Javascript Regex to Java regex

Question

I have the following regex in Javascript:

/^(\{?(08)([3-9]){1}-([0-9]){7,7}\}?)$/

It matches numbers like:

087-1234893, 083-2839283, 086-4283944, etc.

I've converted it to Java (Android) as follows:

public boolean isValidMobilePhone(String phone){
        boolean returnObj=false;
        Pattern p = Pattern.compile("^({?(08)([3-9]){1}-([0-9]){7,7}}?)$");
        Matcher m = p.matcher(phone);
        boolean matchFound = m.matches();
        if (matchFound){
            returnObj=true;
        }
        return returnObj;
    }

Here is the error I get:

07-12 23:26:10.478: ERROR/AndroidRuntime(11464): java.util.regex.PatternSyntaxException: Syntax error U_REGEX_RULE_SYNTAX near index 3: 07-12 23:26:10.478: ERROR/AndroidRuntime(11464): ^({?(08)([3-9]){1}-([0-9]){7,7}}?)$ 07-12 23:26:10.478: ERROR/AndroidRuntime(11464): ^ 07-12 23:26:10.478: ERROR/AndroidRuntime(11464): at com.ibm.icu4jni.regex.NativeRegEx.open(Native Method)

I can't figure out what's wrong with the third '?' character! I tried escaping it with '\', but that won't compile.

Can anyone please help me?

Hari Ram · Accepted Answer · 2019-11-14 06:11:36Z

1

Use this:

Pattern.compile("^08[3-9]-([0-9]){7}$");

Or even:

Pattern.compile("08[3-9]-([0-9]){7}");

edited Nov 14, 2019 at 6:11

Hari Ram

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answered Jul 12, 2011 at 23:17

Martin

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1 Comment

Martin Over a year ago

No problem. You might want to get a regular expression cheat sheet next time you work with regular expressions. Also try using baregrep.

Håvard · Accepted Answer · 2011-07-12 22:41:26Z

1

Escape the {, and most likely the } near the end as well.

Pattern p = Pattern.compile("^(\\{?(08)([3-9]){1}-([0-9]){7,7}\\}?)$");

The { character is a special character used to repeat (e.g. a{3,5} repeats a 3-5 times), and needs to be escaped in Java regexes.

edited Jul 12, 2011 at 22:41

answered Jul 12, 2011 at 22:33

Håvard

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2 Comments

Felix Kling Over a year ago

You need two \ to escape it. To be fair, some regex engines take the {} literally if the are not used in this {n,n} format.

Eamorr Over a year ago

Sorry, I fell asleep! I'm in work now, but will be back to it later... I'll report back then

The Mask · Accepted Answer · 2011-07-12 22:51:20Z

0

need only remove the delimiters

for javascript:

var  pattern = /^(\{?(08)([3-9]){1}-([0-9]){7,7}\}?)$/;

for Java:

string pattern = "^(\{?(08)([3-9]){1}-([0-9]){7,7}\}?)$";

answered Jul 12, 2011 at 22:51

The Mask

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1 Comment

Eamorr Over a year ago

Hi, when I use that pattern, I get this error: Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )

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