Initial attempt at Java support

.codecov.yaml

@@ -18,6 +18,10 @@ component_management:
       name: C#
       paths:
         - csharp/**
+    - component_id: module_java
+      name: Java
+      paths:
+        - java/**
     - component_id: module_javascript
       name: JavaScript
       paths:

.github/workflows/codeql.yml

@@ -21,6 +21,7 @@ on:
       - 'c/**'
       - 'cplusplus/**'
       - 'csharp/**'
+      - 'java/**'
       - 'javascript/**'
       - 'python/**'
       - '!*/README.rst'
@@ -60,6 +61,9 @@ jobs:
         - name: csharp
           language: csharp
           build-mode: none
+        - name: java
+          language: java-kotlin
+          build-mode: none
         - name: javascript
           language: javascript-typescript
           build-mode: none

.github/workflows/java-lint.yml

@@ -0,0 +1,44 @@
+name: Java Lint
+
+on:
+  push:
+    paths:
+      - 'java/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Set up Git
+      run: git config --global user.email "[email protected]" && git config --global user.name "GitHub Actions"
+
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up Java
+      uses: actions/setup-java@v3
+      with:
+        java-version: '21'
+        distribution: 'adopt'
+
+    - name: Build with Maven
+      run: make ja_dependencies
+
+    - name: Run linter
+      run: make ja_lint
+
+    - name: Check for differences
+      run: |
+        # Get the diff from the last commit to the current working tree
+        if [ -n "$(git diff HEAD)" ]; then
+          echo "There are changes detected:"
+          git diff HEAD
+          exit 1
+        else
+          echo "No changes detected."
+        fi

.github/workflows/java.yml

@@ -0,0 +1,47 @@
+name: Java
+
+on:
+  push:
+    paths:
+      - 'java/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ['ubuntu-latest']
+        java-version: [8, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21]
+        include:
+          - os: windows-latest
+            java-version: 21
+          - os: macos-latest
+            java-version: 21
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up Java
+      uses: actions/setup-java@v3
+      with:
+        java-version: ${{ matrix.java-version }}
+        distribution: 'adopt'
+
+    - name: Build with Maven
+      run: make ja_dependencies
+
+    - name: Run tests
+      run: make ja_test
+
+    - name: Upload code coverage to Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        flags: Java

.github/workflows/pages.yml

@@ -10,6 +10,7 @@ on:
       - '**/*.cpp'
       - '**/*.cs'
       - '**/*.h'
+      - '**/*.java'
       - '**/*.js'
       - '**/*.py'
       - '**/*.rs'

Makefile

@@ -23,9 +23,9 @@ help:
 	@echo
 	@echo "The following jobs are available under the cs_ prefix"
 	@$(MAKE) cs_help $(MFLAGS) --no-print-directory
-#	@echo
-#	@echo "The following jobs are available under the ja_ prefix"
-#	@$(MAKE) ja_help $(MFLAGS) --no-print-directory
+	@echo
+	@echo "The following jobs are available under the ja_ prefix"
+	@$(MAKE) ja_help $(MFLAGS) --no-print-directory
 	@echo
 	@echo "The following jobs are available under the js_ prefix"
 	@$(MAKE) js_help $(MFLAGS) --no-print-directory
@@ -54,8 +54,8 @@ c_%:
 docs_%:
 	@cd docs && $(MAKE) $* $(MFLAGS)
 
-# ja_%:
-# 	@cd java && $(MAKE) $* $(MFLAGS)
+ja_%:
+	@cd java && $(MAKE) $* $(MFLAGS)
 
 js_%:
 	@cd javascript && $(MAKE) $* $(MFLAGS)

