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Thread: core java

  1. #1
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    Default core java

    help me. i have error in this code...
    import java.io.*;
    import java.util.*;
    import java.applet.Applet;
    import java.awt.Font;
    import java.awt.Color;
    import java.awt.Graphics;
    import java.awt.event.*;
    import java.net.*;
    import java.awt.Canvas;
    import java.awt.Button;
    import java.awt.TextField;
    import java.awt.Panel;
    import java.awt.Label;
    import java.awt.Scrollbar;
    import java.awt.Choice;
    import java.awt.BorderLayout;
    import java.awt.GridLayout;
    import java.awt.Event;
     
     
    class showResult extends Canvas{
      static private Integer minSupportCount = new Integer("2");
      public showResult(){
      }
     
      public void paint(Graphics page){
          this.setBackground(Color.white);
          AprioriProcess(page);
      }
     
      static public void setMinSupportCount(Integer count){
        minSupportCount=count;
      }
     
      static public int getMinSupportCount(){
        return minSupportCount.intValue();
      }
      /**
       * This Generates the Apriori Tables and paints an Applet also
       * Prints the Output in System.out.
       */
      public static void AprioriProcess(Graphics page){
       //Assuming an Minimum Support Count of 2.
        //Integer minSupportCount = new Integer("2");
       //List containing a Map of Candidate Item Sets.
        List CList = new ArrayList();
       //List containing a Map of Large Item Sets.
        List LList = new ArrayList();
       //Input List where each line of input is an entry in this List as a String();
        List input = new ArrayList();
       //Generation of First Candidate Itemset and Large Item Set since the process
       //of creating them is different than the others
       SortedMap C1 = new TreeMap();
       SortedMap L1 = new TreeMap();
       int iterationCount=0;
       java.util.SortedMap tempMap = new TreeMap();
       String buffer,output=new String();
       int count=0;
       boolean goOn=true;
       //Reading the input file and creating first candidate Item set Map.
       //Keys are items. Value is "" in the Map.
       try{
            //FileReader fr = new FileReader("input.txt");
            URL dat_url;
            dat_url = new URL("http://www.cs.wmich.edu/~yang/tlt/cs603/Sujatha/input.txt");
    	//BufferedReader in = new BufferedReader(new InputStreamReader(dat_url.openStream()));
    	//BufferedReader br = new BufferedReader(fr);
            BufferedReader br = new BufferedReader(new InputStreamReader(dat_url.openStream()));
    	while((buffer=br.readLine())!=null){
              StringTokenizer st = new StringTokenizer(buffer,",");
              while(st.hasMoreTokens()){
                C1.put(st.nextToken(),"");
              }
              input.add(buffer);
    	}
            //fr.close();
       }catch (IOException e){
        System.out.println("input.txt cannot be opened" );
       }
       //Filling up the values in the Map.
       for(Iterator Iter=C1.keySet().iterator(); Iter.hasNext();){
         count=0;
         String key=(String)Iter.next();
         for(Iterator iter=input.iterator();iter.hasNext();){
           String line= (String)iter.next();
           StringTokenizer st2 = new StringTokenizer(line,",");
           while(st2.hasMoreElements()){
             if( key.equalsIgnoreCase(st2.nextToken()) ){
               count++;
             }
           }
           Integer c = new Integer(count);
           C1.put(key,c);
         }
       }
       CList.add(C1);
       LList.add(generateLMap(C1,minSupportCount));
       //End formation of C1 and L1.
       //Generic Apriori Algorithm.
       System.out.println("---------------------------");
       System.out.println("       Generated Output    ");
       System.out.println("---------------------------");
       while(goOn){
        SortedMap keyMap = new TreeMap();
        //Assuming the Previous Large item set is next Candidate Set
        //check for subsets and add it into candidate set Map.
        SortedMap CMap=(TreeMap)LList.get(iterationCount);
        //this is just for printing purposes.
        SortedMap CMap1=(TreeMap)CList.get(iterationCount);
     
