Calling Element Of Array From Different Class

Mar 13, 2014

So I just finished up my term project and have everything working but I wanted to make one slight adjustment to the code and Im not exactly sure what I'm doing wrong - it involves retrieving a set element from an array from a different class so to some what show what I have going on:

public class example1 {
private example2 Examp;
public example1() {
Examp = new example2();
} public void getArray() {
if(Var >= 10 && Var <= 20) {

[Code] ....

I have an if statement that looks at a sum of numbers, and predetermined upon the set of numbers I want it to output a message by calling the index number in the array and returning the string. I currently just have the message in the if statements but would be nicer to just pull them from a different class to keep it consolidated.

View Replies


ADVERTISEMENT

Accept Array Of Ints And Squares Each Element Of Array

May 13, 2014

I need to write a method that accepts an array of ints and squares each element of the array. No creating new arrays and no returning any values.

public void squareInts(int[] ints) {
for(int i = 0; i < ints.length; i++) {
ints[i] = (ints[i] * ints[i]);
}
}

View Replies View Related

Servlets :: Calling DoGet Of Child Class From Service Of Parent Class

May 28, 2014

Regarding the lifecycle of servlet , in headfirst servlet i can find :

You normally will NOT override the service() method, so the one from HttpServlet will run. The service() method figures out which HTTP method (GET, POST, etc.) is in the request, and invokes the matching doGet() or doPost() method. The doGet() and doPost() inside HttpServlet don’t do anything, so you have to override one or both. This thread dies (or is put back in a Container-managed pool) when service() completes.

How can I call the doGet method of the subclass from the superclass. i am not getting this .

View Replies View Related

Calling Method Of Another Class Which Is Implemented By Runnable Class

Aug 11, 2014

i am having a problem while calling a method..i am having a class

Java Code:

public class MySer implements Runnable {
public void getMessage(String msg)
{
...,
}..,
} mh_sh_highlight_all('java');
i use the above class in another class

[code]....

View Replies View Related

Creating Object Of Class And Calling Its Method In Different Class

May 20, 2015

In the process of creating a new class, I need to move my main method from the class SaveDate to the class DynamicTest. Below I have listed the code of both classes.The objective is to be able to run my program from the DynamicTest Class. I need understanding the process of moving my main method to a different class and creating an Object of a class and calling its method.
 
public class SaveData { 
  private static final Map<String, Object> myCachedTreeMap = new TreeMap<String, Object>();
   public static final List<String> getLines(final String resourceParam, final Charset charset) throws IOException{
  System.out.println("Please get: "+resourceParam);
  if (myCachedTreeMap.containsKey(resourceParam) ) {
  // Use the cached file, to prevent an additional read.

[Code] ......

View Replies View Related

Calling Method Of A Class From Main Class?

Aug 31, 2014

// Add range to Vehicle.
class Vehicle {
int passengers; // number of passengers
int fuelcap; // fuel capacity in gallons
int mpg; // fuel consumption in miles per gallon

// Display the range.
void range() {
System.out.println("Range is " + fuelcap * mpg);

[Code] ....

I'm compiling it in Eclipse and this continues to show in the console display

Minivan can carry 7. Exception in thread "main" java.lang.NoSuchMethodError: Vehicle.range()V
at AddMeth.main(AddMeth.java:34)

View Replies View Related

Smallest Element In Array

Nov 7, 2014

I have been working on this assignment for a bit now. I seem to have most of the logic of it down, as far as I can tell, but I seem to have fallen into a bit of a brain lapse when it comes to invoking methods I've made in my main method. Here's the code:

package Module5;
import java.util.Scanner;
public class Exercise6Nine {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter 10 numbers.");
double[] numbers = new double[10];

[Code] .....

My question is, in my main method, I have code in there to attempt to call my method "min" from below, and to use the result of the min's calculations and print them via my main. Only, I can't seem to properly invoke the method from my main method!

Also, if you could check over my min method and see if anything blatantly wrong is there and let me know, that would be great.

Looking over my question, and it seems there is no EDIT button, but I may as well put the assignment parameters here, since I asked for double checking on my method. Write a method that finds the smallest element in an array of double values using the following header:

public static double min( double[ ] array )

Write a test program that prompts the user to enter 10 numbers, invokes this method to return the minimum value, and displays the minimum value.

View Replies View Related

Generate 10 Random Integers / Store In Array And Then Calling A Method To Display Array

Nov 8, 2014

So I need to generate 10 random integers in the range 1-20 but i have to store them in an array called numbers. Then I have to call a method called displayArray which displays the contents of the array and for the assignment i have to use a for loop to traverse the array. The method header for the displayArray method is:

public static void displayArray(int[] array)

This is what I have done
 
public class RandomIntegers {
 static int numbers = 0;
public static void displayArray(int[] array) {
System.out.println(numbers + "Numbers Generated");

[Code] .....

