Add remaining simple examples

Bug: b/270105162
Change-Id: Iee14451d895acea5621656772eef5c1faab75dc1
diff --git a/d8_r8/test_modules/tests_java_examples/build.gradle.kts b/d8_r8/test_modules/tests_java_examples/build.gradle.kts
new file mode 100644
index 0000000..05798be
--- /dev/null
+++ b/d8_r8/test_modules/tests_java_examples/build.gradle.kts
@@ -0,0 +1,41 @@
+// Copyright (c) 2023, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import org.gradle.api.JavaVersion
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+  `kotlin-dsl`
+  `java-library`
+  id("dependencies-plugin")
+}
+
+val root = getRoot()
+
+java {
+  sourceSets.test.configure {
+    java.srcDirs.clear()
+    java.srcDir(root.resolveAll("src", "test", "examples"))
+  }
+  sourceCompatibility = JavaVersion.VERSION_1_8
+  targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+dependencies {
+  testCompileOnly(Deps.mockito)
+}
+
+// We just need to register the examples jars for it to be referenced by other modules.
+val buildExampleJars = buildJavaExamplesJars("")
+
+tasks {
+  withType<JavaCompile> {
+    options.setFork(true)
+    options.forkOptions.memoryMaximumSize = "3g"
+    options.forkOptions.jvmArgs = listOf(
+      "-Xss256m",
+      // Set the bootclass path so compilation is consistent with 1.8 target compatibility.
+      "-Xbootclasspath/a:third_party/openjdk/openjdk-rt-1.8/rt.jar")
+  }
+}