java - 如何在正则表达式中匹配“任何字符”？(How to match “any character” in regular expression?)

Question

The following should be matched:

(以下应匹配：)

AAA123
ABCDEFGH123
XXXX123

can I do: ".*123" ?

(我可以这样做： ".*123"吗？)

  ask by Saobi translate from so

Answer 1

Yes, you can.

(是的你可以。)

That should work.

(那应该工作。)

• . = any char

  (=任何字符)

• \. = the actual dot character

  (=实际的点字符)

• .? = .{0,1} = match any char zero or one times

  (= .{0,1} =匹配任何字符0或1)

• .* = .{0,} = match any char zero or more times

  (.* = .{0,} =匹配任何字符零次或多次)

• .+ = .{1,} = match any char one or more times

  (.+ = .{1,} =匹配任何字符一次或多次)