Displaying ArrayList In Given Sequence
Jan 6, 2014
Jdeveloper 11.1.1.7.0
Currently I am having an arrayList which consits of the yearweekno.
Example: 201303, 201402, 201401,201352,201351,201350,201349.
which means 01, 02,52,....48 are the weeknumbers.
No my question is if I have today's date i.e new java.util.Date...i.e week 01.
How do I arrange the ArrayList as below
201403 201402 201401 201352 201351 201350 201349
That is if current yearweek is 201401 then display should be as above(current week+2, current week, currentweek -4).
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Aug 14, 2014
I have an array list in my GUI class of an aplication , the app reads in 3 fields from the user and saves these to an array list allowing the user to enter more fields to be added to the arraylist, when displaying back out to the user the same entry displays multiple times, for example if i entered , a,b,1 then c,d,2 and then e,f,3 into the app when i press my display button it would just throw back e,f,3 three times rater than the three different entries...
Constructor and instance variables
private String name;
private String number;
private int year;
private int count;
private ArrayList<StudentData> myList;
private StudentData myData;
[Code] .....
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Apr 5, 2014
I have written some error checking code
File name ErrorPage.jsp
<%@ page language="java" isErrorPage="true" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Error</title>
</head>
[code]...
I have put error.jsp and badpage.jsp file in public access folder that is web content in eclipsewhen I am running the code I am status code of 500 and not the errorpage.jsp message .
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Mar 28, 2014
I know my problem is my lack of understanding of OOP but I have searched for a solution and can't even seem to get close.This is a very simplified version of what I will need to do. I have a button and six textboxes. When the button is pressed I want to take the text from textbox6 and place it in textbox1, textbox2, textbox3, textbox4, and textbox5.
I need sometthing better then this brut force method.Java Code:
package textboxes;
public class TextBoxesGUI extends javax.swing.JFrame {
public String NewText;
public TextBoxesGUI() {
initComponents();
[code]....
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Feb 28, 2014
I'm trying to create my own arraylist using Collection. My program doesn't do anything. Obviously, I haven't a clue.
import java.util.Collection;
import java.util.Iterator;
public class MyArrayList<T> implements java.util.Collection<T> {
private int size = 4;
private T[] mArray;
public MyArrayList(String[] args) {
[Code] ....
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Jun 12, 2014
I what to check if value is not equal to CharSequence value
I try this but getting error:
Java Code:
private CharSequence testvalue = "";
if (!isEqualTo("BCDEF".contains(testvalue))){
}
public boolean isEqualTo(String s_src, String s_compareTo) {
boolean flag = false;
[Code] .....
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Mar 23, 2014
Fibonacci Sequence Code:
public class FibSeqByIanNeumann {
public static void main(String[] args) {
Scanner get = new Scanner(System.in);
int ctr, num1, num2, fib, maxTimes;
System.out.print("How many sequences do you want?: ");
maxTimes = get.nextInt(); //inputs the maxium limit of the fib sequence
[code]....
how to do a simple YES/NO Loop so I can try to have it work on my code if I want to try to do the Fibonacci Sequence again.Now I think it might have something to do with a do/while loop.
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Sep 17, 2014
I want to declare integers, while the program is running.
I run the program and then I give it via System.in.println an integer and repeat this as long as I want. I want the program to give those integers a name of a certain type for, for example a(i) or a[i], dunno, (it should be handy) and then a(i) represents the the i'th integer I gave the program. My idea is then that I can use those elements by their name just like, if I had declared them in the first place. For example add two integers together. For example I defined a method add+, which waits for 2 integer and then adds them. For example I write:
add
a(2)
a(47)
(then I would get here the result.)
However I don't know, how to let the program count the number of inputs or how to let it declare and use variables.
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Sep 17, 2014
I want to declare integers, while the program is running.
I run the program and then I give it via System.in.println an integer and repeat this as long as I want. I want the program to give those integers a name of a certain type for, for example a(i) or a[i], dunno, (it should be handy) and then a(i) represents the the i'th integer I gave the program. My idea is then that I can use those elements by their name just like, if I had declared them in the first place. For example add two integers together. For example I defined a method add+, which waits for 2 integer and then adds them. For example I write:
add
a(2)
a(47)
(then I would get here the result.)
I don't think implementing the add function is difficult. However I don't know, how to let the program count the number of inputs or how to let it declare and use variables.
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Oct 26, 2014
From a given array of positive and negative numbers, I have to find the longest SUB-Array which represents a Zig-Zag sequence...
