Java initialization variable increment

Is it risky to initialize a global variable in increments of another global variable?

Example:

int a=0; 
int b=a++; 
int c=a++; 
int d=a++;

This should output:

0,1,2,3

Can the compiler read global values before another?

Solution

It will run as expected If you try to use a field before defining it, the compiler throws an error:

public class Foo {
    int a = b++; //compiler error here
    int b = 0;
}

This is covered in JLS 8.3

In your case, if the output of the variable is not modified, it is:

a = 3
b = 0
c = 1
d = 2