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POJava arraylist - Check if the two items in arraylist index are set while generating random ints from list?
 

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  1. POJava arraylist - Check if the two items in arraylist index are set while generating random ints from list?
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    <p>My coordinates list:</p> <pre><code> int[][] coords = { {3093, 3630 }, {3095, 3632}, {3098, 3633}, {3101, 3633 }, {3104, 3631}, {3106, 3629}, {3107, 3627}, {3108, 3624}, {3109, 3620}, {3108, 3617}, {3106, 3614}, {3102, 3613}, {3099, 3613}, {3097, 3613}, {3093, 3614}, {3090, 3617}, {3087, 3619} }; </code></pre> <p>Generation part:</p> <pre><code> int random = Misc.random(coords.length - 1); handler.move(coords[random][0], coords[random][1], 0); </code></pre> <p>Basically what I am trying to do, if these coordinates are already taken, then re-generate the coords.</p> <ol> <li>I can't really store these coords into a big arraylist, because I don't always want this feature to function, for example if I have more players than the items in the coords[] array, then this won't be activated.</li> </ol> <p>Therefore I created a arraylist of used coords, and this is my logic on how to do this:</p> <pre><code> int[][] coords = { {3093, 3630 }, {3095, 3632}, {3098, 3633}, {3101, 3633 }, {3104, 3631}, {3106, 3629}, {3107, 3627}, {3108, 3624}, {3109, 3620}, {3108, 3617}, {3106, 3614}, {3102, 3613}, {3099, 3613}, {3097, 3613}, {3093, 3614}, {3090, 3617}, {3087, 3619} }; ArrayList&lt;Integer&gt; coordinates = new ArrayList&lt;Integer&gt;(); int random = Misc.random(coords.length - 1); if (getPlayersCount() &lt; coords.length) { if (coordinates.contains(coords[random][0], coords[random][1])) { random = Misc.random(coords.length - 1); } else { handler.move(coords[random][0], coords[random][1], 0); coords.add(coords[random][0], coords[random][1]); } } else { random = Misc.random(coords.length - 1); handler.move(coords[random][0], coords[random][1], 0); } </code></pre> <p>Basically, if there are less players than the array length, process. If coordinates arraylist contains generated X, Y, regenerate it, else move player and add the coords to the list.</p> <p>But it seems like I did something wrong, as I get this error: <code>error: no suitable method found for contains(int,int)</code></p> <p><em><strong>How can I do this?</em></strong></p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJunatanm Degraded
    1. USJunatanm Degraded
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COIt would make your life easier to create a `class Coordinate { int lat; int long;}` and use it instead of `int[]`...
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      1. POJava arraylist - Check if the two items in arraylist index are set while generating random ints from list?
      1. USassylias
    2. CO`contains` compares the `Object` you are passing with the `Object`s already in the list. This is done by using the `Object`s `equals` method. Your list contains arrays of `int`. While I'm sure there's some way to do it, I would be probably use something like `java.awt.Point` or make my own `Point` class and override it's `equals` method to compare the coordinates
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      1. POJava arraylist - Check if the two items in arraylist index are set while generating random ints from list?
      1. USMadProgrammer
    3. CO@assylias You should extend that concept into an answer
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      1. POJava arraylist - Check if the two items in arraylist index are set while generating random ints from list?
      1. USMadProgrammer
 

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