A Zig-Zag sequence means that one number is possitive, the next one negative, the next one possitive, and so on and so on...
Like this: -1, 4, -5, 6, -9, 2, -9 etc....
So that means, if the array looks like this:
1, 4, -2, -5, 6, -9, 1, -4, 9, -8, 7, 4, -3
the longest sub-array which fulfills the requirement is (the part in bold):
1, 4, -2, -5, 6, -9, 1, -4, 9, -8, 7, 4, -3
and I only need it's length, which in this case is: 8
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Jan 30, 2015
I'm trying to figure out how to print the Major Scale of any give note in music. It works as follows:
There are 12 notes and each note is assigned a number
C = 0, C# = 1, D = 2, D# = 3, E = 4, F = 5, F# = 6, G = 7, G# = 8, A = 9, Bb = 10, B = 11.
After picking a random note, say F, the idea is to add the following sequence to move through the scale:
0, +2, +2, +1, +2, +2, +2, +1.
So, with F being 5, we move through the scale as 5, 7, 9, 10, 0, 2, 4, 5.
The theory is unimportant but, as you can see, the sequence loops back on itself, rather than continue past 11. This is where I'm stuck, though. I'm not clear on how to loop my numbers around in code. I'll show my attempt here:
public static void main(String[] scale) {
majorScaleOf(0); //0 represents C!!
majorScaleOf(5); //5 represents F!!
majorScaleOf(10); //Bb = B flat!!
[Code] ....
For the sake of simplicity I haven't shown the entire script of 'if' statements, but you get the idea.
The print out reads as:
0, 2, 4 (For C)
5, 7, 9 (For F)
10 (For Bb)
The last line demonstrates the problem, as I need it read as 10, 0, 2.
I've tried different approaches, but wanted to convey the basic problem with this post.
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Feb 17, 2014
Whats the best way to implement an error catching sequence.I was developing a program to write to a . csv file. and this is one of the methods in it and how I thought Try/ Catch should be implemented. So I have three different possibilities. Another auxiliary class with some constants:
Java Code:
public class Constants {
/**
* Constant name of the file.
*/
public static final String fileName= "inventory.csv";
[code]....
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Feb 12, 2014
public class Fibonacci {
public static void main(String[] args) {
int[] numbers;
numbers = new int[20];
numbers[0] = 0;
numbers[1] = 1;
System.out.println("
[Code] ....
I wrote this program for my Java class to print out the first 20 numbers of the Fibonacci series. My assignment then tells me to Rewrite your program using dynamic array. I'm not sure how to do this.
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Apr 15, 2014
I am attempting a programming exercise to display the values in the Fibonacci sequence from F0 to F15. I understand the concept, but, for some reason my equation is simply creating a resulting string of numbers that simply increase by 2's. As, I know it is supposed to be the sum of the previous F and the F that precedes that one to total the new F number. It seems so simple yet I seem to be far off. As usual, I have worked my code for your review.
/*
* This program calculates the "Fibonacci sequence."
* A "sentinel" is used to limit the extent the calculation.
*/
import acm.program.*;
public class bookFibonacciTest2a extends ConsoleProgram {
/* Specifies the limit value of the calculations */
private static final int SENTINEL = 16;
public void run() {
println ("This program display Fibonacci sequence numbers 0 - 15.");
[Code] .....
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Oct 30, 2014
I have to find where in the fibonacci sequence a at number belongs, using a if or while loop.
Example
>55 is a Fibonacci number whose order in the sequence is 11
>35 is not a Fibonacci number. However, it lies between Fibonacci numbers 34 (order: 10) and 55 (order: 11)
import java.util.Scanner;
public class While {
public static void main(String[] args) {
System.out.println("Welcome to the Fibonacci Sequence Detector");
Scanner in = new Scanner(System.in);
[Code] .....
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Apr 1, 2014
So I have one set of If Else If statements. My program calculates just the first comboBox. It is retrieving all the values from the other comboBoxes but I do not understand where to place the other If statement structure so I can calculate the other values I have set for the other objects. I would not like to use a different class for each and I know I have my calculations done right below my current if statement. Could it be left there and where shall I place the other if statements so they get read by my arithmetic sequence?
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource() ;
int deckSiz = (int) Decks.getSelectedIndex() ;
int wheelSiz = (int)Wheels.getSelectedIndex();
[code]....
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Sep 3, 2014
Consider the sequence of digits from 1 through N (N<=9) in increasing order: 1 2 3 4 N
Insert either a +(for addition) or a - (for subtraction) between each of the digits so that the resultant sum is zero. Print all possible combinations that sum to zero.
