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POJNI how to access Java Object (Integer)
 

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    <p>I have a JNI method to access java method which returns an Integer object. I do not want to return the primitive int type because this code will be modified to handle Generic objects. The following is what I have. I am not able to get the value of the Integer that I pass. The output at C++ side is something like </p> <pre><code>value = 0x4016f3d0 </code></pre> <p>How can I get the actual value of Integer object that I pass at C++ end? </p> <p>Please help.</p> <p>Thanks,</p> <p>-H</p> <p><em>GenericPeer.cpp</em></p> <pre><code>JNIEXPORT void JNICALL Java_GenericPeer_print (JNIEnv *jenv, jclass jcls, jobject data){ jclass peerCls = jenv-&gt;GetObjectClass(data); jmethodID mGetValue = jenv-&gt;GetMethodID(peerCls, "getValue","()Ljava/lang/Integer;"); if(mGetValue == NULL){ return (-1); } jobject value = jenv-&gt;CallObjectMethod(data, mGetValue); cout&lt;&lt;"value = "&lt;&lt;value&lt;&lt;endl; } </code></pre> <p><em>GenericPeer.java</em></p> <pre><code>public class GenericPeer { public static native void print(Data d); static { System.load("/home/usr/workspace/GenericJni/src/libGenericJni.so"); } } </code></pre> <p><em>Data.java</em></p> <pre><code>public class Data { private Integer value; pubilc Data(Integer v){ this.value = v; } public Integer getValue() { return value; } public void setValue(Integer value) { this.value = value; } } </code></pre> <p><em>Test.java (Main class)</em></p> <pre><code>public class Test { public static void main(String[] args){ Integer i = new Integer(1); Data d = new Data(i); GenericPeer.print(d); } } </code></pre>
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