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Converet Char to UpperCase

6 replies on 1 page. Most recent reply: May 12, 2003 2:16 AM by Adam Duffy

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Kevin

Posts: 27
Nickname: quasi
Registered: Apr, 2003

Converet Char to UpperCase Posted: May 2, 2003 12:46 AM
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How do convert a char to uppercase?
Whenever I try to I get an error
char cannot be dereferenced what does this mean?


Rahul

Posts: 52
Nickname: wildhorse
Registered: Oct, 2002

Re: Converet Char to UpperCase Posted: May 2, 2003 3:22 AM
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It would be easier to explain the error if the code was present.

Currently, you can use this method. There may be better ways of conversion though.

Store the 'char' in a 'short' or 'byte' (if you are sure its going to be an alphabet):

byte b = 'a';

To convert to Uppercase, subtract 32 from its present ascii value and cast it back to 'char':

(char)b-32;

This should help.

Adam Duffy

Posts: 168
Nickname: adamduffy
Registered: Feb, 2003

Re: Converet Char to UpperCase Posted: May 2, 2003 6:30 AM
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To convert a character to uppercase use the following code

char lowercase = 'x';
char uppercase = Character.toUpperCase( lowercase );

This converts the character argument to uppercase using case mapping information from the UnicodeData file.

Adam

Kevin

Posts: 27
Nickname: quasi
Registered: Apr, 2003

Re: Converet Char to UpperCase Posted: May 3, 2003 5:08 AM
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Thanks Adam your code worked

Arbab-ul-hassan

Posts: 4
Nickname: umpirepk
Registered: Dec, 2002

Re: Converet Char to UpperCase Posted: May 9, 2003 4:21 AM
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This Is The Code:
public class ATest{
public static void main(String args[]){

int b='a';
int c=b-32;
char d=(char)c;

System.out.println(d);
}
}

Neil

Posts: 5
Nickname: no158
Registered: May, 2003

Re: Converet Char to UpperCase Posted: May 10, 2003 12:09 PM
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when you did that -32 to the char 'b' is that going to run the char through the ASCI code to the capital letters? If yes does that work with all letters in the alphabet

Adam Duffy

Posts: 168
Nickname: adamduffy
Registered: Feb, 2003

Re: Converet Char to UpperCase Posted: May 12, 2003 2:16 AM
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The -32 solution (for want of a better name) will work for the English alphabet - possibly other alphabets too. However, it is better to use the

Character.toUpperCase( myCharacter );


method since this will take account for all alphabets that exist in Unicode and it means you don't have to worry about localisation problems with your code. In short, let Java worry about the details.

Adam

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