let say i have fallowing javascript function-
function isDigit (c)
{ return ((c >= "0") && (c <= "9"))
}
function isAlphabet (c)
{
return ( (c >= "a" && c <= "z") || (c >= "A" && c <= "Z") )
}
How can i write same thing in java. Thanks.
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3 Answers
Use java.lang.Character class methods.
5 Comments
Harry Joy
@AndreyAdamovich : Links are for jdk 5 update them for jdk 6.
Andrey Adamovich
@Harry, methods didn't really change since that and I can't really edit my comments :)
Andrew Thompson
@Andrey For tips on getting a link to the latest JavaDocs, see point 2.
Peter Lawrey
Worth nothing that the Character equivalents handle all character sets. e.g. 208 characters are digits.
Respectively:
java.lang.Character.isLetter(c);
java.lang.Character.isDigit(c);
But if you want to make your own implementations:
boolean isAlpa(char c) {
return c >= 'A' && c <= 'Z'; /* single characters are
enclosed with single quotes */
}
Comments
public boolean isDigit(char c) {
return ((c >= '0') && (c <= '9'));
}
public boolean isAlphabet(char c) {
return ( (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') );
}
answered Sep 26, 2011 at 10:48
Andrey Adamovich
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