Thread: little questions

I'll be posting here all the little questions i'll have just not to open a new thread every time.
1. Neither Eclipse nor Netbeans don't compile the addition of one in this way.

public class MainClass {

public static void main(String[] args) {

int intValue = 10;
int newValue = intValue ++;
System.out.println(newValue);

}

}
The result is still 10.

2. I know that if i declare a primitive without assinging a number to it, it will have automatically assigned 0. in my case it doesn't work.


public class MainClass {

public static void main(String[] args) {

double intValue;

System.out.println(intValue);

}

}

Prefix and postfix notation is one of those things I can never quite keep straight. I always use those statements completely within their own isolated statement and can't figure out why anyone would do otherwise. It seems like you're just asking for trouble introducing extra confusion for no reason.