Is there a way to count the number of times a word has repeated in a string?
My string has over 100000 words. Its a book. It contains about x number of chapters:
chapter 1
text text text
chapter 2
text text text
and so on
How do I get the total number of chapters?(last chapter number)?
for example: chapter 117
I tried this :
String words = book.split(" ");
ArrayList<Integer> chapterPositions = new ArrayList<Integer>();
int count = 0;
for (String a : words) {
if (a.equals("Chapter")) {
chapterPositions.add(count + 1);
}
count++;
}
num_chapters = Integer.parseInt(words[(chapterPositions.get(chapterPositions.size() - 1))]);
Toast.makeText(getApplicationContext(), Integer.toString(num_chapters), Toast.LENGTH_LONG).show();
but get exception :NumberFormatException: For input string: "1 The"
java string
asked Nov 26 '18 at 1:45
user9555243user9555243
408
add a comment |
My string has over 100000 words. Its a book. It contains about x number of chapters:
chapter 1
text text text
chapter 2
text text text
and so on
How do I get the total number of chapters?(last chapter number)?
for example: chapter 117
I tried this :
String words = book.split(" ");
ArrayList<Integer> chapterPositions = new ArrayList<Integer>();
int count = 0;
for (String a : words) {
if (a.equals("Chapter")) {
chapterPositions.add(count + 1);
}
count++;
}
num_chapters = Integer.parseInt(words[(chapterPositions.get(chapterPositions.size() - 1))]);
Toast.makeText(getApplicationContext(), Integer.toString(num_chapters), Toast.LENGTH_LONG).show();
but get exception :NumberFormatException: For input string: "1 The"
java string
asked Nov 26 '18 at 1:45
user9555243user9555243
408
This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01
add a comment |
My string has over 100000 words. Its a book. It contains about x number of chapters:
chapter 1
text text text
chapter 2
text text text
and so on
How do I get the total number of chapters?(last chapter number)?
for example: chapter 117
I tried this :
String words = book.split(" ");
ArrayList<Integer> chapterPositions = new ArrayList<Integer>();
int count = 0;
for (String a : words) {
if (a.equals("Chapter")) {
chapterPositions.add(count + 1);
}
count++;
}
num_chapters = Integer.parseInt(words[(chapterPositions.get(chapterPositions.size() - 1))]);
Toast.makeText(getApplicationContext(), Integer.toString(num_chapters), Toast.LENGTH_LONG).show();
but get exception :NumberFormatException: For input string: "1 The"
java string
asked Nov 26 '18 at 1:45
user9555243user9555243
408
My string has over 100000 words. Its a book. It contains about x number of chapters:
chapter 1
text text text
chapter 2
text text text
and so on
How do I get the total number of chapters?(last chapter number)?
for example: chapter 117
I tried this :
String words = book.split(" ");
ArrayList<Integer> chapterPositions = new ArrayList<Integer>();
int count = 0;
for (String a : words) {
if (a.equals("Chapter")) {
chapterPositions.add(count + 1);
}
count++;
}
num_chapters = Integer.parseInt(words[(chapterPositions.get(chapterPositions.size() - 1))]);
Toast.makeText(getApplicationContext(), Integer.toString(num_chapters), Toast.LENGTH_LONG).show();
but get exception :NumberFormatException: For input string: "1 The"
java string
java string
asked Nov 26 '18 at 1:45
user9555243user9555243
408
asked Nov 26 '18 at 1:45
user9555243user9555243
408
edited Nov 26 '18 at 3:28
user9555243
asked Nov 26 '18 at 1:45
user9555243user9555243
408
asked Nov 26 '18 at 1:45
user9555243user9555243
408
asked Nov 26 '18 at 1:45
user9555243user9555243
408
408
This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01
add a comment |
This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01
This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01
add a comment |
2 Answers
2
active
oldest
votes
Because there is not only space, but there are also new line characters, tab, etc.. in your "book" string.
You should use this regular expression instead:
String words = book.split("\s+");
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
add a comment |
I think a better way would have been reading the file line by line and using a regular expression like Chapter\s+[0-9]+ with the Pattern and Matcher java classes and then count the number of match.
Thus you don't load the entire file in memory, you don't need to first iterate through the string to just split and then iterate again to find a match.
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Because there is not only space, but there are also new line characters, tab, etc.. in your "book" string.
You should use this regular expression instead:
String words = book.split("\s+");
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
add a comment |
Because there is not only space, but there are also new line characters, tab, etc.. in your "book" string.
You should use this regular expression instead:
String words = book.split("\s+");
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
add a comment |
Because there is not only space, but there are also new line characters, tab, etc.. in your "book" string.
You should use this regular expression instead:
String words = book.split("\s+");
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
Because there is not only space, but there are also new line characters, tab, etc.. in your "book" string.
You should use this regular expression instead:
String words = book.split("\s+");
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
answered Nov 26 '18 at 3:46
TheIronHeadTheIronHead
413
413
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
add a comment |
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
there are special characters as well
– user9555243
Nov 26 '18 at 3:55
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
man you are the G.O.A.T!!
– user9555243
Nov 26 '18 at 3:58
add a comment |
I think a better way would have been reading the file line by line and using a regular expression like Chapter\s+[0-9]+ with the Pattern and Matcher java classes and then count the number of match.
Thus you don't load the entire file in memory, you don't need to first iterate through the string to just split and then iterate again to find a match.
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
add a comment |
I think a better way would have been reading the file line by line and using a regular expression like Chapter\s+[0-9]+ with the Pattern and Matcher java classes and then count the number of match.
Thus you don't load the entire file in memory, you don't need to first iterate through the string to just split and then iterate again to find a match.
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
add a comment |
I think a better way would have been reading the file line by line and using a regular expression like Chapter\s+[0-9]+ with the Pattern and Matcher java classes and then count the number of match.
Thus you don't load the entire file in memory, you don't need to first iterate through the string to just split and then iterate again to find a match.
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
I think a better way would have been reading the file line by line and using a regular expression like Chapter\s+[0-9]+ with the Pattern and Matcher java classes and then count the number of match.
Thus you don't load the entire file in memory, you don't need to first iterate through the string to just split and then iterate again to find a match.
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
answered Nov 26 '18 at 5:36
Saptarshi BasuSaptarshi Basu
2,04421627
2,04421627
add a comment |
add a comment |
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This could be done easily in Linux but are you using Java here?
– JorgeeFG
Nov 26 '18 at 1:58
yes sir. absolutely
– user9555243
Nov 26 '18 at 2:01