update at 2022-02-23 23:08:27 by ehlxr

java_src/me/ehlxr/HelloWorld.java

@@ -39,16 +39,14 @@ class HelloWorld {
 
 
         HelloWorld hw =  new HelloWorld();
-        // hw.setNameStr("fsdfs");
+        hw.setNameStr("fsdfs");
         System.out.println(HelloWorld.fetchNameStr(hw));
     }
 
     private String nameStr;
 
     public void setNameStr(String nameStr){
-      System.out.println(nameStr);
-
-      // this.nameStr=nameStr;
+      this.nameStr=nameStr;
     }
 
     public String getNameStr(){

mylib/src/lib.rs

@@ -9,15 +9,19 @@ pub extern "system" fn Java_me_ehlxr_HelloWorld_fetchNameStr(
     _class: JClass,
     input: JObject,
 ) -> jstring {
-    if let JValue::Object(rt) = env
+    let out_str = if let JValue::Object(result) = env
         .call_method(input, "getNameStr", "()Ljava/lang/String;", &[])
         .unwrap()
     {
-        println!("return {:?}", rt)
+        let jstr = env.get_string(JString::from(result)).unwrap();
+        // println!("call getNameStr result: {}", String::from(jstr));
+        format!("Hello, {}! from Rust..", String::from(jstr))
+    } else {
+        format!("Hello! from Rust..")
     };
 
     let output = env
-        .new_string(format!("Hello, {:?}! from Rust..", input))
+        .new_string(out_str)
         .expect("Couldn't create java string!");
     output.into_inner()
 }