Solved Variables changing on its own

Hi everyone,
Oke in my code I check everyblock in an area for a specific block. I change the targetted block by using the add() function on a location variable. I use a different location variable to reset it but for some reason the location variable that resets also gets changed. My code is a bit messy because I commented some stuff out for debugging.

Code:

Location cornerLoc = new Location(Bukkit.getServer().getWorld(args[6]), Double.parseDouble(args[0]) - Double.parseDouble(args[3]), Double.parseDouble(args[1]) - Double.parseDouble(args[4]), Double.parseDouble(args[2]) - Double.parseDouble(args[5]));
                Location checkLoc = cornerLoc;
                sender.sendMessage(cornerLoc.toString());
                for(int x=0; x<=Double.parseDouble(args[3]) * 2 - 1; x++) {
                    for(int y=0; y<=Double.parseDouble(args[4]) * 2 - 1; y++) {
                        for(int z=0; z<=Double.parseDouble(args[5]) * 2 - 1; z++) {
                            checkLoc.add(x, y, z);
                            //if(checkLoc.getBlock().getType() == Material.WHITE_GLAZED_TERRACOTTA)
                                //Bukkit.getServer().getWorld(args[6]).spawnEntity(checkLoc.add(0, 2, 0), EntityType.ZOMBIE);
                            sender.sendMessage(cornerLoc.toString());
                            //checkLoc = cornerLoc;

The first three arguments are positions, 3, 4, 5 are scales and the last one is worldname. If I use this and enter 0 for all positions and 1 for all scales it is supposed to say only -1 -1 -1 but instead it says that the value is the same as checkLoc, butin the code the variable cornerLoc never gets changed... I know probably shouldnt use add but I did not find an easy alternative .

 

@NiekZndt Use Location#clone()#add() instead. The 'checkLoc' variable references the 'cornerLoc' location.

 

Thank you again for saving my project UwU, it all works fine again and everything looks a lot clearer!