Regex: Accept digits and atleast 1 star

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String should contain digits and atleast one asterisk. Please help me with the regex.

System.out.println(Pattern.matches("\\d", "12345678*")); //true
System.out.println(Pattern.matches("\\d", "1234****")); //true
System.out.println(Pattern.matches("\\d", "123456789")); //false
System.out.println(Pattern.matches("\\d", "abc45678*")); //false

what should be the correct regex pattern ? I tried different patterns like [0-9](?=.*_). but no luck.

Thank you!

validation regex java
1 Answers

You can use

.matches("\\d+\\*+", "123456789")

Here, the regex matches the whole string that starts with one or more digits and one or more asterisks after these digits.

See the regex demo.

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