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POTaking string and putting it into an array Java
 

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  1. POTaking string and putting it into an array Java
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    <p>I am making a java program that will Use “brute force” by generating all possible permutations and checking if any are matching. Example: If G1 = “0-1 0-2 1-2 1-3 2-3” and G2 = “1-3 2-0 0-3 1-2 1-0” then the permutation 0123 → 2310 does not match, but 0123 → 2013 does match.</p> <p>I need to make a graph class the represents the graph as a 2-D boolean array and has member functions to check if 2 vertices are an edge and to print a graph. The constructor should use the above string representing a list of edges. </p> <p>I need to know how I would take the string in that format and put it in an array. </p> <p>Overall, I want to find out if the two graphs are isomorphic. </p> <p>The code below is the permutation generator. </p> <pre><code>// Generator of all permutations of: 0,1,2,...,n-1 public class PermutationGenerator { // private data private int[] perm; private boolean first; // constructor public PermutationGenerator (int n) { perm = new int [n]; first = true; } public int[] next () { int n = perm.length; // starting permutation: 0 1 2 3 ... n-1 if (first) { first = false; for (int i = 0 ; i &lt; n ; i++) perm [i] = i; return perm; } // construct the next permutation // find largest k so that perm[k] &lt; perm[k+1]; if none, finish int i, j, k, l; for (k = n - 2 ; k &gt;= 0 &amp;&amp; perm [k] &gt;= perm [k + 1] ; k--) ; if (k &lt; 0) return null; // no more // find largest l so that perm[k] &lt; perm[l] for (l = n - 1 ; l &gt;= 0 &amp;&amp; perm [k] &gt;= perm [l] ; l--) ; // swap perm[k] and perm[l] swap (perm, k, l); // reverse perm[k+1]...perm[n-1] for (i = k + 1, j = n - 1 ; i &lt; j ; i++, j--) swap (perm, i, j); return perm; } // swap a[i] and a[j] private static void swap (int a[], int i, int j) { int temp = a [i]; a [i] = a [j]; a [j] = temp; } </code></pre> <p>}</p>
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    1. USJoe24
    1. USJoe24
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    1. COWhy do you need both `G1` and `G2`? Wouldn't just one suffice?
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      1. USirrelephant
    2. COWait so you are trying to determine if the graph "G1" is the same as the graph "G2"?
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      1. USarshajii
    3. COWhat's your question?
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      1. USDmitri
 

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