Try Unicode Character 'ZERO WIDTH SPACE' (U+200B). It is not a Whitespace according to WP: Whitespace#Unicode. The code of StringUtils. ... <看更多>

In computer science, whitespace is any character or series of whitespace characters that represent horizontal ... ... <看更多>

To represent a space bar of a keyboard, U+23B5 Bottom Square Bracket (normal ⎵ bold ⎵ monospace ⎵ ). As alternative, U+2423 Open Box (␣). In HTML parlace, & ... ... <看更多>