Auto-recreate Java links for latest versions. Windows, Cygwin as admin

java-update-links.sh

#!/bin/bash

makeLink() {
	SOURCE="$1"
	TARGET="$2"
	[ -d "${TARGET}" ] && return
	ls -d "${SOURCE}"* &>/dev/null || return
	cmd /c mklink /d "${TARGET}" $(ls -d "${SOURCE}"* 2>/dev/null | sort -V | tail -n 1 | sed 's/\//\\/g')
}

makeLinkLatest() {
	SOURCE="$1"
	TARGET="$1"
	[ -d "${TARGET}" ] && return
	if ls -d "${SOURCE}"? &>/dev/null ; then
		cmd /c mklink /d "${TARGET}" $(ls -d "${SOURCE}"* 2>/dev/null | sort -V | tail -n 1 | sed 's/\//\\/g')
	fi
}

doLinks() {
	echo -n "dir: " ; pwd
	rm -f jdk jdk? jdk?? jre jre? jre?? &>/dev/null
	# AdoptOpenJDK
	for VERSION in `seq 8 20` ; do
		makeLink "../AdoptOpenJDK/jdk-${VERSION}" "jdk${VERSION}"
		makeLink "../AdoptOpenJDK/jre-${VERSION}" "jre${VERSION}"
	done
	# Oracle
	makeLink "jdk1.7" "jdk7"
	makeLink "jdk1.8" "jdk8"
	makeLink "jre1.7" "jre7"
	makeLink "jre1.8" "jre8"
	# General
	makeLinkLatest "jdk"
	makeLinkLatest "jre"
}

cd "/cygdrive/c/Program Files/Java" && doLinks
cd "/cygdrive/c/Program Files (x86)/Java" && doLinks