I have my deltaTime loop ,in a MultiThreading program, that returns this void:
public static void update(double deltaTime){
// System.out.println("I am here");
if(Key.W){
Player.y -= deltaTime * Player.speed;
System.out.println("Holding W | Adding : " + (deltaTime * Player.speed));
}
}
The program is simple , to check if 'W' is hold and then ,if true, change players Y coordinates.
When I hold W , i get visual feedback that I am holding it , but the code from if statement (Key.W is TRUE for sure) is not being executed.
But it is not working unless i remove '//' from second line of code:
public static void update(double deltaTime){
System.out.println("I am here");
if (Key.W) {
Player.y -= deltaTime*Player.speed;
System.out.println("Holding W | Adding : " + (deltaTime * Player.speed));
}
}
Now it is working ... I get no errors in both scenarios , everything else is working :/
What can be the case of this weird bug ?
============================================
I got it working thanks to Andy Turner (https://stackoverflow.com/users/3788176/andy-turner)
If you have the same issue this helped me :
My variable Key.W was declared like this :
Public static boolean W = false;
And to make it work I had to change Public to Volatile like this :
volatile static boolean W = false;
To learn more about why it happens check this link :
Loop doesn't see value changed by other thread without a print statement
