There is also the locate command. When combined with grep, they make a fast way to find files and search within them. For example, to find a Java class anywhere

There is also the locate command. When combined with grep, they make a fast way to find files and search within them. For example, to find a Java class anywhere on the system: sudo updatedb for i in $(locate "*.jar"); do echo $i; jar -tvf $i | grep -Hsi classname; done The best you can do with vanilla Windows is search from the root directory, but it could take a while: for /R %G in (*.jar) do @jar -tvf %G | find "ClassName" > NUL && echo %G