I have a string like
String myString = "hello world~~hello~~world"
I am using the split method like this
String[] temp = myString.split("~|~~|~~~");
I want the array temp to contain only the strings separated by ~, ~~ or ~~~.
However, the temp array thus created has length 5, the 2 additional 'strings' being empty strings.
I want it to ONLY contain my non-empty string. Please help. Thank you!
You should use quantifier with your character:
String[] temp = myString.split("~+");
String#split() takes a regex. ~+ will match 1 or more ~, so it will split on ~, or ~~, or ~~~, and so on.
Also, if you just want to split on ~, ~~, or ~~~, then you can limit the repetition by using {m,n} quantifier, which matches a pattern from m to n times:
String[] temp = myString.split("~{1,3}");
When you split it the way you are doing, it will split a~~b twice on ~, and thus the middle element will be an empty string.
You could also have solved the problem by reversing the order of your delimiter like this:
String[] temp = myString.split("~~~|~~|~");
That will first try to split on ~~, before splitting on ~ and will work fine. But you should use the first approach.
+ is a regex quantifier which means match the precedent token 1 or more times. Which means it will also cover ~~~~~~~~~~~ :-)
+, but he is asking to "...contain only the strings separated by ~, ~~ or ~~~.", so maybe "~{1,3}" is better
Just turn the pattern around:
String myString = "hello world~~hello~~world";
String[] temp = myString.split("~~~|~~|~");
Try This :
myString.split("~~~|~~|~");
It will definitely works. In your code, what actually happens that when ~ occurs for the first time,it count as a first separator and split the string from that point. So it doesn't get ~~ or ~~~ anywhere in your string though it is there. Like :
[hello world]~[]~[hello]~[]~[world]
Square brackets are split-ed in to 5 different string values.
