Karel - leftIsClear()

package Activity1;
import kareltherobot.*;

/**
 * The robot checks if the left intersection is clear to decide if
 * it is going to move or do a back-flip
 */
public class Activity1Main extends Robot{

    public Activity1Main(int s, int a, Direction d, int b){
        super(s, a, d, b);
    }

    public static void main(String[] args) {
        World.setVisible(); //generates world
        World.setDelay(40);
        World.readWorld("Lesson4World1.kwld");
        Activity1Main mike = new Activity1Main(1,3, North, 0);

        for(int x = 0; x < 4; x++){
            mike.move(); //executes 4 times to get the robot out of the structure
        }
    }

    /**
     * Function checks if the intersection immediately to the left is clear
     * @param - none
     * @return if the left is clear
     */
    public boolean leftIsClear(){
        int delay = World.delay();
        World.setDelay(0);
        turnLeft();
        boolean temp;

        if(!frontIsClear()){
            temp = false;
        }else{
            temp = true;
        }
        World.setDelay(delay);
        turnRight();

        return temp;
    }

    /**
     *Makes the robot check if the left is clear before moving
     * @Overriding
     * @param - none
     * @return - void
     */
    public void move(){
        if(!leftIsClear()){
            super.move(); //if the left is blocked, move forward
        }else{
            for(int i = 0; i < 4; i++){
                turnLeft();  //if the left is clear, do a celebratory back-flip
            }
        }
    }

    /**
     * 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();
    }
}