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POReading Data from Multiple txt Files in Java
 

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  1. POReading Data from Multiple txt Files in Java
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    <p>I'm a beginner taking Intro to Computer Science and I'm working with java. I get the following error in this program when trying to read from multiple txt files in the getLetterGrade method:</p> <p>Exception in thread "main" java.lang.IllegalStateException: Scanner closed</p> <pre><code>import java.util.Scanner; import java.io.*; public class Exam { private int grade; private float examAvg; private String name; private File exam1Data; private File exam2Data; private File namesData; private Scanner inFileExam1; private Scanner inFileExam2; private Scanner inFileName; //constructor public Exam() throws IOException { exam1Data = new File("exam1.txt"); exam2Data = new File("exam2.txt"); namesData = new File("names.txt"); inFileExam1 = new Scanner(exam1Data); inFileExam2 = new Scanner(exam2Data); inFileName = new Scanner(namesData); } public float getExam1Avg() { examAvg = 0; while (inFileExam1.hasNext()) { grade = inFileExam1.nextInt(); examAvg += grade; } inFileExam1.close(); examAvg = (float)(examAvg / 25.0); return examAvg; } public float getExam2Avg() { examAvg = 0; while (inFileExam2.hasNext()) { grade = inFileExam2.nextInt(); examAvg += grade; } inFileExam2.close(); examAvg = (float)(examAvg / 25.0); return examAvg; } //method that finds the letter grade given a student name and //the exam number public char getLetterGrade(String inputName, int examNum) { char letter; int count = 1; //inputName = inputName.toLowerCase(); do { if (inFileName.hasNext()){ name = inFileName.nextLine(); } count++; } while (inFileName.hasNext() &amp;&amp; !name.equalsIgnoreCase(inputName)); inFileName.close(); if (!name.equalsIgnoreCase(inputName)) { return 'x'; } if (examNum == 1) { for (int i = 1; i &lt;= count &amp;&amp; inFileExam1.hasNextInt(); i++) { grade = inFileExam1.nextInt(); } inFileExam1.close(); } else if (examNum == 2) { for (int i = 1; i &lt;= count &amp;&amp; inFileExam2.hasNextInt(); i++) { grade = inFileExam2.nextInt(); } inFileExam2.close(); } else { return 'x'; } if (grade &gt;= 90) { letter = 'A'; } else if (grade &lt; 90 &amp;&amp; grade &gt;= 80) { letter = 'B'; } else if (grade &lt; 80 &amp;&amp; grade &gt;= 70) { letter = 'C'; } else if (grade &lt; 70 &amp;&amp; grade &gt;= 60) { letter = 'D'; } else { letter = 'F'; } return letter; } } </code></pre> <p>The error occurs at the following line:</p> <pre><code>for (int i = 1; i &lt;= count &amp;&amp; inFileExam1.hasNextInt(); i++) { </code></pre> <p>Please help!!</p> <p>Here is the main class:</p> <pre><code>import java.util.Scanner; import java.io.*; public class ExamAverages { public static void main(String[] args) throws IOException { Exam exam = new Exam(); System.out.println(exam.getExam1Avg()); System.out.println(exam.getExam2Avg()); System.out.println(exam.getLetterGrade("name", 1)); } </code></pre>
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      1. VTUpMod
    1. COWhat is the data in the two `inFileExam*` files?
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      1. USJon
    2. COexam1.txt data: 67 56 90 77 45 87 23 12 87 89 96 44 55 66 22 88 99 77 59 100 2 47 60 8 81 exam2.txt data: 76 34 11 77 44 33 77 88 97 65 79 71 72 45 54 68 32 83 49 88 79 81 93 58 75 All numbers are written on separate lines btw.. don't know if that matters.
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      1. USmoravec
    3. CODude, you are just making your post more complicated and unreadable.. stick to the main problem
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