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Thread: What's wrong with my java code?

  1. #1
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    Default What's wrong with my java code?

    Hi, I'm working on a java program that reads two files, stores the data in two TreeMaps and the I will compare the keys and values of both TreeMaps and perform some operations. The problem I'm having is there's no output file when I try to save my data??? On my computer screen I can see the keys and values of both TreeMap, what's wrong with my code?

    Any help is deeply appreciated. Thank you in advance.
    P.S. I'm not a programmer but a student


    import java.util.*;
    import java.io.*;
    import java.lang.*;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    import java.io.FileNotFoundException;

    public class MyDataScanner2a {

    private static void readFiles(String fileName1, String fileName2) {
    try {
    Scanner scanner = new Scanner(new File(fileName1));
    Scanner scanner2 = new Scanner(new File(fileName2));
    scanner.useDelimiter(System.getProperty("line.sepa rator"));
    scanner2.useDelimiter(System.getProperty("line.sep arator"));
    while (scanner.hasNext()) {
    createTreeMaps(scanner.next(), 1);
    }
    while (scanner2.hasNext()) {
    createTreeMaps(scanner2.next(), 2);
    }
    scanner.close();
    scanner2.close();
    } catch (Exception e) {
    e.printStackTrace();
    }
    }

    public static void createTreeMaps(String line, int i) {
    TreeMap<String, Double> treeMap = new TreeMap<String,Double>(); //a
    TreeMap<String, Double> treeMap2 = new TreeMap<String,Double>(); //a
    if (i==1) {
    //System.out.println("line: "+line);
    Scanner lineScanner = new Scanner(line);
    lineScanner.useDelimiter("\\t");
    String div = lineScanner.next();
    String eeN = lineScanner.next();
    double hrs = lineScanner.nextDouble();
    System.out.println("hours worked: \t\t"+hrs);
    //TreeMap<String, Double> treeMap = new TreeMap<String,Double>();
    if (!treeMap.containsKey(eeN)) {
    treeMap.put(div+"\t"+eeN, hrs);
    }
    /*for (Map.Entry<String, Double> entry : treeMap.entrySet()) {
    System.out.println("Key: " + entry.getKey() + "\tValue: " + entry.getValue());
    }*/
    } else {
    //System.out.println("line: "+line);
    Scanner lineScanner = new Scanner(line);
    lineScanner.useDelimiter("\\t\\$");
    String str = lineScanner.next();
    double deds = lineScanner.nextDouble();
    System.out.println("deduction: \t\t"+deds);
    //TreeMap<String, Double> treeMap2 = new TreeMap<String,Double>();
    if (!treeMap2.containsKey(str)) {
    treeMap2.put(str, deds);
    }
    /*for (Map.Entry<String, Double> entry : treeMap2.entrySet()) {
    System.out.println("Key: " + entry.getKey() + "\tValue: " + entry.getValue());
    }*/
    }
    }
    BufferedWriter out = null;
    String outFile = "C:/Deds.txt";


    public void myMethod (TreeMap<String, Double> treeMap, TreeMap<String, Double> treeMap2) {
    /*TreeMap<String, Double> hours = new TreeMap<String,Double>();
    hours.putAll(treeMap);
    for (Map.Entry<String, Double> entry : treeMap.entrySet()) {
    //System.out.println("Key: " + entry.getKey() + "\tValue: " + entry.getValue());
    }

    for (Map.Entry<String, Double> entry : treeMap2.entrySet()) {
    //System.out.println("Key: " + entry.getKey() + "\tValue: " + entry.getValue());
    }*/


    try {

    File fout = new File (outFile);
    FileOutputStream fos = new FileOutputStream(fout); //Open output stream
    out = new BufferedWriter(new OutputStreamWriter(fos));

    for (Map.Entry<String, Double> entry : treeMap.entrySet()) {
    System.out.println("eeData: " + entry.getKey() + "\tAmount: " + entry.getValue());
    out.write(entry.getKey() + "\t" + entry.getValue());
    out.newLine();
    }
    } catch( IOException e ) {
    e.printStackTrace();
    } finally {
    try {
    // attempt the close the output file
    out.close();
    } catch( IOException ex ) {
    ex.printStackTrace();
    }
    }

    } // end of my Method

    public static void main(String[] args) {
    String option = "y";
    while (option.equals("y") | option.equals("Y")) {
    Console console = System.console();
    String inString1 = "C:/console.readLine("\nEnter input file 1: ")+".txt";
    String inString2 = "C:/console.readLine("Enter input file 2: ")+".txt";
    System.out.println();
    readFiles(inString1, inString2);
    option = console.readLine("\nContinue (y/n) ? : ");
    System.out.println();
    }
    }
    }


  2. #2
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    Default Re: What's wrong with my java code?

    Quote Originally Posted by mjmz View Post
    String inString1 = "C:/console.readLine("\nEnter input file 1: ")+".txt";
    String inString2 = "C:/console.readLine("Enter input file 2: ")+".txt";
    What the heck are you trying to do here?
    Need Java help? Check out the HotJoe Java Help forums!

  3. #3
    Banned
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    Default Re: What's wrong with my java code?

    Your literals are being ended prematurely by the ""

    Also, what are you doing? There's no file with that name!

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