The following table lists all the quantifiers available in Java regular expressions:
| Quantifier | Meaning |
| m* | Match m zero or more times |
| m+ | Match m one or more times |
| m? | Match m one or zero times (also called an optional match) |
| m{X} | Match m exactly X times |
| m{X,} | Match m X or more times |
| m{X,Y} | Match m at least X and at most Y times |
In all the aforementioned cases, m can be a single character or a group of characters. We will discuss grouping in more detail later.
