Regular Expressions in java trying to match a string in specific format (format consists of | sysbol)

Question

Regular Expressions in java

String s1="Anil-anilorg|anotherorg";
String s2="Anil-anilorg|";

I want to find weather s2 is present or sub-string of s1 by using regular expressions, but while I am doing that it is considering this symbol "|" as logical OR I am using hbaseStringRegexComparator to compare

score 3 · Accepted Answer · edited Dec 07 '17 at 15:58

3

You need to escape the | as \|, and within a String it becomes "\\|".

edited Dec 07 '17 at 15:58

Pshemo

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answered Dec 07 '17 at 15:41

Jonathan Rosenne

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can you please explain me why do it need two back \\? – app Dec 07 '17 at 15:47
Within a string literal the backslash is the escape symbol. A single backslash will escape the logical or symbol and the regex will consequently contain just it. A double backslash will escape the backslash so the regex with contain \| as required. – Jonathan Rosenne Dec 07 '17 at 15:50
Thank you it worked – app Dec 07 '17 at 15:53

score 1 · Answer 2 · answered Dec 07 '17 at 15:48

1

You can use String.contains method. No regex needed:

    String s1="Anil-anilorg|anotherorg"; 
    String s2="Anil-anilorg|"; 
    System.out.println(s1.contains(s2));

answered Dec 07 '17 at 15:48

Eritrean

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Regular Expressions in java trying to match a string in specific format (format consists of | sysbol)

2 Answers2