Question about ++x and x++

[makeawish]

In Java, do these two operators mean the same thing?

x++ and ++x

So if x = 6

x++ = 7
++x = 7

And the code below would print 14.

System.out.println(x++ + ++x);

The problem is...

when x = 6 and

	System.out.println(x++ + ++x);
		System.out.println(x++);
		System.out.println(++x);

I get results: 14, 8, 10

Please can someone explain why? Thank you.

[JosAH]

Straight from the Java Language Definition:

15.14.2 Postfix Increment Operator ++

[ ... ] The value of the postfix increment expression is the value of the variable before the new value is stored.

15.15.1 Prefix Increment Operator ++

[ ... ] the value 1 is added to the value of the variable and the sum is stored back into the variable.

kind regards,

Jos

[suresh.sa]

Code:
System.out.println(x++ + ++x);
System.out.println(x++);
System.out.println(++x);

In this code first line makes x++ -> 7 again ++x -> 8
so, now the value of x when coming to second line is 8, so it prints the X value as 8,then
in second line one more increment,so x= 9 now, in third line pre-increment(++x) so it prints x value as 10 for the third SOP statement.


Regards,
Suresh. S.A.