Merge pull request #66 from heroku/malax/openjdk16

Add support for Java 16

buildpacks/jvm/CHANGELOG.md

@@ -3,6 +3,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+* Support for Java 16
 
 ## [0.1.4] 2021/02/23
 

buildpacks/jvm/lib/jvm.sh

@@ -17,6 +17,7 @@ DEFAULT_JDK_12_VERSION="12.0.2"
 DEFAULT_JDK_13_VERSION="13.0.6"
 DEFAULT_JDK_14_VERSION="14.0.2"
 DEFAULT_JDK_15_VERSION="15.0.2"
+DEFAULT_JDK_16_VERSION="16.0.0"
 
 if [[ -n "${JDK_BASE_URL}" ]]; then
 	# Support for setting JDK_BASE_URL had the issue that it has to contain the stack name. This makes it hard to
@@ -67,6 +68,8 @@ get_full_jdk_version() {
 		echo "$DEFAULT_JDK_14_VERSION"
 	elif [ "${jdkVersion}" = "15" ]; then
 		echo "$DEFAULT_JDK_15_VERSION"
+	elif [ "${jdkVersion}" = "16" ]; then
+		echo "$DEFAULT_JDK_16_VERSION"
 	elif [ "$(expr "${jdkVersion}" : '^1.[6-9]$')" != 0 ]; then
 		local minorJdkVersion
 		minorJdkVersion=$(expr "${jdkVersion}" : '1.\([6-9]\)')
@@ -87,7 +90,7 @@ get_jdk_url() {
 	jdkVersion="$(get_full_jdk_version "${shortJdkVersion}")"
 
 	local jdkUrl
-	if [ "$(expr "${jdkVersion}" : '^1[0-5]')" != 0 ]; then
+	if [ "$(expr "${jdkVersion}" : '^1[0-9]')" != 0 ]; then
 		jdkUrl="${JDK_BASE_URL}/openjdk${jdkVersion}.tar.gz"
 	elif [ "$(expr "${jdkVersion}" : '^1.[6-9]')" != 0 ]; then
 		jdkUrl="${JDK_BASE_URL}/openjdk${jdkVersion}.tar.gz"