working decimal point numbers

I wrote a program in java about floating point but the output obtained is not an accurate one; whereas the same program written in C did produce an accurate result.

Code Snippet:

public class One {

public static void main(String...args){

    double i, num=0.0;
    for(i=0;i<10;i++)
    num=num+0.1;
    System.out.println(num);

    }
}

output: 0.9999999999999999

The program in C goes like this

#include<stdio.h>
main()
{

double i,num=0.0;
for(i=0;i<10;i++)
num=num+0.1;

printf("%f",num);

}

output:1.00000

What am I doing wrong?