I have double checked this code over and over and I just can't find the problem.
What I'm trying to do is take a file and input it into an 2D array.
Ultimately, I should convert the array of integers to an array of characters, then print it out. The file contains a set of ASCII values.
After printing it out, I should then create methods to manipulate the image produced.
Using 2D arrays is a requirement for this exercise.
I think that somehow I'm overcomplicating this and the solution is a lot more simple than I think, but I can't think of what to change.
The error I am getting is:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 40 at main.main(main.java:17)
Java Code:
import java.util.*; import java.io.*; public class main { public static void main(String[] args) throws FileNotFoundException { String[][] data = new String[22][40];
Is there a better way to scan a character array for digits and replace any number in the array with another character ("*") in this case? The array is the address, " 1234 Runner Road " .
As of right now my code can take characters from a string to an array from a string like "ABCD" but the project says I have to take it from a string like "A B C D" how can I correct my code to grab the characters from a single spaced line?
Scanner sc = new Scanner(System.in); System.out.println("Enter Order of Cars:"); String carsInput = sc.next(); int x = carsInput.length(); int[] cars = new int[x]; for (int i=0; i < cars.length; i++) { cars[i] = carsInput.charAt(i)-64; }
I am trying to change an input String to an array of characters, but it only stores the word before the space into the array. Here is the code:
Scanner scanner = new Scanner(System.in); System.out.println(" Enter text: " ); String text = scanner.next(); char[] characterArray = text.toCharArray(); // convert string to array of characters String char = ""; for( i = 0; i < characterArray.length; i++) { char = char + characterArray[i] } System.out.println(char);
Just typing hello gives me hello, but when I type hello world it does not type in the word "world".I am trying to change an input String to an array of characters, but it only stores the word before the space into the array.Here is the code:
Scanner scanner = new Scanner(System.in); System.out.println(" Enter text: " ); String text = scanner.next(); char[] characterArray = text.toCharArray(); // convert string to array of characters String char = ""; for( i = 0; i < characterArray.length; i++) { char = char + characterArray[i] } System.out.println(char);
Just typing hello gives me hello, but when I type hello world it does not type in the word "world".
The point of this program is to read characters from a txt file and store them into a 2D array. After this has been accomplished, the information is to be printed in the same manner it is read from in the txt file.
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:
I am making a little game for my friend based on HTML and javascript and i was wondering how to play an audio file that i downloaded on to my computer without the user interacting. like a buzzer you would hear on jeopordy or something like that, creating a Wrong answer buzzer and a right answer buzzer into an if/else statement.
I am taking the Class Algorithms and Datastructures and got an assignment for Lab that really throws me off. The goal is to create an Array out of a given CSV file, implement several Methods that get the size of array, etc.
I am still stuck in the first part where the CSV has to be imported into the Array. My problem is that I need a mechanism that figures out the needed size for the Array, creates the array, and only then transfers the data from the CSV.
The list consists of the following wifi related values:
MAC-Adress, SSID, Timestamp, Signalstrength.
These are on the list, separated by comma. The Columns are each of these, and the rows are the four types of values making up the information on a certain wifi network.
The catch is, we are not allowed to use any of the following:
java.util.ArrayList java.util.Arrays and any class out of java.util.Collection.
So far I used the BufferedReader to read in the file and tried to implement the array, but I get an arrayindexoutofboundsexception.
Below is my Code (Its still an active construction zone):
public class WhatsThere { public WhatsThere(String wifiscan) throws IOException { } public static void main(String[] args) throws IOException { // WhatsThere Liste = new WhatsThere(String wifiscan); String[][] arrayListe = new String[0][0];
Does the following code, which gets a class from a remote server, caches the class on the client machine?
URL u = new URL("http://1.2.3.4:80/JavaClasses/MainClass.class"); InputStream input = u.openStream(); DataInputStream data = new DataInputStream(input); byte classBytes[] = downloadByteCodesFromURL(data); Class c = defineClass("MainClass", classBytes, 0, classBytes.length);
I have downloaded the target page's html-file successfully, but how can I find out WHEN that version had its latest update?
Here's how the page is downloaded:
public void dlPage(URL url) { try { br = new BufferedReader(new InputStreamReader(url.openStream())); fileOut = new BufferedWriter(new FileWriter(url.getHost()+".html")); while( (line=br.readLine() ) != null ) { fileOut.write(line); fileOut.write("
[Code
I was thinking of using URLConnection's method getLastModified() for comparison. But dont have a clue how to read it from this file. Am I perhaps solving the download-part incorrectly?
I wrote a code to download a zip file in jsp, but it is not working as expected, when i execute this following program i am able to download file with "download_all.jsp" name, but now original download file (/tmp/Download_All/1244687508907.Zip). The download_all.jsp is my jsp name which is having the following code. Here is the code snippet:
try { String filename = "/tmp/Download_All/1244687508907.Zip"; if(request.getParameter("filepath")!=null){ filename=request.getParameter("filepath"); } // set the http content type to "APPLICATION/OCTET-STREAM response.setContentType("APPLICATION/OCTET-STREAM");
I have an array with the following characters {'E', 'L','E','P','H','A','N','T','P','O'}
now, I need an array that will store the first array such that only the occurence occurs e.g {'E','L','P','H','A','N','T','O'} Notice that the characters 'E' and 'P' occur twice and as a result were not repeated the second time in the new array.
