See Occurrences Of A Character In A String Stored In Text File

Apr 26, 2014

I have this program to see the occurrences of a character in a string stored in a text file. My text file has the following contents (as shown below):

P-P-N-N-L-V
N-R-U-S-R-Q
K-Q-E-L-E-A
A-J-B-G-E-F
F-E-L-Q-R-R
U-F-J-V-I-M
P-I-Q-K-B-K
U-N-L-F-O-B
M-A-N-M-H-O
P-Q-J-D-N-I
G-U-O-D-F-I
Q-M-M-B-C-Q
N-B-I-L-E-J
S-A-T-Q-H-U
C-L-G-U-J-M
R-P-V-M-A-A
C-R-A-V-L-B
M-U-Q-K-M-Q
E-I-C-H-V-J
J-N-N-K-R-P

As you notice, each character is seperated by a hyphen (serving as its delimiter). I want to only go through 10 lines in the text, instead of all 20 of them. So, I wrote the program in such a way that I intend to reach into the indices of each character in the text file. Since there are six characters in each line so that means there are 6 indices - and there are 10 lines I only want to go through. So, 6 indices times 10 lines equals 60 indices. Hence, there are only 60 indices I need to go through. In that manner, it's like I have gone through only 10 lines through that way.

It compiled perfectly fine but upon running it, I ran through an error in the black DOS screen that says

"java.lang.ArrayIndexOutofBoundsException: 6 ".

How do I work around that?

The code I wrote is shown below...

import java.io.*;
import java.util.*;
public class hotandcoldclusterdeterminer_test {
public static void main (String args [])throws IOException {

[Code]....

View Replies


ADVERTISEMENT

Program To See Occurrences Of A Character In String Stored In Text File

Apr 26, 2014

I have this program to see the occurrences of a character in a string stored in a text file. My text file has the following contents (as shown below):

Quote
P-P-N-N-L-V
N-R-U-S-R-Q
K-Q-E-L-E-A
A-J-B-G-E-F
F-E-L-Q-R-R
U-F-J-V-I-M
P-I-Q-K-B-K
U-N-L-F-O-B
M-A-N-M-H-O
P-Q-J-D-N-I
G-U-O-D-F-I
Q-M-M-B-C-Q
N-B-I-L-E-J
S-A-T-Q-H-U
C-L-G-U-J-M
R-P-V-M-A-A
C-R-A-V-L-B
M-U-Q-K-M-Q
E-I-C-H-V-J
J-N-N-K-R-P

View Replies View Related

Removes All Occurrences Of Specified String From Text File?

Apr 30, 2014

Write a program that removes all the occurrences of a specified string from a text file. For example, invoking java Exercise14_11 John filename removes the string John from the specified file. Your program should get the arguments from the command line.

I have a problem.

Text document is Match.txt
Match.txt contains a string: "Open the door John"

I tried to create a new file named doc.txt where to put the text from the Match.txt without John word

//to read from document
Scanner output = new Scanner("Match.text");
//to write to document
PrintWriter write = new PrintWriter("doc.txt");
//copy from original document
String copy = "";
while(output.hasNextLine())

[code]...

Error :NoSuchElementException

View Replies View Related

Number Of Occurrences Of Specified Character In A String

Oct 16, 2014

the number of occurrences of a specified character in a string...i tried to do the program occurrences in a given string and i tried the code as below.

code:

import java.util.*;
public class Occurrence
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);

[code]....

View Replies View Related

Unable To Write Text File With Information Stored

Jul 27, 2014

I am trying to write to a text file with information stored like this.

brick 500
stone 500

And so on. Here is the code I am using to write to the file.

switch(record){
case "brick":
x.format("%s%n", "brick " + value);
closeFile();
break;
case "log":
x.format("
%s%n", "log " + value);
closeFile();
break;

When I write like this, putting deletes the first line. What I can look into or other functions that would be useful?

View Replies View Related

Text Fields - Input String Character S

Aug 24, 2014

What should be the code if i want to input a different string in case of the typed string. The case is : I have a predefined string S = "Peter,please answer my question" and now when i input another string inside the text field character by character i want characters from the string S to enter instead of the input string. In short, the input string should be disguised as string S.

View Replies View Related

Program That Read TXT File And Count Character Occurrence In String

Jan 12, 2014

I wrote a program to read a .txt file and return how many times a, e, s, and t occur in the .txt file. I am getting an error that I do not know how to fix. It says Error: FileNotFoundException cannot be resolved to a type...

import java.util.Scanner;
import java.io.File;
import java.io.IOException;
import java.io.BufferedReader;
public class Count
{
public static void main (String[] args) throws FileNotFoundException {
String phrase; // a string of characters

[Code] ....