View Replies View Related

Adding Space Between Each Element Of Array

Dec 8, 2014

I have been trying to space out output on a Java console window so that I have three columns with 6 rows of data from three different arrays. The code I have so far outputs the data with no problem however the spacing between the columns is uneven. My loop so far is made up as follows

for (int i = 0; i < printVotes.length; i++) {
System.out.println(printNames[i] + "
" + printVotes[i] + "
" + printPrecent[i] + "%");
}

As you can see I have been manually adding the space between each element of the array but this means that the space between each element is different because the size of each element is different if work out a loop that works out an even amount of space between the elements and then print this along with the elements ....

View Replies View Related

Adding Element From Arraylist To Array

Sep 11, 2014

So I'm trying to write a method which returns the number of vowel characters in arraylist. My idea is to convert the arraylist element by element to array each time iterating through the array counting the vowels of that element. When I started I immediately got an error(surprise, surprise). Excuse me if the problem is too simple, but I am very new to programming.

At line 9 I get the following error "Type mismatch: cannot convert from String to int". I want to get the element at this position, not to convert to int..

ublic class One {
public static void main(String[] args) {
ArrayList<String> bla = new ArrayList<String>();
bla.add("aaa");
bla.add("brr");
bla.add("unn");
}
public static ArrayList<String> averageVowels (ArrayList<String> list){
String[] arrListWord = list.toArray(new String[list.get(0)]);
return list;
}
}

View Replies View Related

Each Bar In Graph Will Represent Value Of Each Element Of Array

Nov 5, 2014

So I have an array which holds 19 elements, each element represents a value of 'income'. I'm trying to code the graph so that each bar will represent the value of each element of the array (income). I have been given the code ' for (int Bar = 0; Bar < array of values.length; bar++);' however i'm unsure if this is how to do it, or what to add to this code to make it work.

View Replies View Related

Shuffling Array - Swapping Every Element

Aug 25, 2014

While shuffling an array, if I use Collections.shuffle(), there is a chance that an element in a particular index in the input array can be present in the same index in the output array. Is there an existing method that handles that too? If not, how can I best handle it? After shuffling, will swapping every element with the last element work?

View Replies View Related

Comparing String To Array Element?

Oct 17, 2014

I have the following code:

Java Code:

public class Equals {
String[] s1 = {"red", "white", "black", "blue"};
String[] s2 = {"red", "black", "green"};
String[] s3 = {"red", "green"}; mh_sh_highlight_all('java');

What I need is to give me the following output:

Select Strings: s1,s2,s3
Comparing String s1, s2, s3

red 3 matches.

black 2 matches.

green 2 matches.

View Replies View Related

Print Duplicates Element Of Array

Apr 16, 2014

This code is not best way to find the duplicate elements in a given array. Any alternative method for an optimized code.

Java Code:

import java.util.Arrays;
public class Find_Dupliicate_ArrayElement {
public static void main(String[] args) {
int[] Array1 = {1, 9,8,1,2,8,9,7,10, -1, 1, 2, 3, 10, 8, -1};
// Store the array length
int size = Array1.length;
//Sort the array
Arrays.sort(Array1);

[code]....

View Replies View Related

Comparing String To Array Element

Oct 17, 2014

I have the following code:

public class Equals {

String[] s1 = {"red", "white", "black", "blue"};
String[] s2 = {"red", "black", "green"};
String[] s3 = {"red", "green"};

What I need is to give me the following output:

Comparing String s1, s2, s3

red 3 matches.
black 2 matches.
green 2 matches.

View Replies View Related

How To Extract First Digit From Int Array Element (java)

Nov 18, 2014

How do you extract first int digit from an int array element (java)?

if a[3] = 45, how do I extract 4 out of 45?

View Replies View Related

How To Retrieve Index Of Specific Element In Array

Mar 3, 2015

I'm trying to iterate through an array of integers and find the start position of the part of the array containing the most consecutive 1s.

For example given the array {1,3,1,1,1,1,5,3,2,1,1}, the method should return 2 and given {1,4,5,1,1,1,5,1} the method should return 3.

So far, I've managed to retrieve the element where the consecutive 1s begin. However, I'm unsure how to get the index of this element and this implementation doesn't work if there is more than one set of consecutive 1s.

public class GetIndex {
public static int getPosition(int[] myArray) {
int index = 0;
int tracker = 0;
int mostOnes = 0;
for(int i = 0; i < myArray.length; i++) {

[Code] .....

View Replies View Related

Using Mutator Method To Set Data To Array Element

Jun 2, 2014

the problem I'm having is I want to use a mutator method to set data for an array element. The code I have so far is:

public void addProduct(String productName)
//Goes through and sets the name of a product and assigns it to the array
{
int index;
for (index = 0; index < product.length(); index++)
{
product[index].setName(productName);
numberOfProducts++;
}
}

The array was initialised like this:

Product[] product = new Product[3];

And the setName(String) method is just your typical mutator method.However, in Eclipse, I have an error messages. It is:

"-The method setName(String[]) is undefined for the type String" .....