        //Printing the output
        System.out.println("Candidate Set "+(iterationCount+1));
        for(Iterator i=CMap1.keySet().iterator();i.hasNext();){
          String key= (String)i.next();
          System.out.println(key+":"+CMap1.get(key));
        }
        System.out.println("Large Item Set "+(iterationCount+1));
        for(Iterator i=CMap.keySet().iterator();i.hasNext();){
          String key= (String)i.next();
          System.out.println(key+":"+CMap.get(key));
        }
        //end Printing.
        //Create an array of Strings from each entry in candidate item set which is
        //previous Large item set.
        //Take each item in the array compare with remaining item to see the entries are same
        //except the last one.
        //If they are same join them and add to temp KeyMap by getting the count of the item set entry.
        Object[] arr= CMap.keySet().toArray();
        for(int i=0;i<=arr.length;i++){
          for(int j=i+1;j<arr.length;j++){
            String arr1=(String)arr[i];
            String arr2=(String)arr[j];
            if(iterationCount>=1){
              String temp = arr1.substring(0,arr1.lastIndexOf(","));
              String temp2 = arr2.substring(0,arr2.lastIndexOf(","));
              if(temp.equalsIgnoreCase(temp2)){
                  String key =temp+arr1.substring(arr1.lastIndexOf(","),arr1.length())+arr2.substring(arr2.lastIndexOf(","),arr2.length());
                  if(isSubSetsPresent(key,CMap))
                    keyMap.put(key,getCount(input,key));
              }
            }else{
                String key =(String)arr[i]+","+(String)arr[j];
                keyMap.put(key,getCount(input,key));
            }
          }
        }
        //while loop continues until Large Item set is empty.
        if(!keyMap.isEmpty()){
          CList.add(keyMap);
          LList.add(generateLMap(keyMap,minSupportCount));
          iterationCount++;
        }else{
          goOn=false;
        }
       }
       //end While
       System.out.println("---------------------------");
       System.out.println("       Ends here           ");
       System.out.println("---------------------------");
       //Prints the Maps and Illustrates the Process in the Applet.
       printMaps(CList,LList,input,page,minSupportCount.intValue());
      }
     
      static void printMaps(List CList,List LList,List input,Graphics page,int minSupportCount){
        int drawcount=1,drawcount2=0;
        SortedMap CMap1 = (SortedMap)CList.get(1);
        page.setColor(new Color(255,255,255));
        page.fill3DRect(0,0,3000,3000,false);
        page.setColor(new Color(0,0,0));
        //page.drawString("Transactional Database D",20,15);
        /**
         * ILLUSTRATION TABLE
         */
        //Draw Transactional Database
        page.setColor(new Color(192,192,192));
        page.fill3DRect(30,30,80,input.size()*20+30,true);
        page.setColor(new Color(0,0,0));
        page.drawRect(30,30,80,20);
        page.drawRect(30,50,80,input.size()*20+10);
        page.setColor(new Color(0,0,0));
        page.setFont(new Font("Arial", Font.PLAIN, 10));
        page.drawString("List of Items",30+2,50-2);
        for(Iterator i=input.iterator();i.hasNext();){
          drawcount++;
          page.drawString(" "+(String)i.next(),30,drawcount*20+30);
        }
     
        //Arrow Lines
        page.drawString("Generate Candidates",140,(input.size()*20+30)/2-15);
        page.drawString("from Database D",150,(input.size()*20+30)/2+10);
        page.setFont(new Font("Arial", Font.PLAIN, 15));
        page.drawString("- - - - - - - - - - - - - - -",120,(input.size()*20+30)/2);
        page.setFont(new Font("Arial", Font.PLAIN, 20));
        page.drawString(">",240,(input.size()*20+30)/2+3);
     
