How To Sequence Through Components
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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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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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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Jan 1, 2014
I decide to make a new GUI just for fun and practise and i want to learn more about Layouts.. right know i am try to understand some staff about GridBagLayout.
I want to make a GUI with this Layout :
So..first i am a frame with borderlayout then i put a JMenuBar and bla bla bla and i create panel with GridLayout which i put on myFrame.add(panel1,BorderLayout.WEST) and also i make an another JPanel which i put of the Center of main Frame (myFrame.add(panel2,BorderLayout.Center))
when i run the program i get this GUI :
Now the problem is that i can't put the JButton on the top of the gridLayout just to look like the first picture.. i Read about anchor and i try to
gbc.anchor = GridBagConstraints.NORTH; but without results.. still the components are on the middle of the JPanel..
Here is my Code () :
Java Code:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
[Code] .....
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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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Jul 25, 2014
Really need some simple and complete example on how to extends components (graphically and functionally) for primefaces 5.
For example I can't figure how to add custom attributes to existing component or define default values for existing attributes.
Is there any tutorial or a basic common way to achieve this goal or each component have to be extended in its way?
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Jun 8, 2014
In some examples I see jsf components inside the tag view, other times dont.
- Is it important to put all jsf components inside "the view" tag?
- What would be the difference not putting them inside this tag?
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Jul 14, 2014
I want to make a simple Table Tennis game. I have 2 drawing classes. 1st should draw oval and 2nd rectangle. But second class, which should draw rectangle doesn't work and if i use it together with oval class, then oval doesn't appear too.
Java Code:
public static void main(String[] args) throws InterruptedException
{
Intro i = new Intro();
Pall pall = new Pall();
Laud laud = new Laud();
i.frameID().add(pall); // this adds oval
i.frameID().add(laud); // this adds rectangle
i.frameID().pack();
i.frameID().setSize(400, 400);
[code]...
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Jan 7, 2014
Currently I get errors when trying to exit my JFrame without playing the youtube video I have set it to load.
My Code:
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
import chrriis.dj.nativeswing.swtimpl.NativeInterface;
[Code] ....
If it's relevant the error:
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
[Code] .....
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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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