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POJava Try and Catch IOException Problem
 

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  1. POJava Try and Catch IOException Problem
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    <p>I am trying to use a bit of code I found at the bottom of <a href="https://stackoverflow.com/questions/453018/number-of-lines-in-a-file-in-java">this page</a>. Here is the code in a class that I created for it:</p> <pre><code>import java.io.LineNumberReader; import java.io.FileReader; import java.io.IOException; public class LineCounter { public static int countLines(String filename) throws IOException { LineNumberReader reader = new LineNumberReader(new FileReader(filename)); int cnt = 0; String lineRead = ""; while ((lineRead = reader.readLine()) != null) {} cnt = reader.getLineNumber(); reader.close(); return cnt; } } </code></pre> <p><strong>My objective is to count the lines of a text file, store that number as an integer, then use that integer in my main class.</strong> In my main class I tried a few different ways of making this happen, but (being a new programmer) I am missing something. Here is the first thing I tried:</p> <pre><code>String sFileName = "MyTextFile.txt"; private int lineCount = LineCounter.countLines(sFileName); </code></pre> <p>With this attempt I get the error "unreported exception java.io.IOException; must be caught or declared to be thrown." I don't understand why I am getting this because as I can see the exception is declared in my "countLines" method. I tried to use a try catch block right under that last bit of code I posted, but that didn't work either (I don't think I did it right though). Here is my try catch attempt:</p> <pre><code>String sFileName = "MyTextFile.txt"; private int lineCount;{ try{ LineCounter.countLines(sFileName); } catch(IOException ex){ System.out.println (ex.toString()); System.out.println("Could not find file " + sFileName); } } </code></pre> <p>Please show me the way! Thanks in advance for your help!</p>
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