Regular Expressions 101

Positive Lookbehind(?<=appName-)

appName-the literal text appName- (case sensitive)

.*?any character (except for line terminators), repeated any number of times

Positive Lookahead(?=\.jar$)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

jarthe literal text jar (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=appName-).*?(?=\.jar$)

New

/opt/appName/someappName-2.0.0-000.jar
/opt/appName/appName-1.0.0-TTT-aa444.jar
/opt/appName/appName-1.0.0-rrr1115.jar