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Someone help plz

1 reply on 1 page. Most recent reply: Jul 31, 2003 6:36 AM by David

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JOhnny

Posts: 1
Nickname: horis
Registered: Jul, 2003

Someone help plz Posted: Jul 30, 2003 2:29 AM
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I'm total n00bie in Java and i cant find the answer to my problem:
I need in public void do this:
s="anotherstring"
dosomething("string")

private String dosomething(String s)
{
String s1 = "";
for(int i = 0; i < s.length(); i++)
s1 = s1 + "" + (char)(s.charAt(i) - 1);
return s1;
}

So, what happens in this function? Can someone explain me? And what does those +"" and (char)??


David

Posts: 150
Nickname: archangel
Registered: Jul, 2003

Re: Someone help plz Posted: Jul 31, 2003 6:36 AM
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Sounds to me like you could do with reading some introductory tutorials to Java.

'+' is the concatenation operator which 'joins' strings together.

'(char)' is a cast. It forces whatever is on its right to become a character.

If you ran this program, you'd see what it does. It changes each character in the string, moving it to the previous letter in the alphabet (that's why it is -1).

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