Mika Joeng
Count characters from text file in Java
1 Answer(s)      4 years and a month ago
Posted in : Java Beginners

At the "Count chracters fro mtext file in Java". I tried to run the code, but the error at the line have the directory of the text file ("C:\text.txt"). I use Eclipse to run this code. I copied the text.txt into the same folder of src of the file, and put my directory is ("C:\users\john\study\text.txt"), but its still has error said "the invalid escape sequence " HOw can I fix it? please tell me . Thanks

October 5, 2012 at 10:16 AM

Here is a java code that count the occurrence of each character from text file.

import java.io.*;
import java.util.*;

class CountCharactersFromFile {
public static void main(String[] args) throws Exception{
FileInputStream fstream = new FileInputStream("C:\\data.txt");
DataInputStream in = new DataInputStream(fstream);
String strLine="";
String str="";
while ((strLine = br.readLine()) != null) {

str+=strLine;
}
String st=str.replaceAll(" ", "");
char[]third =st.toCharArray();
System.out.println("Character Total");
for(int counter =0;counter<third.length;counter++){
char ch= third[counter];
int count=0;
for ( int i=0; i<third.length; i++){
if (ch==third[i])
count++;
}
boolean flag=false;
for(int j=counter-1;j>=0;j--){
if(ch==third[j])
flag=true;
}
if(!flag){
System.out.println(ch+" "+count);
}
}
}
}


Count characters from text file in Java
Count characters from text file in Java  At the "Count chracters fro mtext file in Java". I tried to run the code, but the error at the line have... is a java code that count the occurrence of each character from text file. import
Count characters from text file in Java
Count characters from text file Using Java Here we are going to count the occurrence of each character from the text file. For this, we have used the BufferedReader  class to read the specified file. Then we have removed
Java count characters from file
Java count characters from file In this section, you will learn how to count characters from the file. Description of code: Firstly, we have used FileReader... read the file and count the occurrence of each character of the content
java program to insert data into a file and count the number of words from the file???????
java program to insert data into a file and count the number of words from the file???????  java program to insert data into a file and count the number of words from the file
Count number of characters in a column.
Count number of characters in a column.  I just need you suggestions. Am from Biology Back ground. I just need to find out number of characters in a column i.e, if i have a file with text in this manner ACGT GCTA GCTA i need
count characters
count characters  i have to print the total number of char 'A' in all... sabah sarawak terengganu the output must be count the total number of char... main(String[] args) { int count=0; Scanner input=new Scanner
Character from text file - Java Beginners
Character from text file  Write a program that reads characters from a text file. Your program will count how many time each character appear in the text. Assume that the letters are case-sensitive. Example output
Count Characters from the input string Java
Count Characters from the input string of Java In this section, you will learn how to count the occurrence of each character in the string. For this, we have... the string from the console. Firstly we have removed all the spaces between the string
Reading text from image file - Java Beginners
Count repetitions of every word from an input file
Count repetitions of every word from an input file  Hello..i got to know how can i count the repetitions of every word present in a specific input file?For suppose if i have a url log file which have time,url's,ip address etc
Java file line count
Java file line count In the section, you will learn how to count the number of lines from the given file. Description of code: Java has provide various... class here, to read  all the lines from the file. You can see in the given
convert data from pdf to text file - Java Beginners
convert data from pdf to text file   how to read the data from pdf file and put it into text file(.txt
Read specific column data from text file in java
Read specific column data from text file in java  My question is if my text file contain 15 columns and i want read specific column data from that text file then what code i should do
Java Read Lines from Text File and Output in Reverse order to a Different Text File
Java Read Lines from Text File and Output in Reverse order to a Different Text File  I need to read a file that was selected by the user using... to another text file. When that is done the output values of that file need
Search word from text file using Java
How to Search word from text file using Java In this section, we are going to search a word from the text file. For this, we have created a swing button... from the text file. Here is the code: import java.io.*; import
Java count words from file
Java count words from file In this section, you will learn how to determine the number of words present in the file. Explanation: Java has provides several... from the file. You can see in the given example, we have initialized a counter
Read Lines from text file  Here's a brief desc of what my Java code does .. I'm using BufferedReader to read lines from a text files and split each... read from the text file and displays the output as desired. Unable to read the rest
How to make a list from file text in J2ME - Java Beginners
How to make a list from file text in J2ME  I was trying to make a method that read file from text and make a list of it, I have tried ReadHelpText...) { } return null; } kamus.txt file contains: iconSebuah lambang kecil berupa gambar
Java search word from text file
Java search word from text file In this tutorial, you will learn how to search a word from text file and display data related to that word. Here, we have created a text file student.txt which consists of id, name and marks of few
Reading a text file in java
stop word removal from text file
stop word removal from text file  i need java source code for stop word removal from a text file
Create text file at client's directory from server.
Create text file at client's directory from server.  Need java code to create text file at client's directory from server..... Please Help
Java Word Count - Word Count Example in Java
Java Word Count - Word Count Example in Java  ... to count the number of lines, number of words and number of characters... some strings and program will count the number of characters and number of words
inserting text into text file using java application
inserting text into text file using java application  Hi, I want to insert a text or string into a text file using java application
Java characters
Java characters  How many bits are used to represent Unicode, ASCII, UTF-16, and UTF-8 characters
Read Text file from Javascript - JSP-Servlet
Read Text file from Javascript  plz send the code How to Retrieve the data from .txt file thru Javascript? And how to find the perticular words in that file
Importing data into sql plus from a text file...
Importing data into sql plus from a text file...  How to import a text file into oracle 10g enterprise edition directly to create tables and data
Importing data into sql plus from a text file...
Importing data into sql plus from a text file...  How to import a text file into oracle 10g enterprise edition directly to create tables and data
binary search tree from text file
binary search tree from text file  How so I go about constructing a binary search tree from a text file, which has letters and numbers, which must be sorted and printed in ascending order. E.g. Text file contents 3 apples pears
Removing characters from a string
Removing characters from a string  Removing characters from a string   Example: public class CharReplace{ public static void main(String []args){ String str="Hello 123.you are At 3456"; String
how to match the key word from a text file
how to match the key word from a text file  p>Hi all, I have the code to match the key word and from the text. I have input like this reader.txt... want to get the value from the called file and get the result. String regex1