std::map<std::string，JavaCPP的std::string>转换
std::map<std::string，JavaCPP的std::string>转换
提问于 2017-12-13 02:38:03
我是JavaCPP的新手，现在我有麻烦了。
我的遗嘱图书馆：
#include <string>
#include <map>
class TestClass {
public:
TestClass() {
property["a"]="b";
}
const std::map<std::string,std::string>& getMap(std::string str) {
if (str == "a"){
return property;
}
}
std::map<std::string,std::string> property;
};TestLibrary.java
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
@Platform(include="TestLibrary.h")
public class TestLibrary {
public static class TestClass extends Pointer {
static { Loader.load(); }
public TestClass() { allocate(); }
private native void allocate();
public static native @ByRef KeyValueMap getMap(String str);
}
@Name("std::map<std::string,std::string>") public static class
KeyValueMap extends Pointer {
static { Loader.load(); }
public KeyValueMap(Pointer p) { super(p); }
public KeyValueMap() { allocate(); }
private native void allocate();
public native long size();
@Index public native @StdString BytePointer get(@StdString
BytePointer i);
public native KeyValueMap put(@StdString BytePointer i, BytePointer
value);
}
public static void main(String[] args) {
TestClass l = new TestClass();
KeyValueMap m = l.getMap("a");
System.out.println(m);
//System.out.println(m.get("a"));
}
} 什么时候
javac -cp javacpp.jar TestLibrary.java
java -jar javacpp.jar TestLibrary
jniTestLibrary.cpp:2238:30: error:调用不带对象参数的非静态成员函数rptr =&：TestClass：：getMap(Ptr0)；
~~~~~~~~~~~~~^~~~~~上面的代码是从NativeLibrary示例中修改的。但是如何解决编译问题呢？我能那样使用m.get("a")吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2017-12-13 04:09:38
我通过改变.
测试图书馆h：
#include <string>
#include <map>
class TestClass {
public:
TestClass() {
property["a"]="b";
}
std::map<std::string,std::string>& getMap(std::string str) {
if (str == "a"){
return property;
}
}
std::map<std::string,std::string> property;
};TestLibrary.java
import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;
@Platform(include="TestLibrary.h")
public class TestLibrary {
public static class TestClass extends Pointer {
static { Loader.load(); }
public TestClass() { allocate(); }
private native void allocate();
public native @ByRef KeyValueMap getMap(String str);
}
@Name("std::map<std::string,std::string>")
public static class KeyValueMap extends Pointer {
static { Loader.load(); }
public KeyValueMap(Pointer p) { super(p); }
public KeyValueMap() { allocate(); }
private native void allocate();
public native long size();
@Index public native @StdString BytePointer get(@StdString BytePointer i);
public native KeyValueMap put(@StdString BytePointer i, BytePointer value); }
public static void main(String[] args) {
TestClass l = new TestClass();
KeyValueMap m = l.getMap("a");
System.out.println(m.size());
System.out.println(m.get(new BytePointer("a")).getString());
}} 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/47784687
复制相关文章
相似问题
腾讯云开发者