View Replies View Related

How To Find Maximum Element Of Each Column In 2D Array

Oct 26, 2014

import java.io.IOException;
public class Largestcolumn
{
public static void main ( String[] args ) throws IOException
{
int largest = 0;
int newnumber = 0;
int[][] data = { {3, 2, 5},

[Code] ....

When I run this code, I get this following output: The largest element in column 0 is: 9.
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4
at largestcolumn.Largestcolumn.main(Largestcolumn.java:27)
Java Result: 1

It outputs the first column's maximum element but then throws an out of bounds error. I'm new to Java and I can't figure out how to fix my code so that it will work for this multidimensional array and output the maximum elements in all of the columns.

View Replies View Related

How To Access Element Of Multi Dimensional Int Array Using For Loop

Jul 12, 2014

I have written following code.

I want to print all elements in Array to output here is my code

int[][] arr={{12,12,13},
{14,1223,14}};
for(int i=0;i<arr.length;i++)
{
for(int j=0;j<arr.length;j++)
{
System.out.println(arr[i][j]);
}
}

but I am getting following output

12
12
14
1223

how to print all elements of int array?

View Replies View Related

Nested For Loops - Check If There Is A Duplicate Element In The Array

Aug 4, 2014

Nested for-loops always throw me in a loop.I found a snippet that uses 2 for-loops to check if there is a duplicate element in the array:

/*
* brute force way of checking if array contains duplicates in Java comparing each elements to all other elements of array complexity on order of O(n^2) not advised in production
*/
public static boolean bruteforce(String[] input) {
for (int i = 0; i < input.length; i++) {
for (int j = 0; j < input.length; j++) {
if (input[i].equals(input[j]) && i != j) {
return true;
}
}
}
return false;
}

Let us say we have:
String[] input = new String[] {"one","two","three","one"}

View Replies View Related

Add Element As Third Element Of Stack Without Changing Rankings

Jun 1, 2014

I want to run a program to add an element as the third element of stack without changing rankings, I am trying to use two stack and I don't know how to push the top of first stack in the second: push(top(); this line

public void ADD(int element,int i ){
if(isEmpty(true)){
push(element);}
else{ makeNull();
while((i<=3) && (isEmpty(false))){
push(top();
}

View Replies View Related

User To Input 10 Numbers - Find Smallest Element In Array

Dec 2, 2014

I am trying to write a code that asks the user to input ten numbers and then finds and displays the smallest number out of the ones given. I am supposed to implement arrays into the program to do this. But the problem I have run into is that when I compile the code in jgrasp, I am given several error messages and I am not quite sure what I have done wrong. I'm assuming it is either a syntax or a logical error on my part but reading over the code I do not understand what is causing these errors.

This is the most current draft of my code:

import java.util.Scanner;
 public class Exercise7_9 {
public static void main(String[] args) {
double[] numbers = new double[10];
//Enter ten double numbers: Scanner(System.in)
java.util.Scanner input = new java.util.Scanner(System.in);
System.out.println("Please enter ten numbers: ");

[Code] .... 
 
/* Sample Run:
Enter ten numbers: 1.9, 2.5, 3.7, 2, 1.5, 6, 3, 4, 5, 2
*/

And these are the exact error messages:

----jGRASP exec: javac -g Exercise7_9.java
Exercise7_9.java:35: error: '.class' expected
if (double m > list[i]) {
^
Exercise7_9.java:35: error: illegal start of expression
if (double m > list[i]) {

[Code] .....

View Replies View Related

Create For Loop That Randomly Assign Values To Each Element Within Array?

Apr 16, 2014

Started learning about Array's I'm doing an exercise where you create a for loop that randomly assigns values to each element within the array, but where is my code going wrong?

import java.util.Scanner;
public class ArrayExamples{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
double exampleArray[] = new double[5];
System.out.print("Enter a Number: ");
int num1 = input.nextInt();

[Code] .....

View Replies View Related

Calling Another Class

Jun 14, 2014

So heres the code for one of my classes..

import java.awt.*;
import javax.swing.*;
public class Splash extends JPanel {
public void paint (Graphics g)

[code]....

Now, when i call it from a different class in the main method, like this:

new Splash();

View Replies View Related

Calling Method From Within A Class

Sep 15, 2014

I am calling a method from within a class like so:

xmlWriter.updateFile(environment, doc);

The class is xmlWriter & the method is updateFile

updateFile passes Environment environment (another class) and Document doc (document builder)

but I am unsure about it passing these through the parameters in the method call..is it correct?

Also underneath that method call for the update could I then do another method call for the export method of the file?

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved