CODEWITHSUNDEEP
javaregex
KiralyCraft
KiralyCraft

Reputation: 119

Java split string by regex

I need to split a string in java with a regex, but i'm not quite sure how to. I have to split 

[Caps][RCaps]C[Caps][RCaps]atalog[Caps][RCaps]

By the words inside the square brackets. I somehow need to get all the parts of the string.

Expected output:

[Caps]
[RCaps]
C
[Caps]
[RCaps]
atalog
[Caps]
[RCaps]

And the text inside the square brackets could be whatever. In this case, it is "Caps" and "RCaps" but it could also be "Potato" for example

Upvotes: 0

Views: 285

Answers (4)

TechnoCrat
TechnoCrat

Reputation: 708

try this.

 String string = "[Caps][RCaps]C[Caps][RCaps]atalog[Caps][RCaps]";
        String[] split = string.split("\\]");
        for (String string1 : split) {
            if (string1.charAt(0) != '[') {
                int indexOf = string1.indexOf("[");
                String substring = string1.substring(0, indexOf);
                String substring1 = string1.substring(indexOf, string1.length()) + "]";
                System.out.println(substring);
                System.out.println(substring1);
            } else {
                System.out.println(string1 + "]");
            }
        }

Upvotes: 1

Ankur Shanbhag
Ankur Shanbhag

Reputation: 7804

"[" or "]" are regex matching characters called meta-characters. You need to add escape char before it. \\[ or \\]

You need to try something like this:

String str = "[Caps][RCaps]C[Caps][RCaps]atalog[Caps][RCaps]";
Pattern pattern = Pattern.compile("\\[?(\\w)+\\]?");
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {
    System.out.print(matcher.group());
}

Output:

[Caps] [RCaps] C [Caps] [RCaps] atalog [Caps] [RCaps]

Upvotes: 1

alpha bravo
alpha bravo

Reputation: 7948

instead of split, you could use this pattern to capture what you want 

(\[[^][]*\]|[^][]+)

Demo

Upvotes: 1

Keppil
Keppil

Reputation: 46209

What you need to do is to split both before a [ character and after a ] character, This translates into the regex (?=\\[)|(?<=\\]).

Example: 

String string = "[Caps][RCaps]C[Caps][RCaps]atalog[Caps][RCaps]";
String[] result = string.split("(?=\\[)|(?<=\\])");
System.out.println(Arrays.toString(result));

This prints:

[[Caps], [RCaps], C, [Caps], [RCaps], atalog, [Caps], [RCaps]]

Upvotes: 3

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