Install Java 6 legacy using this link : https://support.apple.com/kb/DL1572?locale=en_US

java6_legacy_install.scpt

set theDMG to choose file with prompt "Please select javaforosx.dmg:" of type {"dmg"}
do shell script "hdiutil mount " & quoted form of POSIX path of theDMG
do shell script "pkgutil --expand \"/Volumes/Java for macOS 2017-001/JavaForOSX.pkg\" ~/tmp"
do shell script "hdiutil unmount \"/Volumes/Java for macOS 2017-001/\""
do shell script "sed -i '' 's/return false/return true/g' ~/tmp/Distribution"
do shell script "pkgutil --flatten ~/tmp ~/Desktop/Java.pkg"
do shell script "rm -rf ~/tmp"
display dialog "Modified Java.pkg saved on desktop" buttons {"Ok"}