This script will download the latest Offline JRE installer for Windows x86 and x64.

Get-LatestJRE.ps1

<# Get-LatestJRE.ps1

Reference:
http://servertechs.info/automating-java-download-and-deployment-with-powershell-and-sccm/

#>

# First I need to obtain some Uri's from Oracle. I'll sort them out, grabbing only the Windows Offline links
$Links = $(Invoke-WebRequest 'http://www.java.com/en/download/manual.jsp' -UserAgent 'Mozilla/5.0 (Windows NT 6.1; wow64)').links | 
    Where-Object -Property innerHTML -like 'Windows Offline*' | 
        Select-Object -Property href, innerHTML

# here I take each link and download the latest jre installer
Foreach ($Link in $Links) {
    $file = $Link.innerHTML
    Invoke-WebRequest -Uri $Link.href -OutFile $env:HOMEPATH\Downloads\jre_"$file"_.exe
}