Change block under player

Hey Guys,
i'm coding my own minigame, but I have a problem. I want to change the block under a player, but Java says that there is a problem.

Code:

    Location loc = p.getLocation();
            double y = loc.getY()-1;
            World w = Bukkit.getWorld("CaptureTheBomb");
            w.getBlockAt(y).setType(Material.TNT);

I tested arround a lot but couldn't find a solution. If y is a double, Java says I should change it to "Location". But if it is an Location I cannot subtract 1. Please help me!

 

idk how you are getting that problem. Make sure you import the right stuff.

@longroad

 

@longroad

This method does not exist for type World. You need to use the "getBlockAt(X ,Y, Z)" to get a block at a specific location.

 

@Zombie_Striker but how can i change the block under a player? I don't want to set it on the ground, it should be in the ground

 

@longroad
The only thing you need to do is change "getBlockAt(y)" to "getBlockAt (X, y, Z)"

 

@longroad
Like @Zombie_Striker said, the method you re using requires 3 arguments.
You can get the X, Y and Z by using the "loc.getX(), loc.getY() and loc.getZ()" methods, then you can minus the value of Y inside the method(?) like getBlockAt(x, loc.getY()-1, z)

 

Thanks to everybody, stupid mistake^^