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Asked: May 15, 20262026-05-15T02:37:42+00:00 2026-05-15T02:37:42+00:00

I have this regexp Pattern pattern = Pattern.compile(\\{([^\\}]+)\\}); to match {a1|a2|a3} and {a4} format

I have this regexp

Pattern pattern = Pattern.compile("\\{([^\\}]+)\\}");

to match {a1|a2|a3} and {a4} format

How can I rewrite the above line, to include those matches only when a pipe | is present, so to match {a1|a2|a3} and do not match on {a4}

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