Convert strings in an array to Title Case - JAVA
I have an array of objects (customer) that has components: first_Name & last_Name. I am trying to convert both the first name and last name of each customer to title case. I have tried making several different methods that will convert strings to title case, but all of them have failed. This is the last thing I have tried and I cannot figure out why it would not capitalize the first letter of the first name and the first letter of the last name.
for (Customer c : customers){
c.setFirst_name(c.getFirst_name().charAt(0).toUpperCase());
}
I have checked that the first name and last name indeed contain an only-letter string with a lower case letter as the first letter in each. The error intellisense is giving me is that "char cannot be dereferenced"
java
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
add a comment |
I have an array of objects (customer) that has components: first_Name & last_Name. I am trying to convert both the first name and last name of each customer to title case. I have tried making several different methods that will convert strings to title case, but all of them have failed. This is the last thing I have tried and I cannot figure out why it would not capitalize the first letter of the first name and the first letter of the last name.
for (Customer c : customers){
c.setFirst_name(c.getFirst_name().charAt(0).toUpperCase());
}
I have checked that the first name and last name indeed contain an only-letter string with a lower case letter as the first letter in each. The error intellisense is giving me is that "char cannot be dereferenced"
java
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
1
Hint: What doesc.getFirst_name().charAt(0)return?
– John3136
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30
add a comment |
I have an array of objects (customer) that has components: first_Name & last_Name. I am trying to convert both the first name and last name of each customer to title case. I have tried making several different methods that will convert strings to title case, but all of them have failed. This is the last thing I have tried and I cannot figure out why it would not capitalize the first letter of the first name and the first letter of the last name.
for (Customer c : customers){
c.setFirst_name(c.getFirst_name().charAt(0).toUpperCase());
}
I have checked that the first name and last name indeed contain an only-letter string with a lower case letter as the first letter in each. The error intellisense is giving me is that "char cannot be dereferenced"
java
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
I have an array of objects (customer) that has components: first_Name & last_Name. I am trying to convert both the first name and last name of each customer to title case. I have tried making several different methods that will convert strings to title case, but all of them have failed. This is the last thing I have tried and I cannot figure out why it would not capitalize the first letter of the first name and the first letter of the last name.
for (Customer c : customers){
c.setFirst_name(c.getFirst_name().charAt(0).toUpperCase());
}
I have checked that the first name and last name indeed contain an only-letter string with a lower case letter as the first letter in each. The error intellisense is giving me is that "char cannot be dereferenced"
java
java
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
asked Nov 12 '18 at 22:16
William LovelessWilliam Loveless
155
155
1
Hint: What doesc.getFirst_name().charAt(0)return?
– John3136
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30
add a comment |
1
Hint: What doesc.getFirst_name().charAt(0)return?
– John3136
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30
1
1
Hint: What does
c.getFirst_name().charAt(0) return?– John3136
Nov 12 '18 at 22:19
Hint: What does
c.getFirst_name().charAt(0) return?– John3136
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30
add a comment |
3 Answers
3
active
oldest
votes
This method capitalizes the 1st char of the string and makes the rest lower case:
public static String toTitle(String s) {
return (s.length() > 0) ? s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase() : "";
}
so use it:
for (Customer c : customers){
c.setFirst_name(toTitle(c.getFirst_name()));
c.setLast_name(toTitle(c.getLast_name()));
}
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
add a comment |
String.charAt() returns a char, which is a primitive type and therefore does not have methods. So the toUpperCase() call is not allowed there.
What you probably want is to create a Character object there, maybe a String. We don't know because you never showed the setFirst_name() signature.
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
add a comment |
String values is immutable. You try to change the first cahracter. That does not work. You must make a new string: Extract the first character of the original string, convert it to upper case and append the rest of the original string.
answered Nov 12 '18 at 22:26
DonatDonat
699127
That is all true, but how is it relevant to the question? He is trying to pass a string to asetFirst_namemethod which likely just saysthis.firstName = namePassedIn;
– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas'stoTitle()is not modifying an immutable string it is creating several new strings and combining them to a new one.
– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (charAt()returns acharnot aStringso you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.
– John3136
Nov 12 '18 at 23:01
|
show 1 more comment
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
This method capitalizes the 1st char of the string and makes the rest lower case:
public static String toTitle(String s) {
return (s.length() > 0) ? s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase() : "";
}
so use it:
for (Customer c : customers){
c.setFirst_name(toTitle(c.getFirst_name()));
c.setLast_name(toTitle(c.getLast_name()));
}
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
add a comment |
This method capitalizes the 1st char of the string and makes the rest lower case:
public static String toTitle(String s) {
return (s.length() > 0) ? s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase() : "";
}
so use it:
for (Customer c : customers){
c.setFirst_name(toTitle(c.getFirst_name()));
c.setLast_name(toTitle(c.getLast_name()));
}
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
add a comment |
This method capitalizes the 1st char of the string and makes the rest lower case:
public static String toTitle(String s) {
return (s.length() > 0) ? s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase() : "";
}
so use it:
for (Customer c : customers){
c.setFirst_name(toTitle(c.getFirst_name()));
c.setLast_name(toTitle(c.getLast_name()));
}
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
This method capitalizes the 1st char of the string and makes the rest lower case:
public static String toTitle(String s) {
return (s.length() > 0) ? s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase() : "";
}
so use it:
for (Customer c : customers){
c.setFirst_name(toTitle(c.getFirst_name()));
c.setLast_name(toTitle(c.getLast_name()));
}
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
edited Nov 12 '18 at 22:39
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
answered Nov 12 '18 at 22:30
forpasforpas
11k2423
11k2423
add a comment |
add a comment |
String.charAt() returns a char, which is a primitive type and therefore does not have methods. So the toUpperCase() call is not allowed there.
