When downloading from the oracle site you need to specify the licence acceptance in the header.

wget /
--header "Cookie: oraclelicense=accept-securebackup-cookie" /
http://download.oracle.com/otn-pub/java/jdk/10.0.2+13/19aef61b38124481863b1413dce1855f/serverjre-10.0.2_linux-x64_bin.tar.gz

1. Heap