If you have 64 bit Java installed but can still only allocate 1GB of RAM, on windows 7 but now i format my pc and got windows 10 and i run into this
xameluj.pdf
Hardware requirements • PC or Mac (not tablet or Chromebook) • Windows 10, 8, or 7, or Vista, or Mac OS10 8 or higher, 64-bit (after 2008), Note: Mac
systemrecommendations.pdf
Linux ® is the registered trademark of Linus Torvalds in the United States and other countries Java ® is a registered trademark of Oracle and/or its affiliates
OpenJDK-8-Installing_and_using_OpenJDK_8_for_Windows-en-US.pdf