What is the output and why?

Question

public class Program
{
public static void main(String[] args) {
int i=010;
int j = 07;
System.out.println(i);
System.out.println(j);
}
}

Answer 1

The result is 8 and 7.
This is because 010 and 07 are octal representation of integers. In java any number preceded by an 0 is considered to be an octal number

Answer 2

Gaurav Rawat , variable i is interpreted as octal number, because it starts with 0. When you convert 010 from octal to decimal the result is 8.

Answer 3

Any integer preceded by 0 means it is an octal representation.
So decimal representation of 10 is
1×(8^1) + 0×(8^0)
8+0 = 8
Similarly solve for the other.