Source Code : Create JNI C method

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Create JNI C method

 
/**
   @version 1.10 1997-07-01
   @author Cay Horstmann
*/

#include "Printf1.h"
#include <stdio.h>

JNIEXPORT jint JNICALL Java_Printf1_print(JNIEnv* env, jclass cl, 
   jint width, jint precision, jdouble x)
{  
   char fmt[30];
   jint ret;
   sprintf(fmt, "%%%d.%df", width, precision);
   ret = printf(fmt, x);
   fflush(stdout);
   return ret;
}

///////////////////////////////////////

/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @version 1.10 1997-07-01
 * @author Cay Horstmann
 */
class Printf1
{
   public static native int print(int width, int precision, double x);

   static
   {
      System.loadLibrary("Printf1");
   }
}



///////////////////////////////////////
/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @version 1.10 1997-07-01
 * @author Cay Horstmann
 */
class Printf1Test
{
   public static void main(String[] args)
   {
      int count = Printf1.print(8, 4, 3.14);
      count += Printf1.print(8, 4, count);
      System.out.println();
      for (int i = 0; i < count; i++)
         System.out.print("-");
      System.out.println();
   }
}

   
  

Thank with us