        //Draw Candidate set without support count
        drawcount=1;
        page.setFont(new Font("Arial", Font.PLAIN, 10));
        page.drawString("Candidate Item Set  (C)",230,15);
        page.setColor(new Color(253,245,230));
        page.fill3DRect(250,30,40,input.size()*20+30,true);
        page.setColor(new Color(0,0,0));
        page.drawRect(250,30,40,20);
        page.drawRect(250,50,40,input.size()*20+10);
        page.drawString("ItemSet",250+2,50-2);
        for(Iterator i=input.iterator();i.hasNext();){
          drawcount++;
          i.next();
          page.drawString(" "+"{ x }",250+2,drawcount*20+30);
        }
        page.drawString("Scan D for count of ",320,(input.size()*20+30)/2+40-10);
        page.drawString("each Candidate ",330,(input.size()*20+30)/2+40+15);
        page.setFont(new Font("Arial", Font.PLAIN, 15));
        page.drawString("________________________",300,(input.size()*20+30)/2+40);
        page.setFont(new Font("Arial", Font.PLAIN, 20));
        page.drawString(">",480,(input.size()*20+30)/2+50);
     
        //Draw Candidate set with support count
        drawcount=1;
        page.setFont(new Font("Arial", Font.PLAIN, 10));
        page.drawString("Candidate Item Set with Support Count  (C)",450,15);
        page.setColor(new Color(245,222,179));
        page.fill3DRect(500,30,100,input.size()*20+30,true);
        page.setColor(new Color(0,0,0));
        page.drawRect(500,30,40,20);
        page.drawRect(500+40,30,60,20);
        page.drawRect(500,50,40,input.size()*20+10);
        page.drawString("ItemSet",500+2,50-2);
        page.drawString("Sup.count",500+40+2,50-2);
        page.drawRect(500+40,50,60,input.size()*20+10);
        for(Iterator i=input.iterator();i.hasNext();){
          drawcount++;
          i.next();
          if(drawcount==3 || drawcount ==5){
             page.setColor(new Color(205,92,92));
          }else{
             page.setColor(new Color(0,0,0));
          }
          page.drawString(" "+"{ x }",500+2,drawcount*20+30);
          page.drawString(" y ",500+60,drawcount*20+30);
        }
        page.drawString("Compare candidate support ",610,(input.size()*20+30)/2+40-20);
        page.drawString("count with ",650,(input.size()*20+30)/2+40-5);
        page.drawString("minimum support count ",615,(input.size()*20+30)/2+40+15);
        page.setColor(new Color(205,92,92));
        page.drawString("( MARKED IN RED ) ",630,(input.size()*20+30)/2+40+25);
        page.setColor(new Color(0,0,0));
        page.setFont(new Font("Arial", Font.PLAIN, 15));
        page.drawString("_________________",610,(input.size()*20+30)/2+40);
        page.setFont(new Font("Arial", Font.PLAIN, 20));
        page.drawString(">",735,(input.size()*20+30)/2+50);
     
        //Draw Large Item set with support count
        //removing from input just to reduce the size of large item set
        input.remove(0);
        drawcount=1;
        page.setFont(new Font("Arial", Font.PLAIN, 10));
        page.drawString("Large Item Set  (L) ",760,15);
        page.setColor(new Color(210,180,140));
        page.fill3DRect(750,30,100,input.size()*20+30,true);
        page.setColor(new Color(0,0,0));
        page.drawRect(750,30,40,20);
        page.drawRect(750+40,30,60,20);
        page.drawRect(750,50,40,input.size()*20+10);
        page.drawString("ItemSet",750+2,50-2);
        page.drawString("Sup.count",750+40+2,50-2);
        page.drawRect(750+40,50,60,input.size()*20+10);
        for(Iterator i=input.iterator();i.hasNext();){
          drawcount++;
          i.next();
          page.drawString(" "+"{ x }",750+2,drawcount*20+30);
          page.drawString(" y ",750+60,drawcount*20+30);
        }
     
