从背面搜索时如何从一部分字符串中获取子字符串

Question

I have a string with code from another JAVA class and i am extracting Doc comments. I have a string with the following content:

"public static String[] scanread() throws Exception{"

I need to get the "scanread()" how can i extract that? I was hoping something that looks for ")" and continues reading right to left until it reaches white space, then extracts it. I am not too sure how would i do that. Also with this i am worried if there is a space between "scanread" and "()" that might not work.

Any help would be awesome.

Thanks

Answer 1

Use the below regex along with Pattern and Matcher classes.

"\\S+\\)"

OR

"\\S+\\s*\\(\\)"

\\S+ matches one or more non-space characters , so this matches all the non-space characters which exists before to ) bracket, including the bracket.

DEMO

String s = "public static String[] scanread() throws Exception{";
Matcher m = Pattern.compile("\\S+\\)").matcher(s);
while(m.find()){
System.out.println(m.group());
}

Output:

scanread()