Read Float Numbers From A File / Put Them In Array And Sort

Jun 30, 2014

I'm supposed to write a program, which reads float numbers from a file, puts them in an array and sorts the array. After that I'm suppose to add the numbers so that when I add the 1 and 2 number of the array, I'm suppose to save the sum on the position of number 1, then I add number 3 and 4 and save the sum on position 2 etc. Also if my array has an uneven number of floats it's suppose to add the last 3 and not 2 numbers in the last iteration. The problem is the method throws an ArrayOutOfBounds Exception but I can't seem to find my mistake.

That's the second method. The first one just stores the sum in another variable and then returns it. Also is there a way in that I can Scanner/File/array etc. and initialize the array only once so I don't write the same code two times like it is now.

package sumOfFloats;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Arrays;
import java.util.Scanner;
public class SumOfFloats {
public static float sumFloats() throws FileNotFoundException{

[Code[ ....

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Read Data From File And Place Larger Of Two Numbers In Corresponding Position Of Third Array

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I am learning about arrays in my class and my professor has a habit of throwing in code without explaining. We are doing a program called storing largest numbers where we read data from a file and place the larger of the two numbers in the corresponding position of a third array. They are in 4 by 4 format. Here is the ending code

import java.io.*;
import java.util.*;
public class prog464aStoringLargestNums
{
public static void main(String[] args)

[code]....

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[ public class Array1
{
public static void main(String[] args)
{
int array [ ] = new int[100];
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{
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Apr 20, 2014

I am trying to write a Float Array to a file but it is only writing the last line of the array to a file. I have also attached the entire assignment as a zip file with all required files. Here is the part of the code I am having issues with:

Java Code:

for (int i = 0; i < differenceArray.length; i++){
System.out.println ("Date: "+ dateArray[i] + " Opening: " + dataArray[i][2] + " Closing: "+ dataArray[i][5] + " Difference: " + differenceArray[i]);
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writer.write(Float.toString(differenceArray[i]));

[Code] .....

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Feb 19, 2014

Code below. I am not sure if my logic is correct. I want to prompt a user to enter registration numbers from 100 to 1000, store the numbers in an array then sort them.

import java.util.Scanner;
class regnumber
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
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I'm making a program that will read the file and put the numbers in a list of int arrays and names in another list of strings. In my program i created two classes. One will receive the numbers and the other will receive the names. But i only can read the numbers! How can I read everything and separate into two different lists?

try( BufferedReader br = new BufferedReader( new FileReader( jFileChooser1.getSelectedFile().getAbsolutePath() ) ) ) {
hist = new Historic();//Will recieve the array of numbers.
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[Code] ...

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Dec 8, 2014

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The part i am really struggling with is taking the data from the text file and creating an object array with it using the product class. Once ive accomplished that, i have to use that data to create a random access file with the data.

Here is the base Product class that must be used to create the objects for the array.

public class Product
{
public String pName;
public String stringName;
public double price;
public int quanity;

[Code] .....

And then here is the data from the text file that i must extract to use to create product objects.

Dill Seed,938,34
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(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
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[import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

[Code]....

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Mar 21, 2015

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public static void students(String file) throws FileNotFoundException {
try {
File studentInfo = new File(file);
Scanner input = new Scanner(studentInfo);
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Jan26081.5910211.79
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Nov 17, 2014

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The text file has the numbers stored like so :
148
626
817
4
312
652
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etc....

I gather that I'll probably have to user the Scanner for the user to input the text file name, but how do I store it to an array? So far I only have the bones of the program done, like so

import java.util.Scanner;
public class SortingAlgorithms {
public static void main(String[] args) {

[Code].....

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4 4
FILE
WITH
SOME
INFO

I have been able to read the file but when I am trying to run my program I have blank spacing instead of an array.

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

[code]....

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I have pasted the log and below is the code.

DEBUG - 7053CFEF4819D884638A42F088B507C3:/EntryPoint_1000 : session id:IVREPMSUAT2-2015083130037-4 |
Comm_DBinteraction-trcITELOutput | V_COUNTERTYPE:: | v_counterType : 1,2,3,4,5,6,7,8,9,10
DEBUG - 7053CFEF4819D884638A42F088B507C3:/EntryPoint_1000 : session id:IVREPMSUAT2-2015083130037-4 | Consult_IVR_3000:Comm_DBinteraction-trcITELOutput | V_SPENDINGLIMIT:: | v_spendingLimit :,500.0,59.5,0.0,1101.0,581.5,393.0,0.0,0.0,0.0

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Oct 28, 2014

I am trying to read numeric values from a text file into an array. This is what i have so far but when i compile it, it doesn't run and give me a result.

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
public class question2_17110538 {

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Content the file:

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Nov 15, 2014

I'm trying to figure out the necessary code for reading integers from a text file, then placing them withing the two-dimensional array I have created, and then finally printing the array using a nested for-loop. I have attached the file I would like to read from. I'm having trouble figuring out how to reference the text file with the integers, and also how to properly create a dynamic preface for each row of the array. I want the preface to display as "Week #: ", with # being the row number. I tried to create an integer to be used that way, but NetBeans tells me whatever integer I declare has already been defined in method main. I know I need to use scanner to read the file. I would like the output to display like this:

Quote
Temperature Data

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Week 2: 76 73 72 72 75 79 76
Week 3: 79 82 84 84 81 78 78
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public static int search(int searchnum, float[] nums){
int low = 0;
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[Code] ....

This is working for the example but I would like to know if it is considered 'efficient' or even good?

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Oct 10, 2014

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Here is the code I have so far:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class Main
{
public static void main(String[] args) throws FileNotFoundException

[Code] ....

And this is the error I am receiving when trying to accomplish the goal of the project:

Exception in thread "main" java.lang.NumberFormatException: For input string: "############"
at java.lang.NumberFormatException.forInputString(Unk nown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at Maze.<init>(Maze.java:15)
at Main.main(Main.java:20)

What's going on here and how I can correct this?? The information I am trying to store in a 2D array and then print is this:

############
#.#........#
#.#.######.#
#.#....#...#
#.###.*#.#.#
#...####.#.#
#.#.#..#.#.#
#.#.#.##.#.#
#o#......#.#

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}
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Feb 10, 2015

I am working on my homework, and everything is fine. But I was wondering if I can fix one thing. basically it prompt from a user for a text file name and save the content as an array. some part of my code is here:

public class arraysort{
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[Code] ....

As you you may figure, it works if I put numbers separated by each lines. I was wondering if I can change it so that it works when I put numbers separated by space rather then each lines.

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