Inheritance method calling - Java

Question

I have a method in a class that sets "Position X" and "Position Y".

public class Player {

    int positionX, postinionY;

    public void setPosition (int position_X, int position_Y)
    {
         positionX = position_X;
         postinionY = position_Y;
    }

}

I have another class "World" that has an array in it called grid. I have to use the values of position x and y from Player to get location from the grid.

public class World extends Player {
    int [] [] grid = new int [16] [16];

    public int getLocationID (int x, int y)
    {
        return grid [x][y];
    }
}

I need help to take Position x,y(Player) and use them instead x,y (World)

What do you mean? And what is the logic behind World inheriting Player?? — darijan
– darijan, Commented Mar 15, 2012 at 11:57

Andreas Dolk · Accepted Answer · 2012-03-15 12:07:22Z

5

You could add another method to World get the own (the players) location id:

public int getPlayerLocationID() {
    return grid[positionX][positionY];
}

But - honestly - in what kind of universum we have a relation "a world is-a player"? In all universums that I know (Ok, only one, actually), we usually have "a world has-many players".

edited Mar 15, 2012 at 12:07

answered Mar 15, 2012 at 11:56

Andreas Dolk

115k20 gold badges185 silver badges275 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

GETah · Accepted Answer · 2012-03-15 12:20:18Z

0

This method should do what you want.

public class World extends Player {
    int [] [] grid = new int [16] [16];
    public int getPlayerID (int locationX, int locationY)
    {
        if((locationX>15)||(locationX>16))
            throw new InvalidArgumentException("Player locations should be less than 16!");
        return grid [locationX][locationY];
    }
}

Note that it will throw an exception in case the arguments provided are not valid.

answered Mar 15, 2012 at 12:20

GETah

21.5k7 gold badges67 silver badges110 bronze badges

Collectives™ on Stack Overflow

Inheritance method calling - Java

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related