Pattern to extract text between parenthesis

How to extract string from "(" and ")" using pattern matching or anything. For example if the text is

"Hello (Java)"

Then how to get only "Java"?

Try this:

String x = "Hello (Java)";
Matcher m = Pattern.compile("\\((.*?)\\)").matcher(x);
while (m.find()) {
    System.out.println(m.group(1));
}

or

String str = "Hello (Java)";
String answer = str.substring(str.indexOf("(")+1, str.indexOf(")"));

List<String> matchList = new ArrayList<String>();
Pattern regex = Pattern.compile("\\((.*?)\\)");
Matcher regexMatcher = regex.matcher("Hello This is (Java) Not (.NET)");

while (regexMatcher.find()) {//Finds Matching Pattern in String
   matchList.add(regexMatcher.group(1));//Fetching Group from String
}

for(String str:matchList) {
   System.out.println(str);
}

OUTPUT

Java
.NET

What does \\((.+?)\\) mean?

This regular Expression pattern will start from \\( which will match ( as it is reserved in regExp so we need escape this character,same thing for \\) and (.*?) will match any character zero or more time anything moreover in () considered as Group which we are finding.