Example: Enter a number: 7
1+2-3+4-5-6+7=0
1+2-3-4+5+6-7=0
1-2+3+4-5+6-7=0
1-2-3-4-5+6+7=0
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Apr 29, 2014
Write a recursive method that calculates the Nth number in the Fibonacci sequence. The first and second numbers in the sequence (the base cases) are both 1. After that, each subsequent number is the sum of the previous two. Stated a bit more formally:
fib(n)={1fib(n−1)+fib(n−2)n<2otherwise
For example, here is the first few numbers in the sequence:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
Your fib method should be part of a class named Fibonacci. In addition to the fib method, the Fibonacci class should have a main method that calls fib(9). If the result doesn't equal 34, you should print an error message. Otherwise, it should print out a message saying that it was successful.
After writing your Fibonacci class, answer the following question: How many times is the fibonacci method called when calculating the 5th number in the sequence?
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Oct 24, 2014
I am trying to find the longest descending sequence without arrays. So 65124976231 would output 9762.
import java.util.*;
public class HelloWorld {
public static void main(String[] args){
String num = "";
int longestLen = 0;
int currLen = 0;
String max = "";
[Code]...
I keep getting: The longest descending sequence is: 6512 In an infinite loop.
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Oct 30, 2014
I have to find where in the fibonacci sequence a at number belongs, using a while loop.
Example
>55 is a Fibonacci number whose order in the sequence is 11
>35 is not a Fibonacci number. However, it lies between Fibonacci numbers 34 (order: 10) and 55 (order: 11)
import java.util.Scanner;
public class While
{
public static void main(String[] args)
{
System.out.println("Welcome to the Fibonacci Sequence Detector");
[Code] ....
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Jan 1, 2015
I have to submit my system for a hospital management system(java) and i have been asked to draw the following diagrams
Architecture Diagram
Context Diagram
Sequence Diagram
How to draw ???
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Mar 12, 2014
Modify the Improved Fibonacci application to store its sequence in an array. Do this by creating a new class to hold both the value and a boolean value that says whether the value is even, and then having an array of object references to objects of that class.
Did I just need to declaring the variable in other class (for boolean value and the value itself) or else ?
Here is the code for ImprovedFibonacci.java
Java Code:
class ImprovedFibonacci {
static final int MAX_INDEX = 9;
/**
* Print out the first few Fibonacci numbers,
* marking evens with a '*'
*/
public static void main(String[] args) {
int lo = 1;
int hi = 1;
String mark;
[Code] ....
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May 14, 2015
I am not sure what is wrong with my code? The code produces a negative number when I type in 4000000 into the fib method parameter.
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
Java Code:
public static void fib(int k) {
int result = 0;
int[] array = new int[k];
array[0] = 1;
array[1] = 2;
for (int i = 2; i < k; i++) {
[Code] ....
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Feb 10, 2014
Need to develop a Java application to listen to all user events occurring in the (initially only Windows) operating system to record some kind of record and to reproduce the sequence of events below ...
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Jul 6, 2015
I'm trying to open URL's that the WebView considers Popups (it triggers the PopupHandler installed through onCreatePopupHandler) in an external In the PopupHandler I return a Webengine on which I installed a StateChanged listene and when the State changes to SCHEDULED I run some code top get the location of the WebEngine and open that URL in an external browser and then cancel the loading of the URL by canceling the LoadWorker using the LoadWorker.cancel() method wrapped in a Platform.runLater(..) call (in order to not crash the JVM).
However, then the PopupHandler is invoked because a window.open(url) was called in JavaScript in the main WebEngine, something odd happens: while the canceling of the loadworker was successful (it returns true and the LoadWorker goes to state CANCELLED), all of a sudden the state goes back to scheduled and my StateListener is called again with a newState of SCHEDULED, to if I don't work around it, the URL is opened again in the external browser. I can work around this by keeping track if the URL was already opened in the external browser once, but from what I can tell, this is just a bug.
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Mar 15, 2014
Suppose that a certain BST has keys that are integers between 1 and 10, and we search for 5. Which sequence below cannot be the sequence of keys examined?
(a) 10,9,8,7,6,5
(b) 4,10, 8, 6, 5
(c)1,10,2,9,3,8,4,7,6,5
(d) 2,7,3,8,4,5
(e)1,2,10,4,8,5
I've noticed many differences, such as there is only one with an odd number of keys, and one has all integers from 1-10 inside of it, but I can't find any real reason that you wouldn't be able to search it?
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