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POFinding Connected Components and reading an adjacency matrix
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  1. POFinding Connected Components and reading an adjacency matrix
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    copied!<p>This is actually my first post here. I wasn't aware of this website, and I lurked around the questions and its certainly a place I want to keep coming to.</p> <p>I'm in my Senior year for Computer Science but my programming skills are not that good, which makes me feel very disappointed in myself. </p> <p>Anyways, I have a project due on Friday and I've been working on it since Saturday and I keep bashing my head making no progress.</p> <p>I need to find the connected components in a graph and also read from a file an adjacency matrix.</p> <p>I first tried in in python, using an igraph python library but I just kept having system errors. So after two days of trying to troubleshoot that, I gave up and moved onto Java where I'm trying to read the array.</p> <p>Here is my current code that I have thus far, and I'm trying to google the best I can to find the answer. Right now I'm simply trying to read from a file and put the values into my 2d array. I commented out most of everything because I'm trying to simply figure out what I'm doing wrong.</p> <pre><code>package javaapplication1; import java.io.*; import java.util.Scanner; import tio.*; public class JavaApplication1 { public static void adjMatrix() throws FileNotFoundException, IOException{ int i, j, n = 20; int[][]array = new int[n][n]; String file = ("adjmatrix.txt"); BufferedReader in = new BufferedReader(new FileReader(file)); System.out.println(in.readLine()); in.close(); /* while(in.hasMoreElements()){ for (i = 0; i &lt; n; i++){ for (j = 0; j &lt; n; j++){ array[i][j] = in.readInt(); } // end inner for } // end outer for } //Print array System.out.println("Here is the matrix: "); for (i = 0; i &lt; n; i++){ for (j = 0; j &lt; n; j++){ System.out.print(array[i][j]); } // end innerfor } //end outerfor */ } // endclass /** * @param args the command line arguments */ public static void main(String[] args) throws IOException{ adjMatrix(); } // end main } // end class </code></pre> # <p>ERROR: Exception in thread "main" java.io.FileNotFoundException: adjmatrix.txt </p> <p>(The system cannot find the file specified) at java.io.FileInputStream.open(Native Method) at java.io.FileInputStream.(FileInputStream.java:138) at java.io.FileInputStream.(FileInputStream.java:97) at java.io.FileReader.(FileReader.java:58) at javaapplication1.JavaApplication1.adjMatrix(JavaApplication1.java:26) at javaapplication1.JavaApplication1.main(JavaApplication1.java:60) Java Result: 1 BUILD SUCCESSFUL (total time: 0 seconds)</p> #
 

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