View Replies View Related

Returning All Occurrences Of C In String

May 13, 2014

Write a method that accepts an array of Strings and a character c. The method must return the count of all cs in the strings of the array.

Here's what I have written:

[
public int countC(String[] strings, char c) {
int count = 0;
for(int i = 0; i < strings.length; i++) {
for(int j = 0; j < strings[i].length(); j++) {
if(strings[i].charAt(j) == c) {
count++;
}
}
}
return count;
}]

Does this look correct?

View Replies View Related

Count Number Of Occurrences Of A String In Array List?

Apr 6, 2015

I am trying to count the number of occurrences of a string in an array list. I used the following code:

int count = Collections.frequency(strings, search);

strings is the name of the array list and search is the string that I am trying to count the number of occurrences of. My program compiles correctly, but when I enter the string to search for, I get the following error: "Exception in thread "main" java.lang.NullPointerException at java.util.Collections.frquency(Collections.java:37 18)

Why am I getting this error message and how do I fix it?

View Replies View Related

Trying To Read In A String From Text File

Nov 17, 2014

So I am saving a file. it is an array of two strings each containing three words. i figured out how to save to a text file and read it back in and put it back into an array. I am using scanner.hasnext and scanner.next and i think that separates the strings into variables using the spaces in the strings. Well for my project i need to do it with a symbol instead of a space

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.Writer;
import java.util.Scanner;

[Code] .....

I put some comments in the read method so you can get exactly what im trying to accomplish....

View Replies View Related

Reading Text File Content To String

Aug 6, 2014

Show me a code where I can get text file all content to String?

View Replies View Related

Appending String To A Text File In Java?

Apr 4, 2015

I am at a loss when it comes to appending Strings to a text file in Java. I was tasked (yes, homework) to complete a program that does the following simple things:

Print out the contents of a text file to the user (got that!)

Ask the user if the want to add any customers to this text file (got it!)

Add those customer's name's, addresses, postal codes and cities. (got that too)

Verify the postal code is in the proper format (yep!)

Add the new information to the text file, and display it to the user (Nope...)

The program is, essentially, supposed to keep track of the user's customers, and store this information to a text file. However, when I run the following code, I get a number of errors:

static String firstOutput, name, address, city, postalCode, file = "";
static int customer = 0;
static String fileLine = "";
public static void main(String[] args) throws IOException {
file = "C:UsersOwnerDocumentsDiscountFly.txt";

[Code] .....

The errors I get are:

Java.io.exception. Main. Stream closed
ensureOpen (115)
ava.io.BufferedReader.readLine(BufferedReader.java:310)

I understand that the numbers correspond to lines of code (line 115, or 310, for example) but I am unsure of how to fix these errors.

View Replies View Related

Delete String From Text File Fails On Deployment

Apr 14, 2014

This is the code that i have used to delete particular String from text file. It works absolutely fine on eclipse and netbeans.. But on deployment(in tomcat) it fails to delete message/rename or delete original file even though all permissions for modifying the files in the folder has been given to all users.

This is my code:

package com.pro.model;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

[Code] ....

View Replies View Related

Removing Specific Line From Text File That Contains Certain String?

Mar 8, 2014

So basically, if a line in a text file contains a certain string, that specific line will be deleted. It should probably be similair to this method?

Java Code:

/**
* Replace text.
* @param replace
* The text to replace.
* @param replaceWith
* The text to replace with.
*/
public static void replaceSelected(String replace, String replaceWith) {
try {
BufferedReader file = new BufferedReader(new FileReader("data/replacer.txt"));

[code]....

View Replies View Related

Reading A Text File And Inserting Line Into String?

Dec 6, 2014

I am having issues insert each line of the simple textfile into a specific varible I want it to go to. For example my text file is ordered like this

Dallas
78 F
North, 15 mph
dallasimage
Denver
29 F
South, 10 mph
denverimage

and I want Dallas in city variable, 78f in temperature variable, and so on until text ends, at the moment is all goes into city variable, it all prints from there! I tried inserting it into an array but it would read all the lines previous to it in addition to reusing readline and all failed.

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class Textreader {
public static void main(String[] args) {

[code]....

View Replies View Related

Writing To Text File - Print String On One Line

Oct 19, 2014

I am writing to a text file via user input and it is saving all the user input to the file but it is just printing one word per line. I would like it to print the string on one line and print the next string on the next line upon them hitting enter.

public void textFile() {
Scanner reader = new Scanner(System.in);
System.out.println("Enter file name: ");
String fileName = reader.next();
File f = new File(fileName);
PrintWriter p = null;

[Code] ....