        //Arrow Lines
        page.setFont(new Font("Arial", Font.PLAIN, 15));
        page.drawString("______",860,(input.size()*20+30)/2+40);
        page.setFont(new Font("Arial", Font.PLAIN, 20));
        page.drawString(">",890,(input.size()*20+30)/2+50);
        page.setFont(new Font("Arial", Font.PLAIN, 15));
        for(int i=0;i<50;i++)
          page.drawString("|",908,(input.size()*20+30)/2+52+i*2);
          page.setFont(new Font("Arial", Font.PLAIN, 10));
          page.drawString("Generate new Candidate set until Large Item set = null",640,(input.size()*20+30)/2+62+50*2-15);
          page.setFont(new Font("Arial", Font.PLAIN, 15));
          page.drawString("_________________________________________________________________________________________",200,(input.size()*20+30)/2+52+50*2-1);
          page.setFont(new Font("Arial", Font.PLAIN, 20));
          page.drawString("<",300,(input.size()*20+30)/2+62+50*2-1);
          page.setFont(new Font("Arial", Font.PLAIN, 15));
          for(int i=0;i<50;i++)
            page.drawString("|",200,(input.size()*20+30)/2+52+i*2);
          page.setFont(new Font("Arial", Font.PLAIN, 25));
          page.drawString("^",195,(input.size()*20+30)/2+92);
          page.setFont(new Font("Arial", Font.PLAIN, 15));
          page.drawString("______",200,(input.size()*20+30)/2+40);
          page.setFont(new Font("Arial", Font.PLAIN, 20));
          page.drawString(">",210,(input.size()*20+30)/2+50);
     
          /**
           * ACTUAL TABLE GENERATED  ....
           */
          for(int i=0;i<CList.size();i++){
     
            //Candidate set without support count
            drawcount=1;
            SortedMap C1 = (SortedMap)CList.get(i);
            page.setColor(new Color(253,245,230));
            page.fill3DRect(drawcount2*360,drawcount*30-20+300,40,C1.size()*30+30,true);
            page.setColor(new Color(0,0,0));
            page.drawRect(drawcount2*360,drawcount*30-20+300,40,20);
            page.drawRect(drawcount2*360,drawcount*30+300,40,C1.size()*30+10);
            page.setColor(new Color(0,0,0));
            page.setFont(new Font("Arial", Font.PLAIN, 15));
            page.drawString("C"+(i+1),drawcount2*360+2,drawcount*30-2+300-25);
            page.setFont(new Font("Arial", Font.PLAIN, 10));
            page.drawString("ItemSet",drawcount2*360+2,drawcount*30-2+300);
            for(Iterator j=C1.keySet().iterator();j.hasNext();){
             drawcount++;
             String key= (String)j.next();
             int count = itemsetsize(key);
             page.drawString(" {"+key+"}",drawcount2*360,drawcount*30+300);
            }
            //Arrow Lines
            page.drawString("____",(drawcount2)*360+40,C1.size()*30/2+300+20);
            page.drawString("____",(drawcount2)*360+40+120,C1.size()*30/2+300+20);
            page.setFont(new Font("Arial", Font.PLAIN, 15));
            page.drawString(">",(drawcount2)*360+40+132,C1.size()*30/2+300+20+7);
            page.drawString(">",(drawcount2)*360+40+12,C1.size()*30/2+300+20+7);
     
