first commit

java/HelloWorld.h

@@ -0,0 +1,21 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class HelloWorld */
+
+#ifndef _Included_HelloWorld
+#define _Included_HelloWorld
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     HelloWorld
+ * Method:    callRustFunction
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_HelloWorld_callRustFunction
+  (JNIEnv *, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

java/HelloWorld.java

@@ -0,0 +1,17 @@
+// java/HelloWorld.java
+public class HelloWorld {
+    static {
+        System.loadLibrary("rust_interop");
+    }
+
+    public native void callRustFunction();
+
+    public String getGreeting() {
+        return "Hello from Java!";
+    }
+
+    public static void main(String[] args) {
+        HelloWorld hw = new HelloWorld();
+        hw.callRustFunction();
+    }
+}

java/Main.java

@@ -0,0 +1,14 @@
+// java/Main.java
+public class Main {
+    static {
+        System.loadLibrary("rust_jni_example");
+    }
+
+    private static native void call_java_from_rust();
+
+    public static void main(String[] args) {
+        System.out.println("Calling Rust function...");
+        call_java_from_rust();
+        System.out.println("Rust function call completed.");
+    }
+}