Solved How to repeat code until success?

For example:

Code:

if (cmd.getName().equalsIgnoreCase("rtp"){
    if (player is stupid){
        player.sendMessage("You can not be stupid!");
        return true;
    }
    player.sendMessage("Good job, you are not stupid!");
    return true;
}

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How to make this code repeating until player won't be stupid?

 

@timtower
So how to change this code to find another random location if player hit on not allowed biome?

Code:

        if (cmd.getName().equalsIgnoreCase("rtp")){
            World w = p.getWorld();
            Location location = new Location(w, 0, 0, 0);
          
            location.setX(settings.getData().getDouble("spawn.x") + Math.random() * 500 * 2 - 500);  //This get a Random with a MaxRange
            location.setZ(settings.getData().getDouble("spawn.z") + Math.random() * 500 * 2 - 500);
            location.setY(w.getHighestBlockAt(location.getBlockX(), location.getBlockZ() ).getY() );  //Get the Highest Block of the Location for Save Spawn.
            Biome biome = w.getBiome(location.getBlockX(), location.getBlockZ());
            if (biome == Biome.OCEAN || biome == Biome.DEEP_OCEAN || biome == Biome.RIVER){
                p.sendMessage("§cNot allowed biome, try again");
                return true;
            }
            p.teleport(location);
            p.sendMessage("§aTeleported!");
        }

 

@timtower
How to do that? Can you give me a hint?

 

@Urag
He already explained it

Code:

while(true) { //Keep this thing going :O
  Location random = yourRandomLocation(); //Get a random location
  if(/*The Location is the one you want*/) {
    player.teleport(random);
    return true; //If you want to perform code after this loop, put 'break;' here, so the loop ends.
  } //If the location doesn't match the requirements, the next thing is called in the while loop, it will go into infinity until it finds the right location
}
[/code

 

@megamichiel
Thank you!

Code:

        if (cmd.getName().equalsIgnoreCase("rtp")){
            while(true) { //Keep this thing going :O
                World w = p.getWorld();
                Location location = new Location(w, 0, 0, 0);
              
                location.setX(settings.getData().getDouble("spawn.x") + Math.random() * 500 * 2 - 500);  //This get a Random with a MaxRange
                location.setZ(settings.getData().getDouble("spawn.z") + Math.random() * 500 * 2 - 500);
                location.setY(w.getHighestBlockAt(location.getBlockX(), location.getBlockZ() ).getY() + 1);  //Get the Highest Block of the Location for Save Spawn.
                Biome biome = w.getBiome(location.getBlockX(), location.getBlockZ());
                if (!(biome == Biome.OCEAN || biome == Biome.DEEP_OCEAN || biome == Biome.RIVER)){
                    p.teleport(location);
                    p.sendMessage("§aGut biome");
                    return true;
                  }
                p.sendMessage("§cBad biome");
                }
        }