            //Candidate Item set with support Count
            drawcount=1;
            page.setColor(new Color(245,222,179));
            page.fill3DRect(drawcount2*360+60,drawcount*30-20+300,100,C1.size()*30+30,true);
            page.setColor(new Color(0,0,0));
            page.drawRect(drawcount2*360+60,drawcount*30-20+300,40,20);
            page.drawRect(drawcount2*360+60+40,drawcount*30-20+300,60,20);
            page.drawRect(drawcount2*360+60,drawcount*30+300,40,C1.size()*30+10);
            page.setFont(new Font("Arial", Font.PLAIN, 15));
            page.drawString("C"+(i+1),drawcount2*360+60+2,drawcount*30-2+300-25);
            page.setFont(new Font("Arial", Font.PLAIN, 9));
            page.drawString("with Support Count",drawcount2*360+79+2,drawcount*30-2+300-25);
            page.setFont(new Font("Arial", Font.PLAIN, 10));
            page.drawString("ItemSet",drawcount2*360+60+2,drawcount*30-2+300);
            page.drawString("Sup.count",drawcount2*360+60+42,drawcount*30-2+300);
            page.drawRect(drawcount2*360+60+40,drawcount*30+300,60,C1.size()*30+10);
            for(Iterator j=C1.keySet().iterator();j.hasNext();){
             drawcount++;
             String key= (String)j.next();
             int count = itemsetsize(key);
             if(((Integer)C1.get(key)).intValue()>=minSupportCount){
                page.setColor(new Color(0,0,0));
             }else{
                page.setColor(new Color(205,92,92));
             }
             page.drawString(" {"+key+"}",drawcount2*360+60,drawcount*30+300);
             page.drawString(C1.get(key).toString(),drawcount2*360+60+50,drawcount*30+300);
            }
     
            //Large Item Set with Support Count
            drawcount=1;
            SortedMap L1 = (SortedMap)LList.get(i);
            page.setColor(new Color(210,180,140));
            page.fill3DRect(drawcount2*360+180,drawcount*30-20+300,100,L1.size()*30+30,true);
            page.setColor(new Color(0,0,0));
            page.drawRect(drawcount2*360+180,drawcount*30-20+300,40,20);
            page.drawRect(drawcount2*360+180+40,drawcount*30-20+300,60,20);
            page.drawRect(drawcount2*360+180,drawcount*30+300,40,L1.size()*30+10);
            page.setFont(new Font("Arial", Font.PLAIN, 15));
            page.drawString("L"+(i+1),drawcount2*360+180+2,drawcount*30-2+300-25);
            page.setFont(new Font("Arial", Font.PLAIN, 9));
            page.drawString("with Support Count",drawcount2*360+19+180+2,drawcount*30-2+300-25);
            page.setFont(new Font("Arial", Font.PLAIN, 10));
            page.drawString("ItemSet",drawcount2*360+180+2,drawcount*30-2+300);
            page.drawString("Sup.count",drawcount2*360+180+42,drawcount*30-2+300);
            page.drawRect(drawcount2*360+180+40,drawcount*30+300,60,L1.size()*30+10);
            for(Iterator j=L1.keySet().iterator();j.hasNext();){
             drawcount++;
             String key= (String)j.next();
             int count = itemsetsize(key);
             page.drawString(" {"+key+"}",drawcount2*360+180,drawcount*30+300);
             page.drawString(L1.get(key).toString(),drawcount2*360+180+50,drawcount*30+300);
            }
            drawcount2++;
        }
      }
     
      /**
       * Generates a Large Item Set Map from Candidate Itemset Map by comparing with minimum
       * Support Count.
       */
      static public SortedMap generateLMap(SortedMap CMap,Integer minSupportCount){
        SortedMap LMap=new TreeMap();
        for(Iterator i=CMap.keySet().iterator();i.hasNext();){
          String key= (String)i.next();
          if( ((Integer)CMap.get(key)).intValue() >= minSupportCount.intValue() ){
            LMap.put(key,CMap.get(key));
          }
        }
        return LMap;
      }
     
      /**
       * Returns a boolean value to check if subsets of candidate Item is present in
       * previous large item set. For Example if Candidate Item is {1,2,3}
       * it checks if {1,2}, {2,3} and {1,3} is present in Previous large Item Set.
       */
      static public boolean isSubSetsPresent(String itemset,SortedMap CMap){
        boolean present=false;
        String subsets= gensubset(itemset);
        StringTokenizer st = new StringTokenizer(subsets," ");
        while(st.hasMoreTokens()){
          String key = st.nextToken();
          present=false;
          for(Iterator i=CMap.keySet().iterator();i.hasNext();){
            String ckey= (String)i.next();
            if(key.equalsIgnoreCase(ckey)){
              present=true;
            }
          }
          if(!present)
           return present;
        }
        return present;
      }
     
