profane word regex match not working shi+ does not match properly

Question

String stre = "da shi+ jia";
profaneWord= "shi+";
boolean flag = isContain(stre, profaneWord);
private static boolean isContain(String source, String subItem) {
    String pattern = subItem;
    String pat = Pattern.quote(pattern);
    System.out.println("pattern quote example  " + pat);
    Pattern p = Pattern.compile("\b"+pat+"\b");
    System.out.println("pattern quote example  " + p.toString());
    Matcher m = p.matcher(source);
    return m.find();
}

pattern quote example \Qshi+\E pattern quote example \Qshi+\E false

Expected : true

I am using java 7 .

The `+` character is a special character. You need to escape it with a backslash: `\+` — AutomatedChaos, Jan 04 '19 at 07:13
not able to escape that throws a compile time error @AutomatedChaos - Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) — Robert Ravikumar, Jan 04 '19 at 07:29
https://bugs.openjdk.java.net/browse/JDK-8065538 similar one — Robert Ravikumar, Jan 04 '19 at 07:57

score 0 · Answer 1 · answered Jan 04 '19 at 06:29

0

Word boundary escape is \\b not \b.

Pattern.compile("\\b"+pat+"\\b");

answered Jan 04 '19 at 06:29

Leo Aso

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pattern quote example \Qshi+\E pattern quote example \b\Qshi+\E\b false ----> not working – Robert Ravikumar Jan 04 '19 at 06:34

profane word regex match not working shi+ does not match properly

1 Answers1