How to select position 1, position 2, and then make a wall?

So, as most of you know/heard, there is a plugin called worldedit. It is a very helpful plugin, and it includes the command //walls <blocktype>. I was wondering how they did that. I want it, so you do //specwalls <radius> for this. If there is any way you can tell me, please tell me. I don't think you would give code, because I'm expecting this'll take a long time, but please tell me with words.

 

Idea:
loc1
loc2

xMin = Math.min(loc1.getX, loc2.getX)
xMax = Math.max(loc1.getX, loc2.getX)

yMin = Math.min(loc1.getY, loc2.getY)
yMax = Math.max(loc1.getY, loc2.getY)

zMin = Math.min(loc1.getZ, loc2.getZ)
zMax = Math.max(loc1.getZ, loc2.getZ)

for(int x = xMin; x < xMax; x++){
for(int y = yMin; y < yMax; y++){
for(int z = xMin; z < zMax; z++){
(new Location(loc1.getWorld(), x, y, z)).getBlock().setType(Material.Stone);

}
}
}
(Note: This is not real java code, I was just outlining most of the code. the min and max should be ints,

 

http://forums.bukkit.org/threads/util-locationutils-updated-with-more-codes.198727/

 

To expand on what ArthurMaker did, (great lib btw), you can use this code:

Code:java

 
for(Location loc : getCuboid(loc1, loc2){
    Block b = loc.getBlock();
    b.setMaterial(Material.Stone);
}
 
 
// From Arthur:
public static List<Location> getCuboid(Location position1, Location position2){
 
if(position1.getWorld().getName() != position2.getWorld().getName()){
throw new UnsupportedOperationException("'Position1' and 'Position2' location need to be in the same world!");
}
 
List<Location> cube = new ArrayList<Location>();
 
int minX = (int) Math.min(position1.getX(), position2.getX());
int maxX = (int) Math.max(position1.getX(), position2.getX());
 
int minY = (int) Math.min(position1.getY(), position2.getY());
int maxY = (int) Math.max(position1.getY(), position2.getY());
 
int minZ = (int) Math.min(position1.getZ(), position2.getZ());
int maxZ = (int) Math.max(position1.getZ(), position2.getZ());
 
for(int x = minX; x <= maxX; x++){
for(int y = minY; y <= maxY; y++){
for(int z = minZ; z <= maxZ; z++){
cube.add(new Location(position1.getWorld(), x, y, z));
}
}
}
return cube;
 }