import java.io.*;import Apriori;public class DemoApriori{  public static void main( String [] args ) throws IOException  {    if( args.length < 3 )    {      System.err.println("<datafilename> <int support> <float confidence>");      System.exit(1);    }    Apriori apriori = new Apriori();    String inputFileName = args[0];    int minSup = Integer.parseInt(args[1]);    float minConf = Float.parseFloat(args[2]);        System.err.println(inputFileName+" "+minSup+" "+minConf);    printRules( apriori.go( getInput(inputFileName), minSup, minConf ) );  }  //  // Print out the rules  //  private static void printRules( RuleSet ruleSet )  {    Object o[] = ruleSet.toArray();    for(int i=0; i<o.length; i++)    {      Rule rule = (Rule)o[i];      System.out.print( "Rule:");      System.out.print( translate(rule.getLhs()) );      System.out.print( "==>" );      System.out.print( translate(rule.getRhs()) );      System.out.print( " (confidence="+rule.getConfidence() );      System.out.println( " support="+rule.getSupport()+")");    }  }  //  // Translate the integers into their column headings  //  private static String translate( ItemSet s )  {    String outStr = new String();    Object o[] = s.toArray();    for(int i=0; i<o.length; i++)    {      Integer x = (Integer)o[i];      outStr = new String(outStr + translateElement(x));      if( i != (o.length-1) )        outStr = new String(outStr + " and ");    }     return outStr;  }  //  // Determine column heading by int value  //  public static String translateElement(Integer i)  {    String outStr;    if( i.compareTo(new Integer(20000)) < 0 ) // i < 20000      outStr=new String("origin="+(i.intValue()-10000));    else    if( i.compareTo(new Integer(30000)) < 0 ) // i < 30000      outStr=new String("cylinders="+(i.intValue()-20000));    else    if( i.compareTo(new Integer(40000)) < 0 ) // i < 40000      outStr=new String("mpg="+(i.intValue()-30000));    else    if( i.compareTo(new Integer(50000)) < 0 ) // i < 50000      outStr=new String("acceleration="+(i.intValue()-40000));    else    if( i.compareTo(new Integer(60000)) < 0 ) // i < 60000      outStr=new String("modelyear="+(i.intValue()-50000));    else    if( i.compareTo(new Integer(70000)) < 0 ) // i < 70000      outStr=new String("displacement="+(i.intValue()-60000));    else    if( i.compareTo(new Integer(80000)) < 0 ) // i < 80000      outStr=new String("horsepower="+(i.intValue()-70000));    else    if( i.compareTo(new Integer(90000)) < 0 ) // i < 90000      outStr=new String("weight="+(i.intValue()-80000));    else      outStr=new String("catchall="+i);      return outStr;          }  //  // Read text file into ItemSets  //  private static ItemSet getInput(String name) throws IOException  {    ItemSet set = new ItemSet();        try    {      File file = new File(name);      FileReader is = new FileReader(file);      Reader r = new BufferedReader(is);      StreamTokenizer st = new StreamTokenizer(r);      st.eolIsSignificant(true);      st.nextToken();      while( st.ttype != st.TT_EOF )      {        ItemSet s = new ItemSet();        int k=1;        while( st.ttype != st.TT_EOL )        {          s.add(new Integer((int)st.nval+k*10000));          st.nextToken();          k++;        }        set.add(s);        st.nextToken();      }    }    catch ( IOException e )    {      System.err.println(e.toString());      System.exit(1);    }  return set;  }}