Problem with boolean

public class Ant extends Creature
{

    private boolean canCarryFood = true;

    /**
     * Create an ant with a given home hill. The initial speed is zero (not moving).
     */
    public Ant(AntHill home)
    {
        setHomeHill(home);
    }

    /**
     * Do what an ant's gotta do.
     */
    public void act()
    {
        searchFood();     
        if (canCarryFood = false){
            walkTowardsHome();
        }            
    }
    
    private boolean canCarryingFood()
    {
        return canCarryFood;
    }
    
    private void searchFood()
    {
        Food food = (Food)getOneIntersectingObject(Food.class);
        randomWalk();        
        if (food != null && canCarryFood){
            canCarryFood = false;  
            this.setImage("ant-with-food.gif");            
            food.updateImage();
            food.lostFood();
        }       
    }
    
}