Java substring a local variable inside a while loop

Question

I have been trying to construct a while loop for looping through a string when it contains a \'pattern\' i\'m looking for. The string is a local variable, declared just above th

Answer 1

Strings are immutable. That means that substring does not modify the string itself, but returns a new string object. So you should use:

modifiedOnlineList = modifiedOnlineList.substring(tempFirstOccurence + 2);

Answer 2

String is immutable in java

 modifiedOnlineList = modifiedOnlineList.substring(tempFirstOccurence + 2);

You have to receive the new String Object returned by substring method.

 modifiedOnlineList.substring(tempFirstOccurence + 2);
 System.out.println(modifiedOnlineList);   // still old value 

when you receive that

 modifiedOnlineList = modifiedOnlineList.substring(tempFirstOccurence + 2);
 System.out.println(modifiedOnlineList);   // now re assigned to substring value 

Answer 3

modifiedOnlineList.substring() just returns a substring of the original modifiedOnlineList, it doesn't modify modifiedOnlineList.