapping;
}
java algorithm data-structures collections
edited Nov 13 at 6:46
Abhinav
296111
asked Nov 13 at 5:24
Bongousse
214
marked as duplicate by Andreas java
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Nov 13 at 5:30
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33
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up vote
-1
down vote
favorite
up vote
-1
down vote
favorite
This question already has an answer here:
Given a set of rectangles, do any overlap?
3 answers
find overlapping rectangles algorithm
12 answers
I have a list of rectangles sorted by priority.
While we iterate this List, I will insert a rectangle element into a Set. This set includes discrete rectangles. It means that all rectangles in Set should not overlap each other.
The below code has O(n^2) time complexity. But there seems to be a better way.
public Collection<Box> removeOverlapping(Collection<Box> boxList) {
Collection<Box> boxListRemovedOverlapping = new LinkedList<>();
for (Box box : boxList) {
boolean overlapping = false;
for (Box compBox : boxListRemovedOverlapping) {
if (isBoxOverlapped(box, compBox)) {
overlapping = true;
break;
}
}
if (!overlapping) {
boxListRemovedOverlapping.add(box);
}
}
return boxListRemovedOverlapping;
}
java algorithm data-structures collections
edited Nov 13 at 6:46
Abhinav
296111
asked Nov 13 at 5:24
Bongousse
214
This question already has an answer here:
Given a set of rectangles, do any overlap?
3 answers
find overlapping rectangles algorithm
12 answers
I have a list of rectangles sorted by priority.
While we iterate this List, I will insert a rectangle element into a Set. This set includes discrete rectangles. It means that all rectangles in Set should not overlap each other.
The below code has O(n^2) time complexity. But there seems to be a better way.
public Collection<Box> removeOverlapping(Collection<Box> boxList) {
Collection<Box> boxListRemovedOverlapping = new LinkedList<>();
for (Box box : boxList) {
boolean overlapping = false;
for (Box compBox : boxListRemovedOverlapping) {
if (isBoxOverlapped(box, compBox)) {
overlapping = true;
break;
}
}
if (!overlapping) {
boxListRemovedOverlapping.add(box);
}
}
return boxListRemovedOverlapping;
}
This question already has an answer here:
Given a set of rectangles, do any overlap?
3 answers
find overlapping rectangles algorithm
12 answers
java algorithm data-structures collections
java algorithm data-structures collections
edited Nov 13 at 6:46
Abhinav
296111
asked Nov 13 at 5:24
Bongousse
214
edited Nov 13 at 6:46
Abhinav
296111
asked Nov 13 at 5:24
Bongousse
214
edited Nov 13 at 6:46
Abhinav
296111
edited Nov 13 at 6:46
Abhinav
296111
edited Nov 13 at 6:46
Abhinav
296111
296111
asked Nov 13 at 5:24
Bongousse
214
asked Nov 13 at 5:24
Bongousse
214
asked Nov 13 at 5:24
Bongousse
214
214
marked as duplicate by Andreas java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.
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Nov 13 at 5:30
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marked as duplicate by Andreas java
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Nov 13 at 5:30
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33
|
show 1 more comment
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33
|
show 1 more comment
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PZQj8xzt,TcBkby1Z8a,HJD4E3Q9rJRKawfci2B0n5iEcK38UJkYVdjW3,LgnG5S
"But there seems to be a better way" What way would that be, and if so, why didn't you use it?
– Andreas
Nov 13 at 5:26
What is condition of overlapped box?
– htpvl
Nov 13 at 5:31
@Andreas I am looking for it.
– Bongousse
Nov 13 at 5:32
@htpvl The overlapped means one box includes the other or intersects with it.
– Bongousse
Nov 13 at 5:33
Consider some BSP data structure like R-tree
– MBo
Nov 13 at 5:33