to be added to Hero class:

    public Boolean isTouchingObstacle( Obstacle obst ) {
        Boolean answer;

        if ( obst.getRightEdge() < over ) {
            answer = false;
        }
        else if ( obst.getLeftEdge() > over + width ) {
            answer = false;
        }
        else if ( obst.getBottomEdge() < down ) {
            answer = false;
        }
        else if ( obst.getTopEdge() > down + height ) {
            answer = false;
        }
        else {
            answer = true;
        }

        return answer;
    } // end of isTouchingObstacle()

Hero is RIGHT of Obstacle (obst.getRightEdge() < over)

Hero is LEFT of Obstacle (obst.getLeftEdge() > over + width)

Hero is BELOW Obstacle (obst.getBottomEdge() < down)

Hero is ABOVE Obstacle (obst.getTopEdge() > down + height)

to be added to Obstacle class:

    public Integer getLeftEdge() {
        return whatever_the_left_edge_of_the_obstacle_is;
    } // end of getLeftEdge()

    public Integer getRightEdge() {
        return whatever_the_right_edge_of_the_obstacle_is;
    } // end of getRightEdge()

    public Integer getTopEdge() {
        // return ....
    } // end of getTopEdge()

    public Integer getBottomEdge() {
        // return ....
    } // end of getBottomEdge()

in MUPanel.java:

    for (Integer index = 0; index < obstacleArray.length; index++) {

        if ( hero.isTouchingObstacle( obstacleArray[index] ) ) {

            // do something with or to obstacleArray[index]
            // or
            // do something with or to hero

        } // end if

    } // end for

to be added to Hero class:

to be added to Obstacle class:

in MUPanel.java:

for (Integer index = 0; index < obstacleArray.length; index++) { if ( hero.isTouchingObstacle( obstacleArray[index] ) ) { // do something with or to obstacleArray[index] // or // do something with or to hero } // end if } // end for