Week 3 - Memory Model Review

Java Program

public class Hockey {
    public static void main (String[] args) {
        Skater helen = new Skater (5, "blue");
        Goalie brenda = new Goalie (29, "red");
        helen.scoreGoal (brenda);
        (new Skater(55,"green")).scoreGoal(brenda);
        int total = helen.getGoals();
        System.out.println ("Goals by Helen: " + total);
    }
}
class Skater {
    private int num;
    private String team;
    private int goals;

    public Skater (int number, String teamname) {
        num = number;
        team = teamname;
    }
    public void scoreGoal (Goalie goalie) {
        goals++;
        goalie.recordGoal();
    }
    public int getGoals() {
        return goals;
    }
}
class Goalie {
    private int num;
    private String team;
    private int goalsAgainst;

    public Goalie (int mynum, String myteam) {
        num = mynum;
        team = myteam;
    }
    public void recordGoal() {
        goalsAgainst++;
    }
}

Memory Model

Show what happens in memory...