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

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This commit is contained in:
ehlxr 2022-02-23 23:08:27 +08:00
parent 53521e036f
commit 21b0ed000d
2 changed files with 9 additions and 7 deletions
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6
java_src/me/ehlxr/HelloWorld.java
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@ -39,16 +39,14 @@ class HelloWorld {
HelloWorld hw = new HelloWorld(); HelloWorld hw = new HelloWorld();
// hw.setNameStr("fsdfs"); hw.setNameStr("fsdfs");
System.out.println(HelloWorld.fetchNameStr(hw)); System.out.println(HelloWorld.fetchNameStr(hw));
} }
private String nameStr; private String nameStr;
public void setNameStr(String nameStr){ public void setNameStr(String nameStr){
System.out.println(nameStr); this.nameStr=nameStr;
// this.nameStr=nameStr;
} }
public String getNameStr(){ public String getNameStr(){

10
mylib/src/lib.rs
View File

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