What you probably want is to create a Character object there, maybe a String. We don't know because you never showed the setFirst_name() signature.
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
add a comment |
String.charAt() returns a char, which is a primitive type and therefore does not have methods. So the toUpperCase() call is not allowed there.
What you probably want is to create a Character object there, maybe a String. We don't know because you never showed the setFirst_name() signature.
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
add a comment |
String.charAt() returns a char, which is a primitive type and therefore does not have methods. So the toUpperCase() call is not allowed there.
What you probably want is to create a Character object there, maybe a String. We don't know because you never showed the setFirst_name() signature.
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
String.charAt() returns a char, which is a primitive type and therefore does not have methods. So the toUpperCase() call is not allowed there.
What you probably want is to create a Character object there, maybe a String. We don't know because you never showed the setFirst_name() signature.
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
edited Nov 13 '18 at 5:10
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
answered Nov 12 '18 at 22:58
Perdi EstaquelPerdi Estaquel
6631519
6631519
add a comment |
add a comment |
String values is immutable. You try to change the first cahracter. That does not work. You must make a new string: Extract the first character of the original string, convert it to upper case and append the rest of the original string.
answered Nov 12 '18 at 22:26
DonatDonat
699127
That is all true, but how is it relevant to the question? He is trying to pass a string to asetFirst_namemethod which likely just saysthis.firstName = namePassedIn;
– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas'stoTitle()is not modifying an immutable string it is creating several new strings and combining them to a new one.
– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (charAt()returns acharnot aStringso you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.
– John3136
Nov 12 '18 at 23:01
|
show 1 more comment
String values is immutable. You try to change the first cahracter. That does not work. You must make a new string: Extract the first character of the original string, convert it to upper case and append the rest of the original string.
answered Nov 12 '18 at 22:26
DonatDonat
699127
That is all true, but how is it relevant to the question? He is trying to pass a string to asetFirst_namemethod which likely just saysthis.firstName = namePassedIn;
– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas'stoTitle()is not modifying an immutable string it is creating several new strings and combining them to a new one.
– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (charAt()returns acharnot aStringso you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.
– John3136
Nov 12 '18 at 23:01
|
show 1 more comment
String values is immutable. You try to change the first cahracter. That does not work. You must make a new string: Extract the first character of the original string, convert it to upper case and append the rest of the original string.
answered Nov 12 '18 at 22:26
DonatDonat
699127
String values is immutable. You try to change the first cahracter. That does not work. You must make a new string: Extract the first character of the original string, convert it to upper case and append the rest of the original string.
answered Nov 12 '18 at 22:26
DonatDonat
699127
answered Nov 12 '18 at 22:26
DonatDonat
699127
answered Nov 12 '18 at 22:26
DonatDonat
699127
answered Nov 12 '18 at 22:26
DonatDonat
699127
699127
That is all true, but how is it relevant to the question? He is trying to pass a string to asetFirst_namemethod which likely just saysthis.firstName = namePassedIn;
– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas'stoTitle()is not modifying an immutable string it is creating several new strings and combining them to a new one.
– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (charAt()returns acharnot aStringso you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.
– John3136
Nov 12 '18 at 23:01
|
show 1 more comment
That is all true, but how is it relevant to the question? He is trying to pass a string to asetFirst_namemethod which likely just saysthis.firstName = namePassedIn;
– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas'stoTitle()is not modifying an immutable string it is creating several new strings and combining them to a new one.
– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (charAt()returns acharnot aStringso you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.
– John3136
Nov 12 '18 at 23:01
That is all true, but how is it relevant to the question? He is trying to pass a string to a
setFirst_name method which likely just says this.firstName = namePassedIn;– John3136
Nov 12 '18 at 22:30
That is all true, but how is it relevant to the question? He is trying to pass a string to a
setFirst_name method which likely just says this.firstName = namePassedIn;– John3136
Nov 12 '18 at 22:30
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
@John3136 Please look at the solution of forpas. T
– Donat
Nov 12 '18 at 22:45
Yes? Your point? forpas's
toTitle() is not modifying an immutable string it is creating several new strings and combining them to a new one.– John3136
Nov 12 '18 at 22:55
Yes? Your point? forpas's
toTitle() is not modifying an immutable string it is creating several new strings and combining them to a new one.– John3136
Nov 12 '18 at 22:55
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
forpas is implementing in Java code what I have described in english words.
– Donat
Nov 12 '18 at 22:58
String immutability has nothing to do with the question and is not related to the original issue (
charAt() returns a char not a String so you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.– John3136
Nov 12 '18 at 23:01
String immutability has nothing to do with the question and is not related to the original issue (
charAt() returns a char not a String so you can't call methods on it). As I said - everything your answer says is true, it just doesn't relate to the question.– John3136
Nov 12 '18 at 23:01
|
show 1 more comment
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1
Hint: What does
c.getFirst_name().charAt(0)return?– John3136
Nov 12 '18 at 22:19
Give an example of what you want to achieve.
– forpas
Nov 12 '18 at 22:19
It looks a duplicate of stackoverflow.com/questions/1086123/…
– AtulK
Nov 12 '18 at 22:20
What happens to McBrides and OConnells?
– Perdi Estaquel
Nov 12 '18 at 22:40
and "von Smith" or "de Smet" or "van de Kasteele"
– YoYo
Nov 12 '18 at 23:30