why use the lib ,can't compress the png size.

[FzuLiWei]

I execute this javacode ,but give me the same size file

[eustas]

This library implements only Zopfli compression algorithm, not ZopfilPNG application.
PNG internally is already compressed with DEFLATE. Compressing already compressed or encrypted data rarely gives good results.

I hope, some day I will implement ZopfliPNG in Java,...