Powerful RegEx tool: matchresult in org. Apache. Oro. Text. RegEx

Matchresult can be understood as a combination of string matching RegEx pattern and some state items.

But there are two points to note:

1. Frequently used:

Result = matcher. getmatch ();

The returned matchresult is the result obtained when contains is used this time. Next, call a new round of contains (), and then use getmatch () to return a new round of results.

2. Understanding of a concept: Group

The so-called group is the group used in pattern RegEx.

For example, a RegEx is: (\ D +) (ABC)

The result of "(\ D +)" match corresponds to Group 1.

The result of "(ABC)" Match corresponds to group 2.

Group 0 indicates the entire match. Result. group (0) has the same effect as result. tostring.

Note that the number of group groups is at least 1 (because it includes at least the entire match !)