Call native function fflush & strprn from java

Question

Hi,
I need to call a native function fflush and stdprn from java for printing a file.
How can i call this function?
Can any one help me with sample code.
Thanks,
rpalanivelu

Answer 1

Thanks your reply,
Actually my problem is need to take printout using dot matrix printer(text printer) with different font size.
So, i am using native method which is available in c.
in c program i am using fflush,stdprn and fprintf.
Here i've attached my sample program also.
#include <jni.h>
#include "NativePrint.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAXLINE_LEN 100
JNIEXPORT jint JNICALL
Java_NativePrint_dotMatrixPrint(JNIEnv* env, jobject obj )
FILE *fp;
char filename[20];
char line[100]; /* A line read from the file */
int lineNumber = 0;
/* Print control codes */
char boldOn = 14;
char boldOff = 20;
char contentlenOn = 15;
char contentlenOff = 18;
printf("Printing from C3");
strcpy( filename , "sayHello.c" );
/* Open the file in read mode */
fp = fopen( filename , "r" );
/* Error in opening file, then exit */
if ( fp == NULL )
printf( "\nERROR: %s cannot be opened\n" , filename );
exit( 1 );
while ( fgets( line , 100 , fp ) != NULL )
lineNumber++; /* Line we are about to process next */
printf("%s",line);
/* If this is the first line */
if ( lineNumber == 1 )
/* then print it in bold */
//fprintf( stdprn , "%c" , boldOn );
fprintf( stdprn , "%c" , contentlenOn );
fprintf( stdprn , line );
fprintf( stdprn , "%c" , contentlenOff);
//fprintf( stdprn , "%c" , boldOff );
else
/* else print it in normal mode */
fprintf( stdprn , line );
fflush(stdprn);
return 0;