I have a program that works, but I would like to know an easier way to record and print from a large array.
Here is what I have
package pa2;
import java.io.IOException;
public class PA2Delegate {
//long[] array = new long[100000];
int arraySize = 100000;
int iterations = 9999;
Long[] array;
[code].....
In my programming class we need to create a large test array of Longs to iteratively sum/reverse the array and recursively sum/reverse the array.creating the array and where to go from there.
View Replies View RelatedI have small problem in GUI. I have a text area which has to display my test orders now what is happening instead of the text showing up in the JtextArea its still printing to the console so this order code (yes i did not use proper code standers) runs though my order class fine but its not loading the text in the JtextArea
Order code
public static String testCase1(){
orders ords = new orders();
System.out.println("Test Case 1: " + "
" + ords.getOrderDetails());
return " ";
My jbutton code :
txtContent.setText(new orderTester().testCase1());
txtContent.setText(new orderTester().testCase2());
txtContent.setText(new orderTester().testCase3());
I have 10 test case to load in the jTextArea
When I insert: title, category, year, artist in 4 Strings And when I press "enter" i put those 4 in a array "large", and then when I can start a new music insert with 4 new string elements and add those in the large array..So: I have an array "large" with the length 19 (or so..)(max ~100 or so)Then I what to: get,in a new array "title",the elements:0,4,8,12,16 (from the large array) and put them in a scrollable list. And when I select one element in the title array I then whant to get 3 remaining elements from this. And put it in a array called selection.
So the "large" and the "title" arrays must be dynamically sizes... or be copied to a larger sized..
1 can it be done with arrays?
2 how do dynamically change the size of for example the array "title"?
3 how do I receive the elements 0,4,8,12,16 and so on, (to (
large.length-3) and add it to the title array?
How do I record the number of times all runs of heads occur. Ex.
Length Number of runs of heads
1 --------------------3
2 --------------------2
3 --------------------0
4 --------------------1
public static void main(String[] args)
{
int [] coinToss = new int[TOSSES];
int longestRun = 0;
int run = 0;
for(int i = 0; i < coinToss.length; i++)
coinToss[i] = toss();
[Code] .....
I have written an algorithm that compares the chars and returns all the found words in a 20x10 puzzle, but not for a 100x50 puzzle.
The puzzles are loaded in via text file and I have confirmed they're loading correctly.
guesses = String[] of search words
puzzle = char[][] of letters
Why it doesn't work on the large array?
Expected output:
word1, word2, word3
Actual output:
[blank line]
Here's the horizontal algorithm (row by row search)
//temp variable
ArrayList<String> temp = new ArrayList<String>();
try {
//for each guess word
for(String word : guesses) {
int count = 0;
[Code] .....
I am working on an assignment covering exception handling and am stuck on part of the assignment. How can you test for array length = 0?
When I try something like: if (array.length == 0) on a null array, naturally I get a NullPointerException. I would try something like if (array != null) but both array length of 0 and null array are supposed to throw different expressions.
I'm making a program for school that reads a text file with answers to a personality test and prints the temperament to an output file. Problem is, it sets the temperament for the first person to INFJ and then prints INFJ for the rest of the people too. My code is below, and the input file 'personality.txt' goes like this:
Betty Boop
BABAAAABAAAAAAABAAAABBAAAAAABAAAABABAABAAABABABAABAAAAAABAAAAAABAAAAAA
Snoopy
AABBAABBBBBABABAAAAABABBAABBAAAABBBAAABAABAABABAAAABAABBBBAAABBAABABBB
Bugs Bunny
[Code] ....
This is my Code :
public static void main(String[] args) throws FileNotFoundException {
welcome();
Scanner input = new Scanner(new File("personality.txt"));
PrintStream out = new PrintStream(new File("output.txt"));
int[][] outcome = new int[4][2];
double[] percent = new double[4];
[Code] .....
So I'm trying to write a program that will take in 5 numbers, store them in an array and then print out the array and the average of the array. Problem is that every time I run my program I get a "ArrayIndexOutOfBoundsException: 5" error and I don't know who to fix it.
public class ConstructorHomework {
final static int size = 5;
static double[] myArray = new double[size];
public static double average;
public void printArray(){
[code]...
I have been creating a Java program to track inventory using an array. I need to add a search function to it to take a term, input through a text field, and locate a matching instance within the array. How can I code a JButton to grab test input from a JTextField and search for it within the array then display the corresponding information? I also need to add buttons to add and delete items as well.
