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POArrayList element swapping not permanent
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  1. POArrayList element swapping not permanent
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    copied!<p>I have an arraylist of playing cards.</p> <pre><code>private ArrayList&lt;VisibleCard&gt; m_vecCards; </code></pre> <p>It has a private scope however upon accessing its members via:</p> <pre><code>public VisibleCard getCard(int n) { return this.m_vecCards.get(n); } </code></pre> <p>I find that the elements are unsorted via the bubble sort algorithm:</p> <pre><code>public void sortCards() { int swapCounter, nIndex; int upperBound = this.m_vecCards.size() - 1; while(true) { swapCounter = 0; for ( nIndex = 0; nIndex &lt; upperBound; nIndex++ ) { if ( this.m_vecCards.get(nIndex).getNumericVal() &gt; this.m_vecCards.get(nIndex + 1).getNumericVal() ) { Collections.swap(this.m_vecCards, nIndex, nIndex + 1); swapCounter++; } } if ( swapCounter == 0 ) { for ( nIndex = 0; nIndex &lt; 7; nIndex++ ) { Log.d("order", ""+ this.m_vecCards.get(nIndex).getNumericVal()); } return; } } } </code></pre> <p>I have a log function I can use to test the numbers to ensure my arrays are being sorted and it is the case that the array is being sorted, the results however are not permanent.</p> <pre><code>12-18 06:51:08.077: D/order(3636): 2 12-18 06:51:08.077: D/order(3636): 4 12-18 06:51:08.077: D/order(3636): 5 12-18 06:51:08.077: D/order(3636): 8 12-18 06:51:08.077: D/order(3636): 8 12-18 06:51:08.077: D/order(3636): 9 12-18 06:51:08.077: D/order(3636): 9 12-18 06:51:08.087: D/order(3636): 1 12-18 06:51:08.087: D/order(3636): 5 12-18 06:51:08.087: D/order(3636): 6 12-18 06:51:08.087: D/order(3636): 8 12-18 06:51:08.087: D/order(3636): 12 12-18 06:51:08.087: D/order(3636): 12 12-18 06:51:08.087: D/order(3636): 13 12-18 06:51:08.087: D/order(3636): 1 12-18 06:51:08.087: D/order(3636): 1 12-18 06:51:08.087: D/order(3636): 2 12-18 06:51:08.087: D/order(3636): 3 12-18 06:51:08.087: D/order(3636): 3 12-18 06:51:08.087: D/order(3636): 10 12-18 06:51:08.087: D/order(3636): 10 12-18 06:51:08.087: D/order(3636): 4 12-18 06:51:08.097: D/order(3636): 6 12-18 06:51:08.097: D/order(3636): 6 12-18 06:51:08.097: D/order(3636): 9 12-18 06:51:08.097: D/order(3636): 10 12-18 06:51:08.097: D/order(3636): 11 12-18 06:51:08.097: D/order(3636): 13 </code></pre> <p>Essentially the elements within the ArrayList are not being swapped "permanently" as I would like. I cannot understand this phenomena as I see nothing wrong with the code or the log debugging.</p> <pre><code>public void addCard(VisibleCard vc) { if ( this.m_humanAgent ) { vc.setPosition(-20, (this.m_vecCards.size() * 85) + 100); vc.rotate(1.57079633); vc.setup(); } this.m_vecCards.add(vc); if ( this.m_vecCards.size() == 7 ) { this.sortCards(); } } </code></pre> <p>I am adding a total of seven cards for each player and after seven elements exist within the array, I invoke the sortCards() method but after outputting the cards, they do not appear in the order they ought to.</p> <p>I render the output like this:</p> <pre><code> for ( int n = 0; n &lt; 7; n++ ) { this.m_flushRummy.getPlayer(0).getCard(n).draw(gl, m_bmTextureIds[0]); } </code></pre>
 

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