add java-8

.github/workflows/smoke-java.yaml

@@ -1,4 +1,4 @@
-name: Smoke test "java" build
+name: Smoke test "java" and "java-8" build
 
 on: 
   workflow_dispatch:
@@ -8,6 +8,7 @@ on:
   pull_request:
     paths:
       - src/java/**
+      - src/java-8/**
       - .github/workflows/smoke-java.yaml
       - .github/actions/**
       - build/**
@@ -21,10 +22,18 @@ jobs:
       id: checkout
       uses: actions/checkout@v3
 
-    - name: Smoke test
+    - name: Smoke test java
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       id: smoke_test_java
       uses: ./.github/actions/smoke-test
       with:
         image: java
+
+    - name: Smoke test java-8
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      id: smoke_test_java_8
+      uses: ./.github/actions/smoke-test
+      with:
+        image: java-8

src/java-8/.devcontainer.json

@@ -0,0 +1,42 @@
+{
+	"name": "Java 8",
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
+	"features": {
+        "ghcr.io/devcontainers/features/java:1": {
+            "version": "8"
+        },
+        "ghcr.io/devcontainers/features/node:1": "none"
+    },
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": {
+				"java.import.gradle.java.home": "/usr/local/sdkman/candidates/java/current",
+				"java.configuration.runtimes": [
+					{
+						"default": true,
+						"name": "JavaSE-1.8",
+						"path": "/usr/local/sdkman/candidates/java/current"
+					}
+				]
+			},
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"vscjava.vscode-java-pack"
+			]
+		}
+	},
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "java -version",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}

src/java-8/.npmignore

@@ -0,0 +1,5 @@
+README.md
+test-project
+history
+manifest.json
+.npmignore

src/java-8/Dockerfile

@@ -0,0 +1,7 @@
+# [Choice] Debian OS version (use bullseye on local arm64/Apple Silicon): buster, bullseye
+ARG VARIANT="bullseye"
+FROM mcr.microsoft.com/devcontainers/base:${VARIANT}
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

src/java-8/README.md

@@ -0,0 +1,76 @@
+# Java 8
+
+## Summary
+
+*Develop Java applications. Includes the JDK 8 and Java extensions.*
+
+| Metadata | Value |  
+|----------|-------|
+| *Categories* | Core, Languages |
+| *Image type* | Dockerfile |
+| *Published images* | mcr.microsoft.com/devcontainers/java:8 |
+| *Available image variants* | 8 / 8-buster, 8-bullseye ([full list](https://mcr.microsoft.com/v2/devcontainers/java/tags/list)) |
+| *Published image architecture(s)* | x86-64, arm64/aarch64 for `bullseye` variant |
+| *Container host OS support* | Linux, macOS, Windows |
+| *Container OS* | Debian |
+| *Languages, platforms* | Java |
+
+See **[history](history)** for information on the contents of published images.
+
+## Using this image
+
+> **Note:** A version of this [image for **newer JDKs**](../java) is also available!
+
+You can directly reference pre-built versions of `Dockerfile` by using the `image` property in `.devcontainer.json` or updating the `FROM` statement in your own  `Dockerfile` to one of the following. An example `Dockerfile` is included in this repository.
+
+- `mcr.microsoft.com/devcontainers/java:8` (or `8-bullseye`, `8-buster` to pin to an OS version)
+
+You can decide how often you want updates by referencing a [semantic version](https://semver.org/) of each image. For example:
+
+- `mcr.microsoft.com/devcontainers/java:1-8` (or `1-8-bullseye`, `1-8-buster` to pin to an OS version)
+- `mcr.microsoft.com/devcontainers/java:1.0-8` (or `1.0-8-bullseye`, `1.0-8-buster` to pin to an OS version)
+- `mcr.microsoft.com/devcontainers/java:1.0.0-8` (or `1.0.0-8-bullseye`, `1.0.0-8-buster` to pin to an OS version)
+
+However, we only do security patching on the latest [non-breaking, in support](https://github.com/microsoft/vscode-dev-containers/issues/532) versions of images (e.g. `1-8`). You may want to run `apt-get update && apt-get upgrade` in your Dockerfile if you lock to a more specific version to at least pick up OS security updates.
+
+See [history](history) for information on the contents of each version and [here for a complete list of available tags](https://mcr.microsoft.com/v2/devcontainers/java/tags/list).
+
+Alternatively, you can use the contents of `Dockerfile` to fully customize your container's contents or to build it for a container host architecture not supported by the image.
+
+### Installing Maven or Gradle
+
+You can use the [Java Feature](https://github.com/devcontainers/features/tree/main/src/java) to install `maven` and `gradle` in `.devcontainer.json`:
+
+```json
+{
+  "features": {
+     "ghcr.io/devcontainers/features/java:1": {
+        "version": "none",
+        "installGradle": "true",
+        "installMaven": "true"
+    }
+  }
+}
+```
+
+### Installing Node.js
+
+Given JavaScript front-end web client code written for use in conjunction with a Java back-end often requires the use of Node.js-based utilities to build, this container also includes `nvm` so that you can easily install Node.js.
+
+Also, you can use a [Node Feature](https://github.com/devcontainers/features/tree/main/src/node) to install any version of Node by adding the following to `.devcontainer.json`:
+
+```json
+{
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "latest"
+    }
+  }
+}
+```
+
+## License
+
+Copyright (c) Microsoft Corporation. All rights reserved.
+
+Licensed under the MIT License. See [LICENSE](https://github.com/devcontainers/images/blob/main/LICENSE).

