CODEWITHSUNDEEP
javasplit
Nilanjan Saha
Nilanjan Saha

Reputation: 135

java Regular expression while splitting a string over parenthesis

I have a String like 

Move Selected Patients (38)

I want to retrieve 38 between the parenthesis using java split.

Tried with this code:

String a1 = "Move Selected Patients (38)";
String[] myStringArray = new String[2];
myStringArray = a1.split("(", 2);
System.out.println(myStringArray[0]);

and it fails with this exception:

java.util.regex.PatternSyntaxException: Unclosed group near index 1.

Can anyone please help me out.

Upvotes: 1

Views: 377

Answers (5)

Explosion Pills
Explosion Pills

Reputation: 191749

You need to escape the paren as the split argument is still a regular expression: \\(. Keep in mind that this will still return 38) as the second element. It would make more sense to use Matcher to capture the contents of the parentheses in a group: \\((.*?)\\)

Upvotes: 5

1218985
1218985

Reputation: 8012

You can easily achieve the requirement with regex as shown below:

String str = "Move Selected Patients (38)";
Pattern pattern = Pattern.compile("\\((\\d+)\\)");
Matcher match = pattern.matcher(str);
while(match.find()) {
    System.out.println(match.group(1));
}

Upvotes: 2

Fedor Skrynnikov
Fedor Skrynnikov

Reputation: 5609

Pattern p = Pattern.compile(".*\\(([0-9]*)\\)");
Matcher m = p.matcher("Move Selected Patients (38)");
String s = m.group(1);

If you need another part of the string as well, just use another group for it.

Upvotes: 2

Bhesh Gurung
Bhesh Gurung

Reputation: 51030

( is regex metacharacter, you have to escape it using \\. Try with \\(.

Upvotes: 1

user180100
user180100

Reputation:

( is a reserved char used for groups, you need to escape it with \

Upvotes: 1

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