How to create Next() method in an Object class

Question

I have a class called Tile that has the follow methods:

public Tile(Shape tile, Color color, int position), getTile(),

setTile(), getColor(), setColor(), getPosition(), setPosition()

Now using for(Tile item: tiles) I want to have a item.Next() that will move to the next index.

Btw tiles is List<Tile> tiles = new ArrayList<Tile> contains all the tiles, color and position.

So my question is how do I implement Next() in the Tile class? I can't do item++ since its of type Tile, etc.

Thanks for the help.

Note my Tile class and ArrayList tiles is located in different files

How can tiles include all the tiles if it is List<String> tiles = new ArrayList<String>(). Shouldn't it be List<Tile> tiles = new ArrayList<Tile>();? If you change tiles to be that you can simple do for(Tile tile: files) { tile.setColor(color); } or whatever you have to do. — Philipp
– Philipp, Commented Mar 24, 2016 at 4:33

Narendran Solai Sridharan · Accepted Answer · 2016-03-24 04:30:57Z

2

For loop also does the required as the below code,

List<Tile> tiles = new ArrayList<Tile>();
Iterator<Tile> tileIterator= tiles.iterator();
while (tileIterator.hasNext()) {
     Tile tile = tileIterator.next();
     tile.setColor("green");
}

answered Mar 24, 2016 at 4:30

Narendran Solai Sridharan

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Comments

Thush-Fdo · Accepted Answer · 2016-03-24 07:51:49Z

1

You simply put it in to an iterator.

    Iterator<Tile> tileIterator= tiles.iterator();
    while (tileIterator.hasNext()) {
        System.out.println(tileIterator.next());
    }

Edit

Change your

    List<String> tiles = new ArrayList<String>

to

    List<Tile> tiles = new ArrayList<Tile>();

Then add the "tiles" items to this list. Then use below code

   Iterator<Tile> tileIterator = tiles.iterator();

    Tile t;
    while (tileIterator.hasNext()) {
        t = tileIterator.next();
        System.out.println(t.getColor().toString());
        t.setColor(your_color);
        System.out.println(t.getColor().toString());
    }

Note

Once you get the tile object to t you can use any method in the class Tile by using the t object.

edited Mar 24, 2016 at 7:51

answered Mar 24, 2016 at 4:09

Thush-Fdo

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3 Comments

evgeni mironov Over a year ago

What If I want to access at the same setColor() method from tile, how do I use it with the iterator? tileIterator.setColor() wouldnt work

Thush-Fdo Over a year ago

@evgeni-mironov: Try the edit section and see. You should add you tiles objects to the List using tiles.add(your_tile_object)

evgeni mironov Over a year ago

the Tiles was actually already a type <Tile>, my bad about that, your way works. Thanks a lot for the help

Benoit Vanalderweireldt · Accepted Answer · 2016-03-24 03:57:16Z

0

You need to implement Iterable, source, then you'll be able to use your class in a "for-each-loop".

answered Mar 24, 2016 at 3:57

Benoit Vanalderweireldt

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1 Comment

evgeni mironov Over a year ago

I thought about iterator, but I how do i access setColor() with iterator , because I need to set a tile to a color

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