update at 2022-02-24 11:03:22 by ehlxr
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parent
c8150fa580
commit
7280cff05a
@ -1,25 +1,35 @@
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package me.ehlxr;
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class HelloWorld {
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private static native String hello(String input);
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private static native byte[] helloByte(byte[] input);
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private static native void factAndCallMeBack(int n, HelloWorld callback);
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private static native long counterNew(HelloWorld callback);
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private static native void counterIncrement(long counter_ptr);
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private static native void counterDestroy(long counter_ptr);
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private static native void asyncComputation(HelloWorld callback);
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private static native String fetchNameStr(HelloWorld param);
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static {
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// Linux: export LD_LIBRARY_PATH=/Users/ehlxr/Desktop/jni_rs/mylib/target/debug
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// Mac: export JAVA_LIBRARY_PATH=/Users/ehlxr/Desktop/jni_rs/mylib/target/debug
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System.loadLibrary("mylib");
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}
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public long no;
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private String name;
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public int age;
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private static native String hello(String input);
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private static native byte[] helloByte(byte[] input);
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private static native void factAndCallMeBack(int n, HelloWorld callback);
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private static native long counterNew(HelloWorld callback);
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private static native void counterIncrement(long counter_ptr);
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private static native void counterDestroy(long counter_ptr);
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private static native void asyncComputation(HelloWorld callback);
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private static native String getFiled(HelloWorld param);
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public static void main(String[] args) {
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// String output = HelloWorld.hello("Java");
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// System.out.println(output);
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String output = HelloWorld.hello("Java");
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System.out.println(output);
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// byte[] outputByte = HelloWorld.helloByte("byte".getBytes());
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// System.out.println(outputByte);
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@ -37,20 +47,19 @@ class HelloWorld {
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// System.out.println("Invoking asyncComputation (thread id = " + Thread.currentThread().getId() + ")");
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// asyncComputation(new HelloWorld());
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HelloWorld hw = new HelloWorld();
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hw.setNameStr("fsdfs");
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System.out.println(HelloWorld.fetchNameStr(hw));
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hw.setName("Jack");
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hw.no = 123434555L;
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hw.age = 30;
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System.out.println(HelloWorld.getFiled(hw));
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}
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private String nameStr;
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public void setNameStr(String nameStr){
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this.nameStr=nameStr;
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public String getName() {
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return name;
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}
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public String getNameStr(){
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return nameStr;
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public void setName(String name) {
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this.name = name;
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}
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public void factCallback(int res) {
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@ -4,13 +4,32 @@ use jni::JNIEnv;
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use std::{sync::mpsc, thread, time::Duration};
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#[no_mangle]
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pub extern "system" fn Java_me_ehlxr_HelloWorld_fetchNameStr(
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pub extern "system" fn Java_me_ehlxr_HelloWorld_getFiled(
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env: JNIEnv,
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_class: JClass,
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input: JObject,
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) -> jstring {
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let age = env.get_field(input, "age", "I").unwrap().i().unwrap();
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println!("get age field: {}", age);
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let name: JString = env
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.get_field(input, "name", "Ljava/lang/String;")
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.unwrap()
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.l()
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.unwrap()
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.into();
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println!(
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"get name field: {}",
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String::from(env.get_string(name).unwrap())
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);
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let no = env.get_field(input, "no", "J").unwrap().j().unwrap();
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// let jstr = env.get_string(JString::from(no)).unwrap();
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// println!("get addr field: {}", String::from(jstr));
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println!("get no field: {}", no);
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let out_str = if let JValue::Object(result) = env
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.call_method(input, "getNameStr", "()Ljava/lang/String;", &[])
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.call_method(input, "getName", "()Ljava/lang/String;", &[])
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.unwrap()
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{
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let jstr = env.get_string(JString::from(result)).unwrap();
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