Remove blocks in 20 x 10 x 20 radius

Hi! So I am starting to focus on Block Manipulation as I know hardly anything about it.
Here is my code:

Code:java

public void removeBlocks(Player player) {
        int startx = player.getLocation().getBlockX();
        int starty = player.getLocation().getBlockY();
        int startz = player.getLocation().getBlockZ();
        int endx = startx + 20;
        int endy = starty + 10;
        int endz = startz + 20;
 
        for (int x = startx; x < endx; x++) {
            for (int y = starty; y < endy; y++) {
                for (int z = startz; z < endz; z++) {
                    Block block = player.getWorld().getBlockAt(x, y, z); //do what you want with the block
                    block.setType(Material.AIR);
                }
            }
        }
    }

I want this to remove blocks in a 20 x 10 x 20 radius. But the snippet of code above does not work.

 

CraftCreeper6
Basically your end and start locations are 2 corners, so what you are making is a rectangular prism.
You have to have your center be a location. Store the x, y, and z of the center in their own variables. Increment x from storedx - 20 to storedx + 20, nested y loop doing same thing, nested z loop doing same thing. Then get that location and set it to air.

 

AoH_Ruthless
Nevermind, fixed it with: How would I stop this happening though?: http://prntscr.com/4rjjd3

Code:java

public static void removeBlocks(Player player) {
double startx = player.getLocation().getX();
double starty = player.getLocation().getY();
double startz = player.getLocation().getZ();
double endx = startx + 20;
double endy = starty + 10;
double endz = startz + 20;
 
for (double x = startx; x < endx; x++) {
for (double y = starty; y < endy; y++) {
for (double z = startz; z < endz; z++) {
Location loc = new Location(player.getWorld(), x, y, z);
Block block = player.getWorld().getBlockAt(loc); //do what you want with the block
block.setType(Material.AIR);
}
}
}
}