Using Java Arraylist With Menu Method
Apr 12, 2015
2 problems with this code:
How do I code this so that after the user has added to the arraylist 'theFruit' if they then press 'V' to view all fruit it includes the default fruit as well as the fruit they've added?
Also in the method 'AddFruit' it only allows me to add 2 fruit before printing. Why is this?
import java.util.ArrayList;
import java.util.Scanner;
public class StkOv {
public static void main(String[] args) {
TheMenu();
[Code] ....
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Aug 14, 2014
I want to read json file as follow;
{
"M": {
"row": [
{
"col1": "c00"
},
{
"col1": "c10",
"col2": "c11"
},
{
"col1": "c20",
"col2": "c21",
"col3": "c22"
}
]
}
}
Next to reading I need to assign to two dimensional array, but without giving "col1","col2","col3" a lot.
The array is for example, Array[3][] = {{"c00"},{"c10","c11"},{"c20","c21","c22"}};
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Jun 26, 2014
So i have a problem i want to make a menu that allows you to press 1 and then make lets say a Car,
The code would look like
Car car = new Car();
And then add to my list
cars.add(car);
If in my menu the person presses 1 again, will they add another car or will it override it
Also: how can i make a menu that doesnt allow you to press option 5 (something that requires you something that should be registered in other options ), until you registered them?
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Sep 5, 2014
Having trouble figuring out the code in order to find the price column for all items in a ArrayList. So far i have:
private double calculateSubtotal() {
try {
myConnection = DriverManager.getConnection(DATABASE_URL);
myStatement = myConnection.createStatement();
myResultSet = myStatement.executeQuery("SELECT price FROM menu");
[Code] ....
I am not sure if i am going about this the right way or not?
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Mar 18, 2014
How do I code this without having the need to use iterator? Code a Java method that accepts an ArrayList of integers and an integer. The method should delete all elements in the array list exactly divisible by the integer and return the number of remaining elements.
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Dec 7, 2014
Main screen leftsecond screen rightswing portal application is visible on two screens. If you open a context menu (right mouse) on the right screen, the context menu open on the left (Main) screen instead of the right.
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Nov 7, 2014
i would like to create a menu like below where if i clicked on "DRAW", a frame to draw will appear and when i clicked on animate, I can animate an object drawn. I tried on using JButton, but I donno how to customize the design n so I would like to know is there other ways so tat my menu will appear as below?
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Jan 28, 2015
Okay so here are the requirements.
Java Code:
/**
*The method creates an array list of integers and then prompts the user
* for an integer. As long as the user continues to enter anything other
* than -999, add the number to the array list.
*
* @return the array list of numbers
*/ mh_sh_highlight_all('java');
I've attempted this several times but am still struggling.
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Jan 21, 2015
I'm writing a program that acts as a 'pocket' where the user is able to enter a kind of coin, such as, a quarter and the amount of quarters it has. I was assigned to do 3 different class, the Coin Class in which the coins and their values can be instatiated from, a Pocket Class, where I have to write a method that can add the coins of the user (basically the method would act like ArrayList .add() ) and the PocketClass tester. I have already written most of the code, but I am stuck as to how I could write the following method:
Java Code:
public void addCoin(String s, int i) {
// s is type of coin, you are using s to instantiate a Coin and get value
// i is number of coins, you are using i to keep adding value to the totalValuefor
} mh_sh_highlight_all('java');
Would I use a for-loop in order to keep track of the number of coins? I would use ArrayList but the assignment calls for creating a method similar to that of .add()
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Oct 11, 2014
my arraylist is declared in my main method. A string that i will be calling on is declared in my main method as well. The arraylist and string is passed to a method outside the main. I am to search for the beginning of a string and end of the string, remove those items. Then i am to pass the string with the removed items to arraylist that is called in my main with an enhanced for loop. The for loop then displays what is needed from the string and the method i created. I will posting an example of my main and method that is used in my program.
public class ExampleUrl {
public static void main(String[] args) throws MalformedURLException, IOException {
ArrayList<String> urlList = new ArrayList();
String url = "";
[Code].....
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Feb 24, 2015
how to read and understand the API's. I've got an array list and I was wondering if there was a method that can randomly re arrange the elements in terms of their index positions.
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Jan 14, 2014
I have created a method Rectangle and added a loop in my class Resizer (MouseAdapter) but impossible to resize the rectangles of the arraylist independantly !
class Rectangle extends Rectangle2D.Float{
private String name;
public Rectangle(float x, float y, float width, float height, String name) {
setRect(x, y, width, height);
this.name = name;
[Code] .....
