Java Programming - Flow Control - Discussion

Let me explain,

public class Switch2
{
final static short x = 2;//it will never change the value of x
public static int y = 0;
public static void main(String [] args)
{
for (int z=0; z < 3; z++)
{
switch (z)
{
case x: System.out.print("0 ");
case x-1: System.out.print("1 ");
case x-2: System.out.print("2 ");
}
}
}
}


Iteraton->1 :z=0->switch(0)
goes to case (x-2)-> case(2-2)->case(0):
So 2 will be printed .

======================
Iteration->2 z gets incremented ->z=1->switch(1)
goes to case(x-1)->case(2-1) ->case(1):
prints 1 and there is no break statement so goes to next print statement prints 2.

======================
Iteration->3 z gets incremented ->z=2 ->switch(2)
goes to case(x)->case(2)->case(2):
prints 0 and there is no break statement so 1 and 2 will gets printed
ANd the final output will be->2 1 2 0 1 2.

Can anyone explain it clearly?

Remember, once a match is found all remaining statements are executed until a break statement is encountered.

Hi.

1. The Final Keyword is like constant keyword in C, we can not re-assign the value once it is declared.

2. As per switch statement, when the value of z is 0 than the case with 0 will get executed.
( switch statement compares the value of a variable to the values specified in case of statements then first).

So first time 0 is printed.

Similarly for other scenarios.

3.Y is just initialized but not used just to make the program look complex.

I did not understand how final keyword works and how the control works on the switch statement?

Sorry but no one explains about final keyword because x is declared as final then how it's value will change.

I didn't understand how the conditions are matching in the program. There are simple values given by z in every iteration which is executed and printed what's the roll of x and y then?

Guys! what is the first condition?

What is the connection between loop, x and also cases?

Nice programming question.

If we do not have a break instruction, the next instructions in the loop gets executed!