java - How to replace all non-digit charaters in a string? -

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i need replace non-digit charaters in string. instance:

string: 987sdf09870987=-0\\\`42 replaced: 987**sdf**09870987**=-**0**\\\`**42

that's non-digit char-sequence wrapped ** charaters. how can string::replaceall()?

(?![0-9]+$).*

the regex doesn't match want. how can that?

(\\d+)

you can use , replace **$1**.see demo.

https://regex101.com/r/fm9ly3/2


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