Sorting Data Alphabetically By Second Name In A File?
Apr 11, 2013
I have a problem sorting this file alphabetically by second name. Basically, my method sorts each column alphabetically but i would like to sort the file according to the second name.
File:
Moe Carl
Saul Sergio
Rocky Louis
Ike Ziken
This is how my method sorts the file:
Ike Carl
Moe Louis
Rocky Sergio
Saul ziken
Instead
Moe Carl
Rocky Louis
Saul Sergio
Ike Ziken
So we have to create a code that reads in a file that has a huge list of words. Our code has to convert every word to all lower cases and then re-sort alphabetically. I was able to turn everything to lower case, but for the re-sorting I keep getting a null pointer exception on the line of the if statement.
import java.io.*; public class readDict { public static void main(String args[]) { try { System.out.println("Opening the file...");
How to sort data from a .csv file. The file has a column that contains duplicate groups, and a column that has duplicate employee id's. I need to take the data and sort it into rows. The employee's id will be in the first column, then the groups the employees belong in will occupy the following columns. The groups and employees are dynamic.
groups| empId ----------------- Group A| a1234 | Group A| e3456 | Group A| w3452 | Group A| d3456 | Group A| j7689 | [Code] ....
I want to format the .csv as follows:
-------------------------- empId | group 1 | group 2 | -------------------------- a1234 | group A | group B | --------------------------- w3452 | group A | group B | ---------------------------
how to sort my text file. So far I have been able to read the text file and print it back out, but I am unsure of how to go about sorting it. Must print the colors (in the order of the rainbow first) and if the colors are the same compare the size (bigger is more important)The values I have to sort are written as such in the text file:
blue 18 blue 10 red 27 yellow 4
public class Rainbow{ private String color; private int size; public Rainbow(String color, int size){ this.color = color; this.size = size;
[code]....
I would know how to sort it if it was supposed to be alphabetical order or there were only numbers, but I can't seem to figure out how to sort it when there are strings and integers
I have a program that writes a user's input to a file.
The input consists of several loops. In each loop the user enters a student number, the student first name and last name and then several exam results. Each student has different number of exams, depend on the user input.
For instance, the input can be (explanations are in brackets but not in the actual file):
I need to write a program that reads that file and writes it to the screen, but it needs to do it in ascending order according to the student number.
Leaving aside the format it will be displayed on the screen, my question is how should I sort the data by the student number?
I though about first reading each student as an array, but my problem is that each array contains different number of elements (depends on the number of exams) and also each array containד both strings (first and last names) and ints.
I have a database of peoples names linked up to a from to enter a new employee.The form has a previous and next button that should cycle through the employees alphabetically.What im doing the cycle by now is ID which isnt in alphabetical order and just goes by the order they where entered in.
Is there any way to cycle through alphabetically instead? Is running a query each time the next/previous button is pressed the correct way or should it just grab all the names in the array. Theres probably 150 names.
I would like to understand how does multipart/form-data works during file upload scenario's, Does it chunks the data from client to server while transferring the files ?
By using FileReader, FileWriter and their constituents, I am creating a file to contain employee information ( name, age, hours, etc. ). The user is to input all of the data on a single line and we were asked to implement StringTokenizer to assign that data to the file. I have never used the StringTokenizer before, but I have a rough idea how it is to function. I used pw.println to test what I have so far, now I would like to let the user build the initial file with the "first employees" of the company, and then view the file, and then go back and append new employee data to that same file. My question is, how can I take the user input as a StringTokenizer and add that to the file?
In the for loop below, I thought I would see if it would work, but it does not. The loop only executes once and does not allow me to enter data.
public class Records { public static void main(String [] args) throws IOException { Scanner input = new Scanner(System.in); FileWriter fw = new FileWriter("dbs3.java"); BufferedWriter bw = new BufferedWriter(fw); PrintWriter pw = new PrintWriter(bw); System.out.println("NEW EMPLOYEE DATA SHEET"); System.out.print("Number of new employees: "); int number = input.nextInt();
I am trying to remove a line based on user input. myFile.txt looks like:
Matt Brian John
However when I enter "Brian" (to remove this line), It is deleted on the temp file (myTempFile.txt), but not renamed back to the original file (myFile).
I am creating a program where it reads the data inside a file and then places this data into arrays. The file I created has numbers 1-30 in it, file named, testing1.txt .
