Karanam Krishna Karanam Krishna - 1 year ago 61
Java Question

How to get exact match of & in the given string


"True && False & True"

In the above string I am trying to match if only
is present and not looking for consecutive characters (

I mean
should not be matched but It should match only
if it is available in the string.

In the aforementioned case I should get only 1 match since its available.

I am looking for a regular expression.

Tried Options:


I believe by using length of string and finding the first occurrence of
and counting the same will give the result.

But still looking for a better answer in form of regular expressions.

Answer Source

You can use negative lookahead and lookbehind:


This means "An & not preceded or followed by another &"

Sample Java code :

public static void main(String[] args) {
    String s = "True && False & True but & is & right?";
    Pattern p = Pattern.compile("(?<!&)&(?!&)");
    Matcher m = p.matcher(s);
    while (m.find()) {
    // can keep counter and add +1 here


O/P :

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