package sun-java6-doc 6-13-1 failed to install/upgrade: subprocess post-installation script returned error exit status 1

[Sardorbek Pulatov]

I just wanted to install sun-java6-doc package from Synaptic, when it tried to install it writes me

This package is an installer package, it does not actually contain the
JDK documentation. You will need to go download one of the
archives:

    jdk-6u10-docs.zip jdk-6u10-docs-ja.zip

(choose the non-update version if this is the first installation).
Please visit

    http://java.sun.com/javase/downloads/

now and download. The file should be owned by root.root and be copied
to /tmp.

[Press RETURN to try again, 'no' + RETURN to abort]

ProblemType: Package
Architecture: i386
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 unzip 5.52-12ubuntu1
 findutils 4.4.0-2ubuntu4
 libc6 2.9-4ubuntu6
DistroRelease: Ubuntu 9.04
ErrorMessage: subprocess post-installation script returned error exit status 1
Package: sun-java6-doc 6-13-1
PackageArchitecture: all
SourcePackage: sun-java6
Title: package sun-java6-doc 6-13-1 failed to install/upgrade: subprocess post-installation script returned error exit status 1
Uname: Linux 2.6.30-020630-generic i686