A bash script to count the visibility modifiers in a jar file.

visibilities.sh

#!/bin/bash

if [ $# != 1 ]; then
  echo "Pass jar as sole argument"
  exit 1
fi

tmp=`mktemp -d`
unzip -d "$tmp" $1 1> /dev/null

classes=`find "$tmp" -name '*.class'`

api_javap=`echo "$classes" | \grep -v '.internal.' | xargs javap -p`

api_methods=`echo "$api_javap" | \grep -E "^  "`
api_methods_total=`echo "$api_methods" | wc -l`
api_methods_public=`echo "$api_methods" | \grep "  public" | wc -l`
api_methods_package=`echo "$api_methods" | \grep -E -v "  (public|private|protected)" | wc -l`
api_methods_protected=`echo "$api_methods" | \grep "  protected" | wc -l`
api_methods_private=`echo "$api_methods" | \grep "  private" | wc -l`

api_classes=`echo "$api_javap" | \grep -E ' (class|interface) '`
api_classes_total=`echo "$api_classes" | wc -l`
api_classes_public=`echo "$api_classes" | \grep "public" | wc -l`
api_classes_package=`echo "$api_classes" | \grep -E -v "(public|private|protected)" | wc -l`
api_classes_protected=`echo "$api_classes" | \grep "protected" | wc -l`
api_classes_private=`echo "$api_classes" | \grep "private" | wc -l`

internal_javap=`echo "$classes" | \grep '.internal.' | xargs javap -p`

internal_methods=`echo "$internal_javap" | \grep -E "^  "`
internal_methods_total=`echo "$internal_methods" | wc -l`
internal_methods_public=`echo "$internal_methods" | \grep "  public" | wc -l`
internal_methods_package=`echo "$internal_methods" | \grep -E -v "  (public|private|protected)" | wc -l`
internal_methods_protected=`echo "$internal_methods" | \grep "  protected" | wc -l`
internal_methods_private=`echo "$internal_methods" | \grep "  private" | wc -l`

internal_classes=`echo "$internal_javap" | \grep -E ' (class|interface) '`
internal_classes_total=`echo "$internal_classes" | wc -l`
internal_classes_public=`echo "$internal_classes" | \grep "public" | wc -l`
internal_classes_package=`echo "$internal_classes" | \grep -E -v "(public|private|protected)" | wc -l`
internal_classes_protected=`echo "$internal_classes" | \grep "protected" | wc -l`
internal_classes_private=`echo "$internal_classes" | \grep "private" | wc -l`

echo "
Public Packages
===============

             Methods   Classes
------------------------------
Public    : $api_methods_public $api_classes_public
Package   : $api_methods_package $api_classes_package
Protected : $api_methods_protected $api_classes_protected
Private   : $api_methods_private $api_classes_private
------------------------------
            $api_methods_total $api_classes_total


Internal Packages
=================

             Methods  Classes
-----------------------------
Public    : $internal_methods_public $internal_classes_public
Package   : $internal_methods_package $internal_classes_package
Protected : $internal_methods_protected $internal_classes_protected
Private   : $internal_methods_private $internal_classes_private
-----------------------------
            $internal_methods_total $internal_classes_total"

rm -r "$tmp"

zoutput.txt

$ ./visibilities.sh okhttp-3.0.0-RC1.jar

Public Packages
===============

             Methods   Classes
------------------------------
Public    :      618       46
Package   :      283       13
Protected :        2        0
Private   :      237        0
------------------------------
                1140       59


Internal Packages
=================

             Methods  Classes
-----------------------------
Public    :      559       49
Package   :      398       24
Protected :       13        0
Private   :      423        0
-----------------------------
                1393       73