Java Matcher group() Method

The group method returns the matched input sequence captured by the previous match in the form of the string. This method returns the empty string when the pattern successfully matches the empty string in the input.

Signature

There are 3 types of group method in java. The signature of group methods are given below

Specified by

The group in interface MatchResult

Returns

The (possibly empty) subsequence matched by the previous match, in string form

Throws

IllegalStateException - If no match has yet been attempted, or if the previous match operation failed.

Example 1

Output:

Start :1, End : 4, Group abb Start :4, End : 7, Group abb Start :7, End : 10,Group abb 

Example 2

Output:

Group 0 is Group 1 s My name is Khan and m not a terrerist. 

Example 3

Output:

Hello world 

Note: Here the group name java contains all the alphabets both small and capital.