How would one go about this using the counting elements technique?
I tried this but not sure how to use the counting elements technique.
char [] arr = new char{'E', 'L','E','P','H','A','N','T','P','O'}; char[] bucket = new char[(arr[0] * arr.length)]; for (int i = 0; i < len; i++) bucket[arr[i]]++;
So as part of my program I have to find the corners of an array (the array can vary in size but is always square) but I'm not exactly sure how to do this. I thought of one possible way but I am not sure if I can do it or how to write it,
if array[row][col] = [0][0] or [row length][col length] or [0][col length] or [row length][col length].
I'm just giving examples of what I am trying to find here I know none of these are actual syntax. I don't even know if I can check whether an array's coordinates are equal to coordinates on that array or not. How I can write this or if there is another way to do it? If yes, what about edges of the array?
I have a given array of numbers, and I have to find the longest decreasing sub-array, but the thing is that the elements don't have to be next to each other!
For example, the longest decreasing sub-array for this array : 546 -156 165 -156 -56 -13 5
is 3 (check the bold numbers)
Until now, I have nearly finished my code, but I have one problem...
private static int decreasing(int[] a) { int result=1, temp=0, br=1; //Checking all the elements one by one: for(int i=0;i<a.length;i++){ temp=a[i]; //placing the element on a temp value
[Code] ....
The problem with this code is that it's not smart.. let's say I have : 100 -500 90 80 70
Once it hits -500, none of the other if's with pass....
what I needed to know to complete the lesson, but now it just tells me what the output should be and I have to research the information on my own. anyways, here is my code from the previous lesson:
import java.util.Random; import java.util.Scanner; public class tnArray { public static void main(String[] args) { int [] array;
[code]....
Now I have to change it so that instead of counting the number of times a number will appear in the array, I must output which slot in the array the number is in.
So what I'm trying to do is write a code in java which finds a path through a maze. I want it to go through the maze and determine if there's a * symbol at that location or not. If there is a * symbol at the specified location then the program would search for another position until it finds one without the * symbol and if it can't then I'll have the program return null. I also want it to implement backtracking which I'm not sure how to do. Here's my code so far
private boolean findPath(int fromRow, int fromCol, int toRow, int toCol){ boolean solved = true; for(int i=fromRow; i<toRow; i++){ for(int j=fromCol; j<toCol; j++){ if (x[i][j] == ('*')){ //do something } } } return false; }
the code isn't finished yet however what I'm not sure is what do I do with the if statement and how do I implement backtracking?
An array which contain a list of names. I let for a user input and I use that to search through the array. For example lets say the string name "Christian" is stored inside the names array and the user types in Chri, the program looks in the array and finds a name that contains Chri and prints them out. How do I go about doing this?
How can I find the overall averages of the columns in this array?when i run my code it gives me an output that looks like this (showing me wrong averages): 0 1 2 3 overall grade
I have 2 arrays in random order of 10 numbers.I need to find the biggest number from array A and B and then when its on a screen second thing is to multiply those numbers by 2.
import java.util.Random; public class Projektas { public static void main(String arng[]){ int i,j; int A[] = new int [10]; int B[] = new int [10];;
I made a method which takes values from a data set and finds out which one is the highest value. When it finds the highest value, it returns the country which is associated with the value. Here's the data set.
"Country""Total CO2 2005 (million tonnes)""Road CO2 (million tonnes)""Road CO2 per person (tonnes)""Cars per 1000 people" 10 USA5951.131530.35.16777 UK2573.4119.681.99470 Italy476.08116.862592 Germany841.78150.211.82550 Canada553.02123.423.82562 France414.03128.132.04477 Russia1575.44114.690.8178 Japan1254.47224.241.76447 China5100.6228.020.317 India1147.4691.060.18
So if the number was 5951.13 then the program would return USA. How do I do that? I've already started on trying to get this code to work but it doesn't seem to compiler so what's wrong with it?
public static CO2Data highest (CO2Data [] arr2){ Scanner sc = new Scanner(System.in); CO2Data highestindex = arr2[0]; CO2Data currentcountry = arr2[0].getCountry(sc.nextLine());
[Code] ....
Also the array is a CO2Data array which is part of the following class:
public class CO2Data { //The CO2Data class will be called in other methods
private String country; //A private variable will prevent other users from accessing and changing these variables.
private double totalCO2; private double roadCO2; private double CO2PerPerson; private int carsPerPerson; public CO2Data() { country = "";//this sets the initial values for the different variables
The program below is intended to find the arithmetic mean of the numbers stored in the array q in two ways: once by storing the numbers in an ArrayList d, where you allow all the necessary conversions to be performed automatically; and once by storing them in an ArrayList e, where you perform all the conversions by hand. Complete the program.
Here is what I have so far:
double[] q = { 0.5, 2.4, 7.4, 2.8, -6.2 }; ArrayList<Double> d = new ArrayList<Double>(); ArrayList<Double> e = new ArrayList<Double>(); for ( double x : q ) { d.add( x ); e.add ( new Double ( x ) );
[Code] .....
Why does it still show "a / d.size?" I thought I fixed that. Whatever, it's supposed to be "dTotal / d.size()", etc.
