📅 最后修改于: 2020-11-14 10:20:10 🧑 作者: Mango
以下是在Java中使用正则表达式匹配预定义字符类的各种示例。
| Sr.No | Construct & Matches |
|---|---|
| 1 | .
Any character (may or may not match line terminators). |
| 2 | \d
A digit: [0-9]. |
| 3 | \D
A non-digit: [^0-9]. |
| 4 | \s
A whitespace character: [ \t\n\x0B\f\r] |
| 5 | \S
A non-whitespace character: [^\s]. |
| 6 | \w
A word character: [a-zA-Z_0-9]. |
| 7 | \W
A non-word character: [^\w] |