How to delete string from an array

Question

I just want to know that what changes i can do to delete the string if contains any extra characters like digits and punctuation marks in the middle or begining of the string but not at the end of the string, i've already tried to delete only the punctuation marks at the end of the string and keep that word. Please dont forget that i m a beginer
import java.io.*;
import java.util.*;
class Project
public static void main()throws IOException
// set up input stream
File finput = new File("C:\\f1.txt");
FileReader fr = new FileReader(finput);
BufferedReader fin = new BufferedReader (fr);
// set up output stream
File foutput = new File("C:\\f3.txt");
FileWriter fw = new FileWriter (foutput);
PrintWriter fout = new PrintWriter (fw);
String nextLine; // a line read from the file
StringTokenizer t; // the words within the line
ArrayList words = new ArrayList(); // an array of words
//String n = {0,1,2,3,4,5,6,7,8,9};
System.out.println("Reading file.\n");
// start
while (true)
nextLine =fin.readLine(); // read from input file
if (nextLine==null) break; // if no more lines, get out
t = new StringTokenizer(nextLine); // identify words
while (t.hasMoreTokens())
String str = (String)t.nextToken();
str = str.toLowerCase(); // Converting all uppercase to lowercase.
// Replacing all punctuation marks.
str=str.replace(',',' ');
str=str.replace('?',' ');
str=str.replace('!',' ');
str=str.replace('.',' ');
str=str.replace(':',' ');
str=str.replace(';',' ');
str=str.replace('"',' ');
str=str.replace('"',' ');
str=str.trim(); // Removing empty spaces after words
words.add(str); // add them to array
String z; // Declaring string z for sorting.
for (int i=0; i<words.size(); i++)
for (int j=i+1; j<words.size(); j++)
// Sorting the Array list.
if (((String)words.get(j)).compareTo((String)words.get(i))<0)
z=(String)words.get(i);
words.remove(i);
words.add(i,(String)words.get(j-1));
words.remove(j);
words.add(j,z);
// To replacing word which have got "'".
if ((String)words.get(i)).indexOf("'")!=-1)
a="";
int count[]=new int[words.size()]; //Creating int array for counting the repetition.
for (int i=0;i<=words.size()-1;i++)
for (int j=i+1;j<=words.size()-1;j++)
//Counting the repetition of the string.
//if (((String)words.get(j)).compareTo((String)words.get(i))==0)
if (((String)words.get(j)).equals((String)words.get(i))==true)
count[i]++;
words.remove(j);
j=j-1;
System.out.println("Dictionary\t|\tRepetition");
System.out.println("==========\t \t==========\n");
for (int i=0; i<words.size(); i++)
count[i]++; // initialinzing the value with 1
// Printing result on the output file.
fout.println((String)words.get(i));
// Printing result on the screen with histogram.
System.out.println((String)words.get(i)+ "\t\t|\t" +count[i]);
fout.close();
System.out.println();
System.out.println("Finished");
} //end of main.

Answer 1

The code that you pasted does not seem like written by a beginner. So, did you write the code?
If so, you should have no problem solving this simple thing.
If not, then copy and pasting a block of program that you don't understand will keep you as a beginner all the time, so can't help you if you are willing to stay at beginner.
--lichu