Question related to Postfix and Prefix

publicstaticvoid main(String[] args)

{

int x = 0, y = 1, z = 2;

x = x++;

y = --y;

z = ++x + 4;

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

System.out.println("y =" + y);

System.out.println("z =" + z);

}

Run the code out and you will find out that the final result is x = 1, y = 0, and z = 5. Expected output should be x = 2, y = 0, z = 6.

My question is

Why when the statement x = x++; executed, the value of x remain as 0?

x++ is postfix but it seem that it was never evaluated based on debugger.

x only become 1 when the statement z = ++x + 4;

The prefix work like normal but postfix is a bit unexpected.

Need an expert to explain this to me.

Thanks.

[1010 byte] By [Max102a] at [2007-11-26 22:54:24]