Frequency of words in Arrays

Question

Dear Java Folks,
I still need your help!
I am still having problem after succeeding in tokenizing the Strings in LinkedList.
What I wanted to do is to find the Frequency of words or characters in an Array.
E.g
1�A,C,F,G,A
2�Baby,H,K,A,C,K
3�Oslo,S,F,T,K
The first line will return 2A, 1C, 1F, 1G. Thereafter, I will find the Frequency of the second line which will be 1Baby, 1H, 2K, 1A, 1C etc.
For now, I am only interested in getting the Frequency
of the first line.
My Code
public String DataCall() {
          DataInputStream dis = null;
          String line = null;
          String []words;
          String []Lines;
          List <String>result = new LinkedList<String>();
          List<String> dataList1 = new LinkedList<String>();
          List<String> dataList2 = new LinkedList<String>();
          List<String> onlyWords = new LinkedList<String>();
          List<Integer> frequency = new LinkedList<Integer>();
          int counter = 0;
          try {
                   File data = new File("C:/text.txt");
                    FileInputStream in = new FileInputStream(data);
                    dis = new DataInputStream (in);
                    BufferedReader br = new BufferedReader(new InputStreamReader(dis));
                    line  = br.readLine();
          if (line != null) {
                         Lines = (line.split(" ")); //Split the first row or line
                         for(String datas : Lines)  // add the data to the Linkedlist
                              dataList1.add(datas);
                         for (int i = 0; i < dataList1.size(); i++) {
                           words = (dataList1.get(i).split("�"));   // split to get to �
                           for (int b = 0; b < words.length; b++) {
                                String []wordCount = words.split(","); // split the remaing words or characaters
               for (String saveD : wordCount)
                         onlyWords.add(saveD); // add the data to Linkedlist "onlyWords
          // Start the frequency calculation
          for (int point = 0; point < onlyWords.size(); point++)
               if (!dataList2.contains(onlyWords.get(point))) //Initially dataList2 is empty here
                    dataList2.add(onlyWords.get(point)); // add data to Linkedlist "datalist2"
                    frequency.add(1); // add 1 to (int) Linkedlist "frequency"
               else
                    int tmp = 0;
                    tmp = onlyWords.indexOf(point); //get the index where the "word" occured first
                    counter = frequency.get(tmp); //ge the value of the same index in the Linkedlist "frequency"
                    counter++;
                    frequency.set(tmp, counter);
          for (int k = 1; k < dataList2.size(); k++) {
     System.out.println(onlyWords.get(k) + " " + frequency.get(k));
          else System.out.println("There is no data to read\n");
          catch (IOException e) {
                    //catch io errors
                    System.out.println("IOException error: " + e.getMessage());
          finally {
                    // if the file successfully opened
                    if (dis != null) {
                         try {
                         dis.close();
                         catch (IOException ioe){
                         System.out.println("IOException error when trying to close the file: " + ioe.getMessage());
               }//end if
          }// end finally
               return null; // just for a test. I will return result
     } // end DataCall
The code if run shows the the following the errors;
at java.util.LinkedList.entry(Unknown Source)
at java.util.LinkedList.get(Unknown Source)
at fileReader.DataFrequency.DataCall(DataFrequency.java:80)

Answer 1

here i have modified the code, but still getting the error in the count
import java.io.File;
import java.util.Formatter;
import java.util.Scanner;
public class StudentPoll_dasariHaritha {
private Scanner x;
int[] frequency = new int[5];
int count =0;
public void openFile(){
try{
x = new Scanner(new File("numbers.txt"));
catch(Exception e){
System.out.printf("No File found");
public void readFile(){
while(x.hasNext()){
int a= x.nextInt();
if(a==1){
frequency[0]=0;
++frequency[0];
break;
else if (a== 2){
frequency[1]=0;
++frequency[1];
break;
else if( a==3){
frequency[2]=0;
++frequency[2];
break;
else if (a==4){
frequency[3]=0;
++frequency[3];
break;
else if (a== 5){
frequency[4]=0;
++frequency [4];
break;
System.out.printf("%s%10s\n","Rating","Frequency");
System.out.printf("%s%10s\n","1",++frequency[0]);
System.out.printf("%s%10s\n","2",++frequency[1]);
System.out.printf("%s%10s\n","3",++frequency[2]);
System.out.printf("%s%10s\n","4",++frequency[3]);
System.out.printf("%s%10s\n","5",++frequency[4]);
public void closeFile(){
x.close();
in the main method iam calling these methods
StudentPoll_dasariHaritha read = new StudentPoll_dasariHaritha();
read.openFile();
read.readFile();
read.closeFile();
i think in the while loop iam making a mistake. can someone help me in rectifying it.