Java RegEx - Regular expression to split a paragraph with start and end

Question

I am new to java regex.Please help me. Consider the below paragraph,

Paragraph :

            Name abc
            sadghsagh
            hsajdjah N         


        

Answer 1

The following should also do if you want to keep both Name and !!! in the results.

String[] parts = string.split("(?=(Name|!!!))");

Edit: here's the corrected version:

String[] parts = string.split("(?<=!!!)\\s*(?=Name)");

This will split on any whitespace between !!! and Name and nothing else; hereby keeping the both parts. If you don't want to split on !!!Name, then replace \\s* by \\s+ to allow a one-to-many match instead of zero-to-many match.

Edit2: attached an example of the input/output. Input is copied from the topicstart:

String string = "Name hhhhh class0" + "\n" + "HHHHHHHHHHHHHHHHHH" + "\n" + "!" + "\n"
    + "Name TTTTT TTTT" + "\n" + "GGGGGG UUUUU IIII" + "\n" + "!" + "\n"
    + "Name JJJJJ WWWW" + "\n" + "IIIIIIIIIIIIIIIIIIIII" + "\n" + "!" + "\n"
    + "RRRRRRRRRRR TTTTTTTT" + "\n" + "HHHHHH" + "\n" + "JJJJJ 1 Name class1" + "\n"
    + "LLLLL 5 Name class5" + "\n" + "!" + "\n" + "OOOOOO HHHH FFFFFF" + "\n"
    + "service 0 Name class12" + "\n" + "!" + "\n" + "JJJJJ YYYYYY 3/0" + "\n" + "KKKKKKK"
    + "\n" + "UUU UUU UUUUU" + "\n" + "QQQQQQQ" + "\n" + "!";

String[] parts = string.split("(?<=!)\\s*(?=Name)");
for (String part : parts) {
    System.out.println(part);
    System.out.println("---------------------------------");
}

Output:

Name hhhhh class0
HHHHHHHHHHHHHHHHHH
!
---------------------------------
Name TTTTT TTTT
GGGGGG UUUUU IIII
!
---------------------------------
Name JJJJJ WWWW
IIIIIIIIIIIIIIIIIIIII
!
RRRRRRRRRRR TTTTTTTT
HHHHHH
JJJJJ 1 Name class1
LLLLL 5 Name class5
!
OOOOOO HHHH FFFFFF
service 0 Name class12
!
JJJJJ YYYYYY 3/0
KKKKKKK
UUU UUU UUUUU
QQQQQQQ
!
---------------------------------

Looks fine?