Road Worker Karel

package Activity4;
import kareltherobot.*;

/**
 * This program loads a world, and then the robot checks and fills any hole it encounters
 */
public class Activity4Main extends Robot{
    public Activity4Main(int s, int a, Direction d, int b) {
        super(s, a, d, b);
    }

    public static void main(String[] args){
        World.readWorld("Lesson4World3.kwld"); //creates world
        World.setVisible();
        World.setDelay(30);

        Activity4Main will = new Activity4Main(3,1, North, -1); //creates robot

        will.turnRight();

        for(int x = 0; x < 9; x++){ //fills the hole if there is one and moves forward
            will.move();
            will.fillHole();
        }
    }

    /**
     * this function instantly checks whether the robot needs to fill a hole
     * @return if there is a hole or not
     */
    public boolean checkForHole(){
        int delay = World.delay();
        World.setDelay(0);
        boolean y = false;
        turnRight();

        if(frontIsClear()){ //if the front is clear, there is a hole
           y = true;
        }

        World.setDelay(delay);
        turnLeft();
        return y;
    }

    /**
     * If there is a hole, fill it
     * @return void
     */
    public void fillHole(){
        if(checkForHole()){
            turnRight();
            move();
            putBeeper();
            turnLeft();
            turnLeft();
            move();
            turnRight();
        }
    }

    /**
     * This function allow the robot to instantly turn right
     * @param - none
     * @return - void
     */
    public void turnRight(){
        int delay = World.delay();
        World.setDelay(0);
        turnLeft();
        turnLeft();
        World.setDelay(delay);
        turnLeft();
    }
}