src/java-8/manifest.json

@@ -0,0 +1,61 @@
+{
+	"version": "1.0.0",
+	"variants": [
+		"bullseye",
+		"buster"
+	],
+	"build": {
+		"latest": false,
+		"rootDistro": "debian",
+		"architectures": {
+			"bullseye": [
+				"linux/amd64",
+				"linux/arm64"
+			],
+			"buster": [
+				"linux/amd64"
+			]
+		},
+		"tags": [
+			"java:${VERSION}-8-${VARIANT}"
+		],
+		"variantTags": {
+			"buster": [
+				"java:${VERSION}-8",
+				"java:${VERSION}-8-jdk-buster"
+			],
+			"bullseye": [
+				"java:${VERSION}-8-jdk-bullseye"
+			]
+		}
+	},
+	"dependencies": {
+		"image": "buildpack-deps:${BASE_IMAGE_VERSION_CODENAME}-curl",
+		"imageLink": "https://hub.docker.com/_/buildpack-deps",
+		"apt": [
+			{
+				"cgIgnore": false,
+				"name": "yarn"
+			}
+		],
+		"git": {
+			"Oh My Zsh!": "/home/vscode/.oh-my-zsh",
+			"nvm": "/usr/local/share/nvm"
+		},
+		"other": {
+			"SDKMAN!": null,
+			"Eclipse Temurin": {
+				"markdownIgnore": true,
+				"versionCommand": "/usr/local/sdkman/candidates/java/current/bin/java -version 2>&1 | grep -ozP '^openjdk\\sversion\\s\\\"\\K[^\\\"]+' | tr '\\0' '\\n'",
+				"downloadUrl": "https://adoptium.net/"
+			}
+		},
+		"languages": {
+			"Java": {
+				"cgIgnore": true,
+				"versionCommand": "/usr/local/sdkman/candidates/java/current/bin/java -version 2>&1 | grep -ozP '^openjdk\\sversion\\s\\\"\\K[^\\\"]+' | tr '\\0' '\\n' && /usr/local/openjdk-*/bin/java --version | grep -ozP 'openjdk\\s+\\K[0-9]+\\.[0-9]+\\.[0-9]+' | tr '\\0' '\\n'",
+				"path": "/usr/local/sdkman/candidates/java/current<br />/usr/local"
+			}
+		}
+	}
+}

src/java-8/test-project/.classpath

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="target/generated-sources/annotations">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="ignore_optional_problems" value="true"/>
+			<attribute name="m2e-apt" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="target/generated-test-sources/test-annotations">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="ignore_optional_problems" value="true"/>
+			<attribute name="m2e-apt" value="true"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

src/java-8/test-project/.gitignore

@@ -0,0 +1 @@
+target

src/java-8/test-project/.project

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>my-app</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

src/java-8/test-project/.settings/org.eclipse.jdt.apt.core.prefs

@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.apt.aptEnabled=false

src/java-8/test-project/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,9 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=ignore
+org.eclipse.jdt.core.compiler.processAnnotations=disabled
+org.eclipse.jdt.core.compiler.release=disabled
+org.eclipse.jdt.core.compiler.source=1.8

src/java-8/test-project/.settings/org.eclipse.m2e.core.prefs

@@ -0,0 +1,4 @@
+activeProfiles=
+eclipse.preferences.version=1
+resolveWorkspaceProjects=true
+version=1

src/java-8/test-project/pom.xml

@@ -0,0 +1,56 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.mycompany.app</groupId>
+  <artifactId>my-app</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <name>my-app</name>
+  <url>http://maven.apache.org</url>
+
+  <properties>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement>
+      <plugins>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>3.0.0-M3</version>
+        </plugin>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+          <configuration>
+            <source>8</source>
+            <target>8</target>
+          </configuration>
+        </plugin>
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-jar-plugin</artifactId>
+          <configuration>
+            <archive>
+              <manifest>
+                <mainClass>com.mycompany.app.App</mainClass>
+              </manifest>
+            </archive>
+          </configuration>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>

src/java-8/test-project/src/main/java/com/mycompany/app/App.java

@@ -0,0 +1,17 @@
+/*-------------------------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+ *-------------------------------------------------------------------------------------------------------------*/
+
+package com.mycompany.app;
+
+import static javax.xml.XMLConstants.XML_NS_PREFIX;
+
+public class App 
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Hello Remote World!" );
+        System.out.println("The XML namespace prefix is: " + XML_NS_PREFIX);
+    }
+}