View Replies View Related

Search For A String In Large Text File Of 1 GB Size And Print Line When Match Found

Feb 18, 2014

I have a large text file of 1 GB size. I need to print the line when a matching word is found in a particular line. Below is the code I am using. But if there are many lines that has the matching word, it's taking lot of time. Any solution to print the lines much faster.

Scanner scanner = new Scanner(file);
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
if(line.contains("xyz")) {
System.out.println(line);
}
}

View Replies View Related

Display PDF File Which Is Stored In MySQL Database?

Apr 2, 2015

How to display pdf file which is stored in mysql database by using jsp and servlet ....

View Replies View Related

JSF :: Upload File With Path Stored In Database?

May 20, 2014

I'm using jsf 2 to upload file, first I upload the file in a system directory, then trying to store the path to database with other information, my stuck is that when submitting I upload the file successfully, find it in the right place, find the other information such as description, file name ... in database but don't find the path. this is my managed bean :

package mbeans;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.List;

[code]...

View Replies View Related

Splitting A String By Character

Feb 14, 2014

I'm trying to use the split method to split a string for a calculator, but it keeps throwing this Exception:

Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0
+

public class exp {
private static String ques="88+12";
private static String [] splitCalc;
public static void main(String[] args) {
splitCalc = ques.split("+");
for(String s : splitCalc){
System.out.println(s);
}
}
}

View Replies View Related

Removing A Character From String?

Sep 26, 2014

I am trying to remove a character from string as below

public String reomveChar(String str, int n) {
if(0<=n & n<=(str.length()-1)){
//str.charAt(n)
char o=str.charAt(n);
return str.replace("o","");
//a.replace("o","");
}
return null;
}'

what is the best way to remove it.

If i call like

removeChar("hello", 1) i should see hllo.

When there are more than one way to do a challenge in java which one to choose as best way.

What is the criteria to decide one particular way of writing code is best among say 'n' different number of ways.

View Replies View Related

How To Retrieve A Character From String

Mar 7, 2014

String charAt() method returns a particular Character at the specified index in the String.

How is this function implemented internally?. How a particular character can be retrieved from String?.

View Replies View Related

Swapping String First And Last Character?

Sep 28, 2014

I am trying to swap given string first and last character. If I pass world i should get 'dorlw'

I found link and code [URL]....

String str="hello";
char[] charArray=str.toCharArray();
int indexOfLastChar=charArray.length-1;
for(int i=0;i<charArray.length/2;i++){
char temp=chatArray[i];
charArray[1]=charArray[indexOfLastChar-i];
charArray[indexOfLastChar-i]=temp;
}
String reversedStr=new String(charArray)
System.out.println("reversed string"+str+reversedStr);

I wonder Is there is any easy simple way to do it.

View Replies View Related

Property Files That Used To Configure The Application Can Be Stored In Jar File?

Dec 22, 2013

I already used properties file without problems for localizing information. In that case the property file was stored as a resource in a package; and I used the Class ResourceBundle to manage the operations and the ClassLoader to access to the file.

Actually I need to use property files “To save the configuration of the application”.In this case I need also to update information stored inside the file.property, and I used the same procedure as before to manage it (ClassLoader to get data- also for writing).

I had problems in this case: that the data was never modified inside the properties file. I investigate, and now I think that the problem comes from writing in the property file that is located in the .jar file. For what I know, it is impossible to change resources putted in the .jar files.

I found a solution: to store the properties files out the jar files; and in this way all is good. But it would be more comfortable to store inside.

My question is : if a file property used to “save the configuration of the application “ have to be put out of jar, or is there another way ??

View Replies View Related

Replacing And Checking Character In String?

Jul 24, 2014

so my task is to write a code which would ask user to input the year as integer and first three letters of the month with first being an upper case letter. Than the program would determine the number of days for given year and month.

Currently I have a brain crash on how to check, if the user has provided the month with first character being upper Case. If not, than the program would automatically correct the character. Problem starts at line 17.

import java.util.Scanner;

public class DaysOfMonth4_17 {
public static void main (String[] args) {
//Initiate scanner
Scanner input = new Scanner (System.in);
//Ask for year input and use is as INT
System.out.println("Enter the year");

[code]...

View Replies View Related

Uppercase Character Counter In A String

Jun 11, 2014

I have to create a code that can calculate the number of upper case letters in a string that is entered by the user (below.)

Java Code:

import javax.swing.JOptionPane;
public class mainClass {
public static void main (String [] args) {
String userInput;
userInput = JOptionPane.showInputDialog("Enter a string.");

[Code] ....

My issue is that I would like the program to be able to function properly when spaces are entered into the string. As it is right now, I believe it is only processing the first string entered into the input box.

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved