How does the replaceAll java method work?
I'm trying to figure out how the str.replaceAll(string, newString) method works. I know how to use it, but I'm trying to figure out what goes on inside the method. Does it use multiple for loops and strings, or something more advanced than that? Ideas, pseudocode, and code examples would be lovely.
PS I've already searched this up, but it only shows how to use it, not how it works.
java string
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
|
show 2 more comments
I'm trying to figure out how the str.replaceAll(string, newString) method works. I know how to use it, but I'm trying to figure out what goes on inside the method. Does it use multiple for loops and strings, or something more advanced than that? Ideas, pseudocode, and code examples would be lovely.
PS I've already searched this up, but it only shows how to use it, not how it works.
java string
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
1
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Pore over the source code ofString#replaceAll, debug some places to figure it out :)
– Andrew Tobilko
Nov 20 '18 at 23:00
2
I you use an IDE you can easily see the code, LIke with intelliJ with pressctrland click on the method name to see the implementation
– azro
Nov 20 '18 at 23:02
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03
|
show 2 more comments
I'm trying to figure out how the str.replaceAll(string, newString) method works. I know how to use it, but I'm trying to figure out what goes on inside the method. Does it use multiple for loops and strings, or something more advanced than that? Ideas, pseudocode, and code examples would be lovely.
PS I've already searched this up, but it only shows how to use it, not how it works.
java string
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
I'm trying to figure out how the str.replaceAll(string, newString) method works. I know how to use it, but I'm trying to figure out what goes on inside the method. Does it use multiple for loops and strings, or something more advanced than that? Ideas, pseudocode, and code examples would be lovely.
PS I've already searched this up, but it only shows how to use it, not how it works.
java string
java string
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
edited Nov 20 '18 at 23:38
GBlodgett
9,24741633
9,24741633
asked Nov 20 '18 at 22:58
bob larry
111
asked Nov 20 '18 at 22:58
bob larry
111
asked Nov 20 '18 at 22:58
bob larry
111
111
1
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Pore over the source code ofString#replaceAll, debug some places to figure it out :)
– Andrew Tobilko
Nov 20 '18 at 23:00
2
I you use an IDE you can easily see the code, LIke with intelliJ with pressctrland click on the method name to see the implementation
– azro
Nov 20 '18 at 23:02
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03
|
show 2 more comments
1
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Pore over the source code ofString#replaceAll, debug some places to figure it out :)
– Andrew Tobilko
Nov 20 '18 at 23:00
2
I you use an IDE you can easily see the code, LIke with intelliJ with pressctrland click on the method name to see the implementation
– azro
Nov 20 '18 at 23:02
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03
1
1
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Pore over the source code of
String#replaceAll, debug some places to figure it out :)– Andrew Tobilko
Nov 20 '18 at 23:00
Pore over the source code of
String#replaceAll, debug some places to figure it out :)– Andrew Tobilko
Nov 20 '18 at 23:00
2
2
I you use an IDE you can easily see the code, LIke with intelliJ with press
ctrl and click on the method name to see the implementation– azro
Nov 20 '18 at 23:02
I you use an IDE you can easily see the code, LIke with intelliJ with press
ctrl and click on the method name to see the implementation– azro
Nov 20 '18 at 23:02
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03
|
show 2 more comments
1 Answer
1
active
oldest
votes
According to the source code for String#replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
It creates a Pattern and uses regex to replace the target with the replacement.
In case you want to know about the Matcher#replaceAll call:
public String replaceAll(String replacement) {
reset();
boolean result = find();
if (result) {
StringBuffer sb = new StringBuffer();
do {
appendReplacement(sb, replacement);
result = find();
} while (result);
appendTail(sb);
return sb.toString();
}
return text.toString();
}
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
According to the source code for String#replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
It creates a Pattern and uses regex to replace the target with the replacement.
In case you want to know about the Matcher#replaceAll call:
public String replaceAll(String replacement) {
reset();
boolean result = find();
if (result) {
StringBuffer sb = new StringBuffer();
do {
appendReplacement(sb, replacement);
result = find();
} while (result);
appendTail(sb);
return sb.toString();
}
return text.toString();
}
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
add a comment |
According to the source code for String#replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
It creates a Pattern and uses regex to replace the target with the replacement.
In case you want to know about the Matcher#replaceAll call:
public String replaceAll(String replacement) {
reset();
boolean result = find();
if (result) {
StringBuffer sb = new StringBuffer();
do {
appendReplacement(sb, replacement);
result = find();
} while (result);
appendTail(sb);
return sb.toString();
}
return text.toString();
}
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
add a comment |
According to the source code for String#replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
It creates a Pattern and uses regex to replace the target with the replacement.
In case you want to know about the Matcher#replaceAll call:
public String replaceAll(String replacement) {
reset();
boolean result = find();
if (result) {
StringBuffer sb = new StringBuffer();
do {
appendReplacement(sb, replacement);
result = find();
} while (result);
appendTail(sb);
return sb.toString();
}
return text.toString();
}
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
According to the source code for String#replaceAll:
public String replaceAll(String regex, String replacement) {
return Pattern.compile(regex).matcher(this).replaceAll(replacement);
}
It creates a Pattern and uses regex to replace the target with the replacement.
In case you want to know about the Matcher#replaceAll call:
public String replaceAll(String replacement) {
reset();
boolean result = find();
if (result) {
StringBuffer sb = new StringBuffer();
do {
appendReplacement(sb, replacement);
result = find();
} while (result);
appendTail(sb);
return sb.toString();
}
return text.toString();
}
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
edited Nov 20 '18 at 23:11
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
answered Nov 20 '18 at 23:04
GBlodgett
9,24741633
9,24741633
add a comment |
add a comment |
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1
Related: stackoverflow.com/questions/261015/…
– Michael Butscher
Nov 20 '18 at 22:59
Pore over the source code of
String#replaceAll, debug some places to figure it out :)– Andrew Tobilko
Nov 20 '18 at 23:00
2
I you use an IDE you can easily see the code, LIke with intelliJ with press
ctrland click on the method name to see the implementation– azro
Nov 20 '18 at 23:02
@azro - you can also just middle-click on any object, method, etc.
– Zephyr
Nov 20 '18 at 23:03
@Zephyr not sure we need to discuss all shorcut that exists ^^ :D
– azro
Nov 20 '18 at 23:03