At the moment I am studying it and the problem is Taking a range of names in an array and outputting them alphabetically, But for some reason I get an outOfBoundsException. And its starting to get to me. How to put the code in
I have a project requiring me to build a program having a user input 3 words, sort them alphabetically and output the middle word. I have done some searching and seem to only come back with results for sorting 2 words. I so far have code to get the user input but I am completely lost as to how to sort them alphabetically.
import java.util.Scanner; //The Scanner is in the java.util package. public class MiddleString { public static void main(String [] args){ Scanner input = new Scanner(System.in); //Create a Scanner object. String str1, str2, str3; System.out.println("Please enter three word words : "); //Prompt user to enter the three words
[Code]...
we havnt done arrays yet and I THINK i have to do compareTo.....how to use it?
I'm having trouble with sorting Strings- 3 strings inputted by user, and I would like to output them in alphabetical order. I've used the str.compareToIgnoreCase method, and then I've tried to loop them through a series of if/ else statements. Everything I've been able to find online (including the forums here) has suggested to use the Comparator class, or to put the strings into an array, and sort list- I really would like to stick with just the String class, and its methods .
The program itself works and compiles, but I am getting logic errors that I have been unable to solve. I'm using IntelliJ Idea, and I've ran it through the built in debugger, about 100+ times (not exaggerating, lol) just to see what it's doing in particular scenarios. For instance, I can get c, a, b, to print out as a,b,c correctly, but a,b,c, will print out as b,a,c.
For me this is kind of like a Sudoku puzzle, or a Rubik's cube! Each time I fix one scenario, it breaks another one, so I don't know if there's a(logic) solution to fix all possible scenarios (abc, acb, bac etc... to all print abc) or if possibly I just need more if statements. I've only pasted in the area where I'm having problems (the if statements). I'm a big fan of the "Next Line" syntax.
(Note: please assume the non relevant content- import Scanner class, main method, etc... I didn't want to paste the entire program.)
System.out.println("Enter the first statement: "); //input.nextLine(); string1 = input.nextLine(); System.out.println("Enter the second statement: "); string2 = input.nextLine(); System.out.println("Enter the third statement: "); string3 = input.nextLine();
New to programming. Am supposed to create a program that reads a text file (of integers) and computes a series of computations on these integers. I don't have the code for the integers in my code yet, (i know how to do those), but am struggling getting the array to simply print in the print writer. I have the user select a text file, read the file with a scanner, and then save the computations done from my code into another file. specifically, the problem is as follows: Write a program that uses a file chooser dialog to select a file containing some integers. The file contains an integer N followed by N integers. The program then uses a file chooser dialog to let the user specify the name and location of an output file to write results to.The data written to the output file will be as follows
(1) The original list of N numbers from the input file, (2) The original list of N numbers printed in reverse order of how they appear in the input file. (3) The sum and average of these numbers, (4) The minimum of all the numbers, (5) The maximum of all the numbers.
I have a small application that I have been working on for several months. It works great. Now when I created an executable .jar file for it, it will not load data from a .csv file. I have tried looking into everything I can think if. I checked file paths, etc. I am using OpenCVS to read the csv. Is there an issue with that when you include it into another .jar file? I am trying to log if there is an error but I don't even get an error. I just doesn't run past that statement...
I have an xml file whose data needs to be validated with 250+ rules, the size of the xml can range from 4MB to 50 MB. Have the following questions.
1. Where the Rules should be defined, as i would like them to dynamically controlled(instead of hard coding) 2. Given the size of the data and input being xml, how should i approach this problem(considering the rules might change etc) 3.The names of the UI and XML tag names will be different, so when should the translation takes place
Following is the structure of the xml :
<DATA> <Parent> <Fields> //All the data like name, age, height, weight, blood group etc goes here </Fields> <Childs> <Name = 'Andrew' id = 7560>
I need to write a program that, when a button is pressed, will add the user input to a table AND write it to a sequential data file. I have everything done accept for how to write the data sequentially(all input data on the same line in the file). The following is part of the code:
private void submitButtonActionPerformed(java.awt.event.ActionEvent evt) { DefaultTableModel dtm = (DefaultTableModel)jTable1.getModel(); dtm.addRow(new Object[]{donorName.getText(),charityName.getText(),donationAmmount.getText()}); //Adds user input to the table try { FileWriter writer = new FileWriter("FundraisingInformation.txt",true);//Creates file or adds to it BufferedWriter bw = new BufferedWriter(writer);
[code].....
I would need the file output to be in the following format:
donorName charityName donationAmmount
As I said, using the .write(bw) i know how to make it look like:
I am trying to save the data a person enters to a file. See code below. It is compiling however the file created only shows largest =89, i want the file to show all the data a person enters.
import java.util.*; import java.io.*; public class LargerOfThree3{ public static void main(String args[]){ Scanner in = new Scanner(System.in);
