Stage 0: Add Java fundamentals exercises

examples/build.gradle

@@ -16,7 +16,7 @@ spotless {
     java {
         target fileTree(rootDir) {
             include "**/*.java"
-            exclude "**/build/**", "**/.gradle/**", "stage0/snippets/**", "stage1/snippets/**"
+            exclude "**/build/**", "**/.gradle/**", "stage0/snippets/**", "stage0/templates/**", "stage0/solutions/**", "stage1/snippets/**"
         }
         licenseHeaderFile rootProject.file('gradle/LICENSE_HEADER')
     }

examples/stage0/solutions/.gitignore

@@ -0,0 +1 @@
+/build/

examples/stage0/solutions/build.gradle

@@ -0,0 +1,47 @@
+plugins {
+    id 'java'
+    id "com.diffplug.spotless" version "8.0.0"
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_25
+    targetCompatibility = JavaVersion.VERSION_25
+}
+
+sourceSets {
+    main {
+        java {
+            setSrcDirs(['src'])
+        }
+    }
+}
+
+def solutionFiles = fileTree('src') { include '**/*.java' }.files
+def runnableFiles = solutionFiles.findAll { it.text.contains('void main(') }
+def solutionRunTasks = runnableFiles.collect { src ->
+    def className = src.name - '.java'
+    tasks.register("run${className}", JavaExec) {
+        dependsOn 'compileJava'
+        classpath = sourceSets.main.output
+        mainClass = className
+    }
+}
+
+tasks.register('runSolutions') {
+    dependsOn solutionRunTasks
+}
+
+spotless {
+    java {
+        target fileTree('.') { include '**/*.java' }
+        licenseHeaderFile(rootProject.file('../../gradle/LICENSE_HEADER'), "^(?!/\\*|\\s*\\*)")
+    }
+}
+
+tasks.named('compileJava') {
+    dependsOn 'spotlessJavaCheck'
+}
+
+tasks.named('check') {
+    dependsOn 'runSolutions'
+}

examples/stage0/solutions/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists