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
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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]....
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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
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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]....
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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] ....
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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?
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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.
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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?
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Dec 27, 2014
public static void main(String[] args) throws FileNotFoundException, IOException{
// TODO code application logic here
FileReader fr = new FileReader("gautam.txt");
BufferedReader br = new BufferedReader(fr);
int line = 0;
int word = 0;
int character = 0;
String s;
while((s=br.readLine())!=null)
[code]...
how to count the character from file
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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?
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Apr 9, 2015
java code for adding one text file into the zipped file without extracting It is possible in java code ?
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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....
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Jan 29, 2015
i have made one desktop application with swing and i have uses one textfile (File) in it. i want to handover to another friend to use it . How to create jar file of that program with that text file so that my friend use it without any issue . I have made it in NetBeans
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Aug 6, 2014
Show me a code where I can get text file all content to String?
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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.
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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] ....
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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]....
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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]....
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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] ....
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Apr 29, 2014
I'm working on a project for my Java class and I've got the code compiled and running, I just don't think that the program is reading the text file the way I want it to.
The text file looks like this:
1168,4.25,10
1305,1.80,42
1345,12.56,16
1388,7.42,30
1480,6.54,80
1495,8.36,48
1560,15.27,65
...
The first number being product number, second being price, and 3rd being quantity. I want to be able to enter the product number and have the Textfields for price and quantity be filled accordingly.
But when I enter a product number (e.g., '1168') no match for the item is being found, regardless of what I enter. Really stumped on this. Here's my code so far --
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.Scanner;
public class Project3
{
private static Frame myframe;
private static TextField productCode;
private static TextField invNumberField;
[Code]...
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Sep 21, 2014
I'm trying to copy my program output to a text file and still have it be displayed in the console.
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Mar 19, 2015
I was wondering if it's possible to do this: I want to build a java program that reads a java array from a text file.
Then I want to read it, and output it in a different format.
The reading and out is easy - as text.
But how can I incorporate the read text in to a java valid array in my program, which I can use?
Is this even possible?
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Apr 14, 2014
I have to write a gui program where I can enter a file name and then it gets displayed in a text area when I click Open. Conceptually, I do not get this. I was thinking of appending the text file into a string or something, but I guess I'm confused on how it all works and how I can open the text file. Not asking for the code, but just a compass or something.
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Feb 12, 2015
This has three different classes in a package and the program itself is supposed to read and perform operations obtained from a txt file. However, I'm not even sure how to get it to perform the operations from the text file. I know that it can read the file as I was able to get the program to print the text found in the file when I ran the program with a test print to make sure that all content was being read. However, I am clueless when it comes to how to get the program to look at the text as commands.
Here is the piece of code that I am not sure where to go from as far as telling the program to read the text and perform the tasks listed.
public static void doTVoperations(){
File operations = new File("operations.txt");
if(operations.exists())
try{
Scanner n = new Scanner(operations);
while(n.hasNext()){
String readOperations = n.nextLine();
String [] command = readOperations.split("[
]");
}
n.close();
}
catch (FileNotFoundException e){
System.out.print("Error...TV in need of repair!");
}
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Mar 30, 2015
i am trying to write a program in which the user will select a text file(which contains information that the graphical output will be based). I have successfully set up my file chooser however when i select the text file,i do not get any graphical out put. please see attached .zip file for code.
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Jan 13, 2014
I am trying to test values stored in 2d arrays once but i my program just keeps looping what am i doing wrong
Java Code:
tempi=i;
tempx=x;
for( i=0;i<3;i++) {
for( x=0;x<4;x++) {
if(rounded[i][x]<395 || rounded[i][x] >405) {
System.out.println("there is an error with probes "+rounded[i][x]);
[Code] .....
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