README.rst

@@ -13,6 +13,10 @@ Olivia's Project Euler Solutions
    :target: https://github.com/LivInTheLookingGlass/Euler/actions/workflows/csharp.yml
 .. |C#-lint| image:: https://img.shields.io/github/actions/workflow/status/LivInTheLookingGlass/Euler/csharp-lint.yml?logo=github&label=Linting
    :target: https://github.com/LivInTheLookingGlass/Euler/actions/workflows/csharp-lint.yml
+.. |Javai| image:: https://img.shields.io/github/actions/workflow/status/LivInTheLookingGlass/Euler/java.yml?logo=github&label=Java%20Tests
+   :target: https://github.com/LivInTheLookingGlass/Euler/actions/workflows/java.yml
+.. |Java-lint| image:: https://img.shields.io/github/actions/workflow/status/LivInTheLookingGlass/Euler/java-lint.yml?logo=github&label=Linting
+   :target: https://github.com/LivInTheLookingGlass/Euler/actions/workflows/java-lint.yml
 .. |JavaScript| image:: https://img.shields.io/github/actions/workflow/status/LivInTheLookingGlass/Euler/javascript.yml?logo=github&label=Js%20Tests
    :target: https://github.com/LivInTheLookingGlass/Euler/actions/workflows/javascript.yml
 .. |ESLint| image:: https://img.shields.io/github/actions/workflow/status/LivInTheLookingGlass/Euler/eslint.yml?logo=github&label=ESLint
@@ -33,6 +37,8 @@ Olivia's Project Euler Solutions
    :target: https://app.codecov.io/github/LivInTheLookingGlass/Euler?flags%5B0%5D=Cpp
 .. |Cs-Cov| image:: https://img.shields.io/codecov/c/github/LivInTheLookingGlass/Euler?flag=Csharp&logo=codecov&label=C%23%20Cov
    :target: https://app.codecov.io/github/LivInTheLookingGlass/Euler?flags%5B0%5D=Csharp
+.. |Ja-Cov| image:: https://img.shields.io/codecov/c/github/LivInTheLookingGlass/Euler?flag=Java&logo=codecov&label=Java%20Cov
+   :target: https://app.codecov.io/github/LivInTheLookingGlass/Euler?flags%5B0%5D=Java
 .. |Js-Cov| image:: https://img.shields.io/codecov/c/github/LivInTheLookingGlass/Euler?flag=JavaScript&logo=codecov&label=Js%20Cov
    :target: https://app.codecov.io/github/LivInTheLookingGlass/Euler?flags%5B0%5D=JavaScript
 .. |Py-Cov| image:: https://img.shields.io/codecov/c/github/LivInTheLookingGlass/Euler?flag=Python&logo=codecov&label=Py%20Cov
@@ -67,6 +73,11 @@ Olivia's Project Euler Solutions
 |            |                          |        | |CodeQL| |br|     |
 |            |                          |        | |C#-lint|         |
 +------------+--------------------------+--------+-------------------+
+| Java       | Java 8+                  |  2     | |Javai| |br|      |
+|            |                          |        | |Ja-Cov| |br|     |
+|            |                          |        | |CodeQL| |br|     |
+|            |                          |        | |Java-lint|       |
++------------+--------------------------+--------+-------------------+
 | JavaScript | Node 12+ |br|            | 20     | |JavaScript| |br| |
 |            | Bun 1.0+ |br|            |        | |Js-Cov| |br|     |
 |            | Firefox [2]_ |br|        |        | |CodeQL| |br|     |
@@ -124,21 +135,11 @@ Makefile will direct recipes using prefixes
 -  ``make cp_*`` will go to the csharp Makefile
 -  ``make cs_*`` will go to the csharp Makefile
 -  ``make docs_*`` will go to the docs Makefile
+-  ``make ja_*`` will go to the java Makefile
 -  ``make js_*`` will go to the javascript Makefile
 -  ``make py_*`` will go to the python Makefile
 -  ``make rs_*`` will go to the rust Makefile
 -  Any make recipes supported by Sphinx will be redirected to the docs Makefile
 -  All other recipes will be run for all languages
 
 For more information, please see the README documents in each section.
-
-Roadmap
--------
-
-1. Make sure no language is below Makefile in code percentage
-2. For each language in: Ruby, ...
-  a. Create a new section
-  b. Make stubs for test code
-  c. Write minimal documentation
-  d. Port problems 1-n, until higher than Makefile percentage
-  e. Repeat step 1

docs/conf.py

@@ -208,3 +208,15 @@ def setup(app):
         }
     ))
 
+    app.add_domain(custom_domain(
+        'JavaDomain',
+        'java',
+        'Java',
+        {
+            'class': {
+            },
+            'method': {
+            },
+        }
+    ))
+

docs/csharp.rst

@@ -5,8 +5,8 @@ Euler C# Implementation
     :start-line: 2
     :end-before: Makefile
 
-.. include:: ../rust/README.rst
-    :start-after: Alias for ``cargo clean``
+.. include:: ../csharp/README.rst
+    :start-after: dependencies for this section.
     :end-before: Problems Solved
 
 Usage