java regex tester online

### online regex testers

here are a few popular online regex testers that support java regex syntax:

### basic regex syntax

before we dive into examples, let's cover some basic regex syntax that you can use in your java regex:

- `.` : matches any character except a newline.
- `*` : matches 0 or more occurrences of the preceding element.
- `+` : matches 1 or more occurrences of the preceding element.
- `?` : matches 0 or 1 occurrence of the preceding element.
- `^` : anchors the match to the start of the string.
- `$` : anchors the match to the end of the string.
- `[]` : matches any one of the characters inside the brackets.
- `|` : acts as a logical or.
- `()` : groups parts of the regex.

### example: validating email addresses

let's create a simple java program that uses regex to validate an email address. we will then test the regex pattern using an online tester.

#### step 1: java code example

here’s a java code snippet that uses regex to validate email addresses:

#### step 2: explanation of the regex

the regex pattern `^[a-za-z0-9._%+-]+@[a-za-z0-9.-]+\\.[a-za-z]{2,6}$` can be broken down as follows:

- `^` : start of the string.
- `[a-za-z0-9._%+-]+` : matches one or more letters, digits, or special characters (._%+-).
- `@` : matches the "@" symbol.
- `[a-za-z0-9.-]+` : matches one or more letters, digits, dots, or hyphens (the domain part).
- `\\.` : matches a literal dot (the dot is escaped because it has a special mea ...

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