Passing of an array from Java into a Perl is generally done in the form of a scalar reference. There are many other ways but I would prefer scalar reference. Also you need to use the GetIntArrayElements -- which is a jni function which is used to convert the scalar into an array of integers.

For example:

public class arrayforPerl {
  perl void max( int[] data ) {{
        # Get the array elements
        #
        my @arrPerl = GetIntArrayElements( $data );        
        my @arrMax = sort {$a <=> $b} @arrPerl;
        print "Max: $arrMax[$#arrMax]\n";
    }} ## double braces are for the perl code

    void maxProg() {
        int[] data = {101, 99, 42, 666, 23};
        max( data );
    }

    public static void main(String[] argv) {
        arrayforPerl javaPerl = new arrayforPerl();
        javaPerl.maxProg();
    }
}
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I hope you can build on this