Check the jar file under OSX

The jar is a packaged file of Java class, we can package our own project as a jar file to run, or we can package it as a third-party package, sometimes we need to look at whether there is a class in a jar file and the corresponding package, we can use the following two ways:

① using the Software

Jd-gui is a cross-platform software that we can easily install on OSX and other systems, and then drag the jar file into the Jd-gui.

② using the Zip tool

The jar package is a zip file that we can extract directly after viewing, here is a simple example.

Yddemacbook-pro:tmp yd$ lsjfxrt.jaryddemacbook-pro:tmp yd$ unzip-x-Q Jfxrt.jar-  d jfxrtyddemacbook-pro:tmp YD$ LSJFXRT     jfxrt.jaryddemacbook-pro:tmp yd$ cd jfxrtyddemacbook-pro:jfxrt yd$ lsmeta-inf  MediaErrors_ Es.properties    mediaerrors_ja.properties    mediaerrors_sv.properties    Classes       Netscapemediaerrors.properties       mediaerrors_fr.properties    mediaerrors_ko.properties    MediaErrors_zh_ Cn.properties commediaerrors_de.properties    mediaerrors_it.properties    mediaerrors_pt_br.properties Mediaerrors_zh_tw.properties JAVAFXYDDEMACBOOK-PRO:JFXRT yd$

use Unzip to extract the jar file, showing the internal files, but this method is not easy to use Jd-gui.

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Check the jar file under OSX