Java write file restrictions, 3110

Help please, I can't find right path for my files.
Can I write files from unsubscribed java application? I've set application's option to "always ask" and always answering "YES" during write attempt.
Аll paths:
C:/
C:/Gallery/
C:/Gallery/test/ (folder was created from PC Suite)
C:/test/
C:/Галерея/ (I've switched phone to russian language)
C:/Галерея/test
still restricted (java exception).
Is there right path, accessible from java?
PS: Application is http://www.substanceofcode.com/software/mobile-trail-explorer/

Software development and developer-to-developer support discussion forums/boards on Forum Nokia:
http://forum.nokia.com/

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JNI Invocation: open file in Java, write file in CPP

Hello,
Warning: I am a dunce, bad CPP code ahead!
Using JNI invocation, I am trying to read a binary file in Java and write it in CPP.
Everything compiles and runs without error, but the input and output jpg files are of course different.
TIA to any help,
kirst
(begin ByteMe.java)
import java.io.*;
public class ByteMe
 // Returns the contents of the file in a byte array.
 public byte[] getBytesFromFile(String strInfo) throws IOException
 System.out.println("Testing:" + strInfo);
 File file = new File("1.jpg");
 InputStream is = new FileInputStream(file);
 // Get the size of the file
 long length = file.length();
 // Create the byte array to hold the data
 byte[] bytes = new byte[(int)length];
 // Read in the bytes
 int offset = 0;
 int numRead = 0;
 while (offset < bytes.length
 && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0) {
 offset += numRead;
 // Ensure all the bytes have been read in
 if (offset < bytes.length)
 throw new IOException("Could not completely read file "+file.getName());
 // Close the input stream and return bytes
 is.close();
 return bytes;
 public ByteMe()
 //System.out.println("in constructor");
}(end ByteMe.java)
(begin ByteMe.cpp)
#include <stdlib.h>
#include <string.h>
#include <jni.h>
#include <windows.h>
// for file operations:
#include <fstream>
int main( int argc, char *argv[] )
 JNIEnv *env;
 JavaVM *jvm;
 JavaVMInitArgs vm_args;
 JavaVMOption options[5];
 jint res;
 jclass cls;
 jmethodID mid;
 jstring jstr;
 jobject obj_print;
 options[0].optionString = "-Xms4M";
 options[1].optionString = "-Xmx64M";
 options[2].optionString = "-Xss512K";
 options[3].optionString = "-Xoss400K";
 options[4].optionString = "-Djava.class.path=.";
 vm_args.version = JNI_VERSION_1_4;
 vm_args.options = options;
 vm_args.nOptions = 5;
 vm_args.ignoreUnrecognized = JNI_FALSE;
 // Create the Java VM
 res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
 if (res < 0)
 printf("Can't create Java VM");
 goto destroy;
 cls = env->FindClass("ByteMe");
 if (cls == 0)
 printf("Can't find ByteMe class");
 goto destroy;
 jmethodID id_construct = env->GetMethodID(cls,"<init>","()V");
 jstr = env->NewStringUTF(" from C++\n");
 obj_print = env->NewObject(cls,id_construct);
 // signature obtained using javap -s -p ByteMe
 mid = env->GetMethodID(cls, "getBytesFromFile", "(Ljava/lang/String;)[B");
 if (mid == 0)
 printf("Can't find ByteMe.getBytesFromFile\n");
 goto destroy;
 else
 jbyteArray jbuf = (jbyteArray) env->CallObjectMethod(obj_print,mid,jstr);
 jlong size = jsize(jbuf);
 printf("size is: %d\n", size); // size shown in output is
 std::ofstream out("data.jpg", std::ios::binary);
 out.write ((const char *)jbuf, 100000);
 destroy:
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 env->ExceptionDescribe();
 jvm->DestroyJavaVM();
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Hello,
Me again. Well, not such a dunce after all. Here is code that works correctly, and compiles with no errors and no warnings.
Will much appreciate help with clean-up code.
TIA,
kirst
(begin ByteMe.java)
import java.io.*;
public class ByteMe
 public long getFilezize(String strInfo) throws IOException
 // demonstrates String parameter passed from CPP to Java:
 System.out.println("(getFilesize) Hello world" + strInfo);
 File file = new File("1.bmp");
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 System.out.println("(getBytesFromFile) Hello world" + strInfo);
 File file = new File("1.bmp");
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 System.out.println("length is: " + String.valueOf(length));
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 throw new IOException("Could not completely read file "+ file.getName());
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 is.close();
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 public ByteMe()
 //System.out.println("in constructor");
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(begin ByteMe.cpp)
 Signature obtained with command:
 "C:\Program Files\Java\jdk1.5.0_15\bin\javap.exe" -s -p ByteMe
 Compiled from "ByteMe.java"
 public class ByteMe extends java.lang.Object{
 public long getFilezize(java.lang.String) throws java.io.IOException;
 Signature: (Ljava/lang/String;)J
 public byte[] getBytesFromFile(java.lang.String) throws java.io.IOException;
 Signature: (Ljava/lang/String;)[B
 public ByteMe();
 Signature: ()V
 Compiled VC++ 2005 Express, run on Vista
#include <stdlib.h>
#include <string.h>
#include <jni.h>
// file operations
#include <fstream>
int main( int argc, char *argv[] )
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 JavaVM *jvm;
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 JavaVMOption options[5];
 jint res;
 jclass cls;
 jmethodID mid;
 jmethodID sizeid;
 jstring jstr;
 jobject obj_print;
 jlong filesize;
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 options[1].optionString = "-Xmx64M";
 options[2].optionString = "-Xss512K";
 options[3].optionString = "-Xoss400K";
 options[4].optionString = "-Djava.class.path=.";
 vm_args.version = JNI_VERSION_1_4;
 vm_args.options = options;
 vm_args.nOptions = 5;
 vm_args.ignoreUnrecognized = JNI_FALSE;
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 res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
 if (res < 0)
 printf("Can't create Java VM");
 goto destroy;
 cls = env->FindClass("ByteMe");
 if (cls == 0)
 printf("Can't find ByteMe class");
 goto destroy;
 jmethodID id_construct = env->GetMethodID(cls,"<init>","()V");
 printf("%s\n",id_construct);
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 if (jstr == 0)
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 goto destroy;
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 printf("got here\n");
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 printf("got filesize\n");
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 mid = env->GetMethodID(cls, "getBytesFromFile", "(Ljava/lang/String;)[B");
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 printf("Can't find ByteMe.getBytesFromFile\n");
 goto destroy;
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 jbyte *retdata = env->GetByteArrayElements(ret, NULL);
 // write the file
 std::ofstream out("data.bmp", std::ios::binary);
 //out.write ((const char *)retdata, 921654);
 out.write ((const char *)retdata, (long)filesize);
 // END BLOCK to write file
 destroy:
 if (env->ExceptionOccurred())
 env->ExceptionDescribe();
 jvm->DestroyJavaVM();
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Message was edited by:
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Java write file restrictions, 3110

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