View Replies View RelatedSo for fun I've decided to write a program that can keep track of a simple card game my friends and I designed. I've built a class for an array, that stores the basic stats of each card. I need to be able to access this array from another class, that will print the array information to a file, so we can easily keep track of who's cards have leveled up and their stats. The main class will also be using a random number generator to determine how much damage the attacker/defender deals and takes respectively. So far I have the random number generator built as well. I'm just having issues creating a print to file class and what I need to change in my array class to make it accessible by the other class that prints it to a file.
public class StartingStats {
public static void main(String[] args)
{
//Variable to use for how many spots in a stat array there are
final int statArray = 2;
[code]...
what I need to change so that a print to file class can access EACH array in this array folder. Also if any cookie cutter printToFile class I could use/borrow/change that'd be really useful, as I've never done any printing to file before. Also, the levels of each stat and exp will be changing so that's why I need a separate class to print so that I can call it when it's been updated so we always have the most up to date stats saved.
My array isn't printing. I have tried everything. I have tried putting a nested for loop in different methods but still no luck. I have also tried System.out.print but that prints random characters/numbers.
import java.util.Scanner;
public class Square
{
public static void main(String[] args)
[Code].....
^For some reason the site doesn't show the spaces between the *. It's supposed to be a 5x5 square.
I was having trouble printing the product of the array I am getting runtime errors. Here is part of my code
int [] grades;
grades = new int [10];
grades [0] = 100;
grades [1] = 100;
grades [2] = 100;
grades [3] = 100;
grades [4] = 83;
[Code] ......
I have tried to print array elements using standard print statement. I am getting errors. How to print them. Here is my code:
class arrayEx1{
public static void main(String args[]) {
int a[]=new int[3]; //Declaring Single Diomentional Array
a[0]=10;
a[1]=20;
a[2]=30;
int total=a[0]+a[1]+a[2];
System.out.println("Values stored in a[0],a[1],a[2]elements are :" + a[0] a[1] a[2]);
System.out.println("Total values of a[0],a[1],a[2]elements is :"+ total);
}
}
if i give comma (,) in between above print stament (print statement 1) stil i am getting errors.
Ok, so the program we are supposed to do is to create implement a employee class then create a main tester class that can accept user inputs for 5 employee names, salaries, and performance rating. After that, we have to input code to calculate a provided raise amount, then print out the array with the updated raises. I have completed the program with no syntax errors, but it doesn't do anything. not even a screen comes up on my end to accept user inputs. I know its something basic, but what am i missing
Employee class
public class Employee
{
private String employeeName;
private int salary;
private int performanceRating;
[Code] ....
I want to Display the Index of output Array.
here is the code:
import java.util.ArrayList;
import java.util.List;
public class selection {
private static int[] numbers= { 1, 2, 4, 8, 16, 32, 64, 128, 250, 250, 250, 250, 250, 250, 250 };
private static int[] sumsum= new int[numbers.length];
private static int sum= 1759;
[Code] .....
I want to print each value in the multi-dimensional array using a for loop but there is a problem.
Here is the script:
Java Code:
public class LearningJava
{
public static void main(String[] args) {
int[][] Grid = {
{12, 24, 36, 48, 60},
{1, 3, 5},
[Code] ....
Printing i: 0, x: 12
Printing i: 0, x: 24
Exception in thread "main" Printing i: 0, x: 36
Printing i: 0, x: 48
Printing i: 0, x: 60
java.lang.ArrayIndexOutOfBoundsException: 5
at LearningJava.main(LearningJava.java:11)
It's suppose to get the length of each array and print all the values in that array and then move to the next one.
I tried adding .length
Java Code: for(int x = 0; x < Grid[i][x].length; x++) mh_sh_highlight_all('java');
but then it doesn't work at all.
I am having a hard time trying to figure out how to print random numbers from a an array list. I tried google but nothing worked. I have to pick certain values from two lists and print them on the screen. I have included comments in the code to facilitate the explanation.
import java.util.Random;
public class Parachute {
public static void main(String[] args) {
Random randomNumbers=new Random();
int number;
int array []={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21};
char A[] = {'a', 'b', 'c','d','e','f','g','h', 'i','j','k','l','m','n','o','p','q'};
[Code]...