        /**
         * Returns the number of times an itemset is present in input.
         */
        static public Integer getCount(List input,String itemset){
          boolean isThere=true;
           int count=0;
              for(Iterator j=input.iterator();j.hasNext();){
                 isThere=true;
                 String temp=(String)j.next();
                 StringTokenizer st=new StringTokenizer(itemset,",");
                 while(st.hasMoreTokens()){
                   String nextSubset=st.nextToken();
                   if( (temp). indexOf(nextSubset)==-1){
                     isThere=false;
                   }
                 }
                 if(isThere){
                    count++;
                 }
              }
          return new Integer(count);
        }
     
        /**
         * Generates a String of subsets from Given Itemset.
         * e.x for an input of {1,2,3} it gives an output of
         * {1,2 2,3 3,4}
         */
        static public  String gensubset(String itemset) {
          int len=itemsetsize(itemset);
          int i,j;
          String str1;
          String str2=new String();
          String str3=new String();
          if (len==1)
            return null;
          for (i=1;i<=len;i++) {
            StringTokenizer st=new StringTokenizer(itemset,",");
            str1=new String();
            for (j=1;j<i;j++) {
              str1=str1.concat(st.nextToken());
              str1=str1.concat(",");
            }
            str2=st.nextToken();
            for (j=i+1;j<=len;j++) {
              str1=str1.concat(st.nextToken());
              str1=str1.concat(",");
            }
            if (i!=1)
              str3=str3.concat(" ");
            str3=str3.concat(str1.substring(0,str1.length()-1));
          }
          return str3;
      }
     
      /**
       * Utility function. Gives a ItemsetSize.
       */
      static public int itemsetsize(String itemset) {
        StringTokenizer st=new StringTokenizer(itemset,",");
        return st.countTokens();
      }
    }
     
    public class Apriori extends Applet {
      private TextField text;
      private Panel panel;
      private Panel panel1;
      private Label label;
      private Choice choice;
      private showResult show ;
      private Panel showPanel;
     
      private Button b1;
      private static String selection = "2";
      //Graphics page=new Graphics();
      public void init()
      {
        this.resize(1000,2000);
        show = new showResult();
        show.resize(2000,1500);
        panel=new Panel();
        panel1 = new Panel();
        showPanel= new Panel();
     
        label=new Label();
        label.setFont(new Font("Arial", Font.PLAIN, 15));
        label.setText("Select Minimum Support Count and Hit Browser Refresh Button .");
        text=new TextField();
        choice= new Choice();
        choice.add("2");
        choice.add("0");
        choice.add("1");
        choice.add("3");
        choice.add("4");
        choice.select(selection);
        System.out.println("Min Sup Count " +show.getMinSupportCount());
        setLayout(new BorderLayout());
        panel1.setLayout(new BorderLayout());
        panel.add(label);
        panel.add(choice);
        panel.setBackground(Color.lightGray);
        showPanel.add("West",show);
        panel1.add("West",panel);
        this.add("North",panel1);
        this.add("West",showPanel);
      }
     
           public boolean action(Event e,Object o)
    	 {
    	  if (e.target instanceof Choice)
    		{
                      showResult.setMinSupportCount(new Integer(choice.getSelectedItem()));
                      selection=choice.getSelectedItem();
    		}
    	  return true;
    	}
    }

    error]
    C:\JavaPrograms>java Apriori
    Exception in thread "main" java.lang.NoSuchMethodError: main

    C:\JavaPrograms>
    Last edited by curmudgeon; January 30th, 2013 at 03:08 AM. Reason: code tags fixed


  2. #2
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    Default Re: core java

    Oh my lord that is one heck of a lot of posted code! The problem appears to me though that you look like you're trying to run an applet as if it were a regular Java program. Don't do that but rather launch an applet through HTML as the tutorials will direct you to do. For detains I refer you to the tutorials which Google will help you find.

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