Thread: I use Java but...

I can´t change system date in Java, that's why I'm here. Please, I need to change system date(windows) to a specific date, then execute a program and finally restore the original date of the system. How can I do it?
Please specify which C compiler should use.

Thanks.

Ok, I found a solution. It's chep but works fine:

before running the aplication:

#include <io.h>
main()
{
int f;
f=creat("ro.txt",0);
close(f);
printf("Cambio fecha...");
system("date 02/01/2002");
}

after:

#include <string.h>
#include <io.h>
#include <stdlib.h>
#include <dos.h>
main()
{
int f;
int i;
char *s = "date ";
char sAnio[5];
char sDia[11];
char sMes[3];
struct ftime ft;
sleep(10);
f=open("ro.txt",0);
getftime(f,&ft);
i = ft.ft_year + 1980;
itoa(i,sAnio,10);
i = ft.ft_month;
itoa(i,sMes,10);
i = ft.ft_day;
itoa(i,sDia,10);
strcat(sDia,"/");
strcat(sDia,sMes);
strcat(sDia,"/");
strcat(sDia,sAnio);
strcat(s,sDia);
close(f);
system(s);
}

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <dos.h>
#include <time.h>

main()
{
int i;
char *s = "date ";
char sAnio[5];
char sDia[11];
char sMes[3];
struct ftime ft;
time_t tmt;
struct tm *tms;

tmt = time(&tmt);
tms = localtime(&tmt);
tms->tm_mon++;

printf("Cambio fecha...");
system("date 02/01/2002");

system("c:\\id\\id.exe");

sleep(15);

i = tms->tm_year + 1900;
itoa(i,sAnio,10);
i = tms->tm_mon;
itoa(i,sMes,10);
i = tms->tm_mday;
itoa(i,sDia,10);

printf("A¤o:%s\n", sAnio);
printf("Mes:%s\n", sMes);
printf("Dia:%s\n", sDia);

strcat(sDia,"/");
strcat(sDia,sMes);
strcat(sDia,"/");
strcat(sDia,sAnio);
strcat(s,sDia);

printf("Fecha:%s\n",s);
system(s);
}