My assignment was to create a class and then write a program that uses the methods of the class I created. All the output is correct except for the Question # Missed. It prints [I@1dd0fe7. The wrong question numbers have to be stored into an array and that array printed. I've tried using a for loop to print, rearranging the code, setting the code to how I did in the other methods. I either get this [I@1dd0fe7 -or- a bunch of 0's. I'm not sure if I am calling the method incorrectly, or just do not have the correct set-up to print the array, or if I am just not grabbing the ones that are incorrect.
public class DriverExam {
// Fields
private boolean result;
private int testTotal;
private int numWrong;
private int [] numMissed;
private char [] answerKey;
[Code] ....
public class ArrayPrinter {
public static void main(String[] args) {
int[] oneD = {5, 6, 7, 8};
PrintArray(oneD);
}
public static void PrintArray(int[] Arr) {
System.out.println ('[');
for (int i =0; i >= Arr.length; i++) {
System.out.print (Arr[i]);
if (i < Arr.length){
System.out.print(", ");
}
System.out.print (']');
}
}
}
I tried to format this to enhance readability but I'm not sure if I managed to improve it any... This code should be printing the contents of the array with spaces and commas its just printing [. I think this is because Arr is empty for some reason but I'm not sure why it would be when it gets the values of oneD passed to it.
This is my code:
public class rotate
{
public static void main(String[] args)
{
int[] arrayInput = {1, 7, 8, 6, 2};
for(int i = 0; i<arrayInput.length; i++)
[Code]...
It's printing out this (the second line):
I found an exercise online to create a small program . I have this code that I have done so far:
import java.util.Scanner;
public class Test {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
long a = sc.nextLong(); long b = sc.nextLong();
long count = 0; // counter
[code]....
The program should read the numbers a and b and list how many numbers between a and b are divisible by either 2, 3 or 5. If the user types the number 5 and then 8.... it would look at all the numbers in between - 5,6,7,8 and check if any of them are divasable by either 2,3 or 5. And since the numbers 5,6,8 are it would return the number 3 to the user..Now the problem is that this program only works for small numbers, but when I try to input numbers such as 123456789012345678 and 876543210987654321... it doesn't run at all.
So there needs to be a quicker way on how the program checks the numbers divisibility instead of checking each one. Here is where I am lost. How to fix the program that it will read bigger numbers such as a=123456789012345678 b=87654321098765432..There must be a quicker way ...something that can modify the code so it finishes in the matter of seconds not hours. Something that will fasten the process of checking if the numbers are dividable.
I want to migrate some large application code base's from jdk1.4 to jdk1.6.
1. Is there any tool/s available that can be used for this migration (Because manually it is very difficult for a application with almost 15,000 java files and 15 * 10^6 KLOC within a limited time frame).
2. Steps that should be followed in such cases.
3, If any tool is not available for such activity what are the salient points that are needed to be considered while migrating.
I have a simple display method in a java project as given below:
public void displayInfo() {
for(Student student : studentdB){
System.out.println(student.toString() + "
");
}
I would want to use one of Swing components to display the students instead of displaying them on the stdout. How I could go about calling this method in some Swing components that can display all the students in the studentdb?
I need to encrypt/decrypt file contents using RSA . But the default nature of RSA I could not upload files larger than 177 bytes for key length 1024 bytes . How it can avoid , I look it for a 100 times yet...
I attach my encryption files here ...
See attached files for more details ...
What I'm tasked to do, is to make a simple Java class that forms a "V" based on whatever height the user would desire, made out of stars "*", and spaces " ".
For example, if a user desires a "V" with a height of 3, it would look print out something like;
* *
* *
*
Where a "V" with a height of 5 would look something like:
* *
* *
* *
* *
*
(That one didn't look too good, but you get the point, it's suppose to be 5 "high" and shaped like a "V"). The problem I have, is that I don't see what loops within loops within loops I would need to build something like this.
All the easy stuff like asking the user what height they want and such, I can handle, but I don't see how this thing is suppose to be coded, to print out a decent-looking and right-sized "V" in the console.
public static void main(String[] args) {
int height = 3;
for (int i = 0; i < height; i++) {
for (int j = 0; j < 2/(height+1)+1; j++) {
if(j == i) {
[Code] ....
Looked like something of a good start, and it drew me half (!) of the "V" in the size I wanted. Am I on to it here, or am I on the moon in terms of progress? I need the entire "V", not just a nice "".