What is this Java-code doing?

Question

I tried to find out what this part of a JAVA code is doing.
I think that there are the two Strings 'target' and 'phrase'
declared and initialized, however, what is the value of each
of these two Strings then respectively what is the return value??
Here youe see the code:
1:....
2: private String O00OoO0O0oOoo00O00oo(String target, String phrase)
3: {
4: for(; target.length() > phrase.length(); phrase += phrase);
5: String s1 = "";
6: for(int i = 0; i < target.length(); i++)
7: s1 = s1 + "" + (char)((phrase.charAt(i) + target.charAt 8: (i)) - i);
9:
10: return s1;
11: }
thx for help!

Answer 1

I wrote the following program :
public static void{
1: private String abcdefghabcdefgh(String target, String phrase)
2: {  
3: for(; target.length() > phrase.length(); phrase += phrase);
4: String a = "";
5: for(int i = 0; i < target.length(); i++)
6: a = a + "" + (char)(target.charAt(i) - phrase.charAt(i) - i);
7: System.out.println(a);
8: return a;
9: }
10: String pass="xxxx";
11: String ssap="oooo";
12: String test = "";
13: test = abcdefghabcdefgh(pass, ssap);
14: System.out.println(test);
15:}
But I always got an error when I tried to compile it...
and i tried to find out for hours a de5cription for this function...
Actually I found the de5cription for String(String original) in the
API documentation, and I think this is what I wrote in line 1...
I tried so much versions so that this function would work...
but it didn't at all. (Actually I think that I importet all the java classes
I need). What the hell are I'm doing Wrong???!!!