Get Block Behind player?

I need a way to do this.. Which values should I modify with player.getLocation()?

 

Take the yaw % 90
That should give you (round it): 1, 2, 3, or 4
Each number stands for like -x or +x or -z or +z, but you gotta figure that out

 

Uh.. Can I get some examples? I'm not very experienced in Java or Bukkit..

 

After a bit of testing:

-snip-

Edit: Wait, don't use that code. For some reason yaw will go positive or negative, so I had to change it a bit:

Code:

World world = player.getWorld();
Location loc = player.getLocation();
Block behind = loc.getBlock();
int direction = (int)loc.getYaw();
 
if(direction < 0) {
    direction += 360;
    direction = (direction + 45) / 90;
}else {
    direction = (direction + 45) / 90;
}
 
switch (direction) {
    case 1:
        behind = world.getBlockAt(behind.getX() + 1, behind.getY(), behind.getZ());
        break;
    case 2:
        behind = world.getBlockAt(behind.getX(), behind.getY(), behind.getZ() + 1);
        break;
    case 3:
        behind = world.getBlockAt(behind.getX() - 1, behind.getY(), behind.getZ());
        break;
    case 4:
        behind = world.getBlockAt(behind.getX(), behind.getY(), behind.getZ() - 1);
        break;
    case 0:
        behind = world.getBlockAt(behind.getX(), behind.getY(), behind.getZ() - 1);
        break;
    default:
        break;
}