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The point is that if i feed it a name with a first and last name, it should find the space and return everything after the space... but i keep getting an error Dr. Java. Am i using charAt correctly?
If somebody could help me with this it would be kindly noted. Thank you!
here is the code:
public static String getLastName(String author)
{int space =author.charAt(" ");String lastName=author.substring(space+1);return lastName;}
no you are not using the method correctly. The parameter for the charAt() method is an int not a char. It takes the index and returns a char.
I think you want to use the indexOf( ... ) method; read the API documentation for the String class and you know everything.
kind regards,
Jos
The CharAt method returns the char at the index you mention.
For exmaple:
st = "abcd";
st.CharAt(2) equals to "c" .
As josAH said, I think you mean IndexOf, anyway you still can do it with CharAt:
run a loop on the whole string checking each char if it equals to " " .
if found return the index of the next char (last name start). // "john smith" that should return 5 (make sure you count from 0!).
else return -1
Then check the returned value,
if >-1
cut the string from the returned value till the end (st.length()) you might ask why not length()-1? the SubString method cuts from x to y-1.
Check this page to get more information: String (Java 2 Platform SE v1.4.2)
I was unsure of what you meant by API documentation until tnrh1 posted the link. It's super helpful! I'm a newbie at Java so thank you very much! It works now.