invalid method declaration, return type require

[bostero]

public String(String num){
if (num == null) {
return "N/A";
}
int len = num.length();
int c = 0;
char[] sb = new char[len];
for (int i = 0; i < len; i++) {
sb[c++] = num.charAt(i);
if ((len - 1 - i) % 3 == 0 && i != len - 1) {
sb[c++] = ',';
}
}
return new String(sb);
}
}
This is the code and I can not find why it is giving me that error when compiling

 

[Bong]

The name of your method is "String". That, in and of iteslf is a bad idea. You do not specify what type of data is returned (as in public String MethodName(args) {}), yet you return a String ( return new String(sb);).

_________________
Bob Rashkin

 

[bostero]

how about is I do this
public class Main{
public String name(String num) {
if (num == null) {
return "N/A";
}
int len = num.length();
int c = 0;
char[] sb = new char[len];
for (int i = 0; i < len; i++) {
sb[c++] = num.charAt(i);
if ((len - 1 - i) % 3 == 0 && i != len - 1) {
sb[c++] = ',';
}
}
return new String(sb);
}
}

 

[Bong]

That looks ok but naming a method "name" is probably an invitation to problems, too.

_________________
Bob Rashkin

 

[Diancecht]

Same calling a class Main