Java: Sudoku puzzle generation not working properly
I am trying to make a sudoku app, and in it I am generating each puzzle. My generation, I thought, should work flawlessly, yet my app continues to crash. I think it is coming from here and on:
If(_band == 2) {
while((band2.contains(placeholder)) || (band2.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1),(int)(9));
}
band2.add(Double.valueOf(placeholder));
}
This goes from band2 to band9, checking each band before it for a duplicate number in the same position and checking its band for a duplicate number.
If it helps, band3 generation looks like this:
If(_band == 3) {
while((band3.contains(placeholder)) || (band3.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue()) || (band3.get((int)(_stack - 1)).doubleValue() == band2.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1)), ((int)(9));
}
band3.add(Double.valueOf(placeholder));
}
The error code is always:
Invalid List Operation
: Index: 0, Size: 0
android while-loop sudoku asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
add a comment |
I am trying to make a sudoku app, and in it I am generating each puzzle. My generation, I thought, should work flawlessly, yet my app continues to crash. I think it is coming from here and on:
If(_band == 2) {
while((band2.contains(placeholder)) || (band2.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1),(int)(9));
}
band2.add(Double.valueOf(placeholder));
}
This goes from band2 to band9, checking each band before it for a duplicate number in the same position and checking its band for a duplicate number.
If it helps, band3 generation looks like this:
If(_band == 3) {
while((band3.contains(placeholder)) || (band3.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue()) || (band3.get((int)(_stack - 1)).doubleValue() == band2.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1)), ((int)(9));
}
band3.add(Double.valueOf(placeholder));
}
The error code is always:
Invalid List Operation
: Index: 0, Size: 0
android while-loop sudoku asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35
add a comment |
I am trying to make a sudoku app, and in it I am generating each puzzle. My generation, I thought, should work flawlessly, yet my app continues to crash. I think it is coming from here and on:
If(_band == 2) {
while((band2.contains(placeholder)) || (band2.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1),(int)(9));
}
band2.add(Double.valueOf(placeholder));
}
This goes from band2 to band9, checking each band before it for a duplicate number in the same position and checking its band for a duplicate number.
If it helps, band3 generation looks like this:
If(_band == 3) {
while((band3.contains(placeholder)) || (band3.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue()) || (band3.get((int)(_stack - 1)).doubleValue() == band2.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1)), ((int)(9));
}
band3.add(Double.valueOf(placeholder));
}
The error code is always:
Invalid List Operation
: Index: 0, Size: 0
android while-loop sudoku asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
I am trying to make a sudoku app, and in it I am generating each puzzle. My generation, I thought, should work flawlessly, yet my app continues to crash. I think it is coming from here and on:
If(_band == 2) {
while((band2.contains(placeholder)) || (band2.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1),(int)(9));
}
band2.add(Double.valueOf(placeholder));
}
This goes from band2 to band9, checking each band before it for a duplicate number in the same position and checking its band for a duplicate number.
If it helps, band3 generation looks like this:
If(_band == 3) {
while((band3.contains(placeholder)) || (band3.get((int)(_stack - 1)).doubleValue() == band1.get((int)(_stack - 1)).doubleValue()) || (band3.get((int)(_stack - 1)).doubleValue() == band2.get((int)(_stack - 1)).doubleValue())) {
placeholder = SketchwareUtil.getRandom((int)(1)), ((int)(9));
}
band3.add(Double.valueOf(placeholder));
}
The error code is always:
Invalid List Operation
: Index: 0, Size: 0
android while-loop sudoku android while-loop sudoku asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
edited Nov 14 '18 at 23:30
LawnLivingStudios
asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
asked Nov 14 '18 at 21:54
LawnLivingStudiosLawnLivingStudios
44
44
All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35
add a comment |
All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35
All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35
add a comment |
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All code should be indented by at least 4 spaces, that's why.
– takendarkk
Nov 14 '18 at 22:15
It is described in the markdown help, And there are even little short-cut widgets in the editor window to do it!
– Stephen C
Nov 14 '18 at 22:31
It would help if you could post your stack trace as well. what errors do you get?
– Nikos Hidalgo
Nov 14 '18 at 22:35