Java - How to regex this string?

Question

This is my input String:

String content = "Hello [To:admin1] Admin 1 , Good Morning [To:user2] 
                 Admin 1, GoodNight [To:user1] Admin 1";

I want to convert this to:

"Hello [To] Admin 1 , Good Morning [To] Admin 1, GoodNight [To] Admin 1"

I am trying to use Regular Expressions but I not able to.

I want replace the text [To:xxxx] with [To]

Please suggest what can be done.

`\[To:.*\]` should match, `\[To\]` should replace – mcalex Feb 15 '17 at 08:36 — mcalex, Feb 15 '17 at 08:36

score 5 · Accepted Answer · answered Feb 15 '17 at 08:36

5

You can use this :

String st = "Hello [To:admin1] Admin 1 , Good Morning [To:user2] Admin 1, GoodNight [To:user1] Admin 1";
st = st.replaceAll("\\[To:.*?\\]", "[To]");
System.out.println(st);

This will replace every thing between [To: and ] to [To], and this will show you :

Hello [To] Admin 1 , Good Morning [To] Admin 1, GoodNight [To] Admin 1

answered Feb 15 '17 at 08:36

Youcef LAIDANI

55,661
15
90
140

Tks you so much...word for me.. – cheng Feb 15 '17 at 09:04
you are welcome @cheng :) – Youcef LAIDANI Feb 15 '17 at 09:06
Sorry, i has check again....I think can mutiple accept mark :P...answer of Hardy Feng also great – cheng Feb 15 '17 at 09:40

score 2 · Answer 2 · answered Feb 15 '17 at 09:16

2

Just alternative solution by java regex.

    String st = "Hello [To:admin1] Admin 1 , Good Morning [To:user2] Admin 1, GoodNight [To:user1] Admin 1";
    Pattern pattern = Pattern.compile("\\[To:[a-zA-Z0-9]*\\]");
    String result = pattern.matcher(st).replaceAll("[To]");
    System.out.println(result);

answered Feb 15 '17 at 09:16

Hardy Feng

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4
13

Yes, it work for me too....tks Hardy Feng :D – cheng Feb 15 '17 at 09:28

score 1 · Answer 3 · answered Feb 16 '17 at 12:09

String stringToSearch = "Hello [To:admin1] Admin 1 , Good Morning [To:user2] Admin 1, GoodNight [To:user1] Admin 1";

Pattern p = Pattern.compile("To:[\\w]+");
Matcher m = p.matcher(stringToSearch);
StringBuffer sb = new StringBuffer();
while(m.find()){
    m.appendReplacement(sb,"To");
}
m.appendTail(sb);
System.out.println(sb.toString());

Java - How to regex this string?

3 Answers3