The print gives me, "This is a test"

I don't understand why it is not giving me, "This%20is%20a%20test"

Thanks for the help!

This post was edited by xandumx on Apr 19 2013 04:31pm

read the spec for replaceAll

here's another hint: Strings are immutable

This post was edited by irimi on Apr 19 2013 04:40pm

Spec:
Replaces each substring of this string that matches the given regular expression with the given replacement.

I am finding examples of people using this just like I am and saying it works. I am not sure what the replace or replace all function is used for if not for this...

public String replaceAll(String regex, String replacement)

replaceAll returns a new string, it doesn't change the string passed in

you missed the most important part of the spec, which is the method signature

replace all uses a regular expression.

try again using replace()



this as well

This post was edited by AbDuCt on Apr 19 2013 04:55pm

surprisingly that's not the issue. you *can* use a regex but it's not necessary (i think. actually, maybe i'm wrong about this).

This post was edited by irimi on Apr 19 2013 04:57pm

Thanks guys!

This post was edited by xandumx on Apr 19 2013 05:04pm

For the sake of completeness, you should use StringBuffer (http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/StringBuffer.html) when doing operations such as replace, concatenation etc on strings.

1) stringbuilder > stringbuffer in most cases
2) not much point in using sb during concatentation unless loops or similar are involved. the compiler optimizes string literal concatenation. it'll also convert variable concatenation, but not it tends to suck in loops because it'll keep creating new sbs.
3) there isn't really a performance benefit to using replace just once. you still have the original string and the new string as two separate objects either way.

This post was edited by carteblanche on Apr 22 2013 11:28am