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Mar 30, 2014
This is the code fragment I have for searching my ArrayList. Now, each contact is stored in the ArrayList with five elements (first name, last name, etc.) and they're Strings. The error I get when I try to compile my program lies within this code fragment. It says it cannot find the symbol for the search method. I'm not quite sure what to do with this error.
int foundIndex = SAAddressBook.search(aBook);
System.out.println();
if (foundIndex > -1)
aBook.get(foundIndex).displayContact();
else {
System.out.println("No Entry Found");
}
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Sep 1, 2014
I am trying to remove the duplicate elements from ArrayList using .contains() if elements are primitive datatype it works but user-defined datatype does not work.
public class UserBean {
String name;
String address;
public String getName() {
return name;
[code]....
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Sep 14, 2014
So I'm trying to implement a quick sort method for an ArrayList of Strings and right now I'm getting the compiler error message: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space. I don't know what that error means nor how to fix it. I've marked in my code where the error seems to be occurring.
import java.util.ArrayList;
public class quickSort
{
// constructor
public quickSort()
[code]....
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May 11, 2012
I'm doubted regarding the implementation of Collections.binarySearch() method on an ArrayList of objects of a custom class Movie.
Here is the movie class :
public class Movie implements Comparable<Movie> {
String movieName;
String rating;
String director;
String theme;
[Code] .....
The sort/binarySearch in searchByMovieName function is done with natural sorting (and Comparable Interface in Movie class). I mean no comparators involved here. And the comparator that I used for sorting/binarySearching on Movies Director attribute in searchByMovieDirector function is :
public class MovieDirectorComparator implements Comparator<Movie> {
public int compare(Movie movie1, Movie movie2) {
return movie1.getDirector().compareToIgnoreCase(movie2.getDirector());
}
}
But I was not able to implement binarySearch ?? How to implement the binarySearch here. I have google to see only binarySearch working on Arrays or probably ArrayList of String only, but not on ArrayList of custom objects.
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Aug 10, 2014
So I have been busy at some projects lately. One of them having this projectill put up the full code and the part i have problems with:
package relax;
//importeverything
import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
[code]....
There is some kind of issue here.in the gui it will ask you to give points in time (ms) it wants to click for you, although when for example i put in 3 at "How Much Clicks" it asks 4 times and then exits with an error.Here is the error:
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3
at relax.Relax.StartSetup(Relax.java:175)
at relax.Relax$2.actionPerformed(Relax.java:78)
at javax.swing.AbstractButton.fireActionPerformed(Unk nown Source)
at javax.swing.AbstractButton$Handler.actionPerformed (Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed (Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
[code]....
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Jun 26, 2014
I am looking at a snippet of code in my "learning Java 4th edition" by Orielly and there is a small snipped of code which says:
Java Code: Date date = new Date();
List list = new ArrayList();
list.add( date );
..
Date firstElement = (Date)list.get(0); // Is the cast correct? Maybe. mh_sh_highlight_all('java'); so I am typing the same thing in my compiler in a small Driver class and for some reason I have an error and Im dumbfounded...
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Aug 27, 2014
i am interested to add integer objects and String objects into any collection object ..... while iterating the collection object i am not interested to do any type cast in java
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Apr 13, 2015
With my code the menu runs. But when the user has typed in the name of a fruit (to reserve it) I'd like it to say 'Reserved' when the user then presses 'V' (to go and view all fruit)I have read Oracle Java Collections Arraylist and from my understanding I either have to code using the get method or equals method but I'm not too sure how to (I did try though)
import java.util.ArrayList;
import java.util.Scanner;
public class FruitApril {
public static void main(String[] args) {
[code]...
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Jan 24, 2014
I just started playing around with Java for awhile, but got caught up in a problem when using ArrayList.
CinemaAppMain
public class CinemaAppMain {
public static void main(String[] args) {
new CinemaApp().start();
[Code]....
I am trying to get the movie name and theatre title from their ArrayList, and I know I need to go through the movie list & theatre list to find their name & title, and compare it with the user input and print out the result.
I use for(int i=0;i<movies.size();i++) to go through the the movie list, and I tried using for(int i=0;i<theatres.size();i++) to go through the theatre list. But when I printing multiple time with different user input value, it will show me strange result (screening have same movie name & theatre name, the else if statement is printed below the user input, user input is printed more than once after the first time).
Edit: I know its wrong for me to use nested for loop,if not, another solution is needed to get the item inside both of the list. (getting the "title" from movie list & "name" from theatre list)
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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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Apr 23, 2015
I am advised to use a while loop the Scanner method hasNextLine() and in the while loop body, call the Scanner method nextLine(), and add the returned String to the ArrayList of Strings. what I have gotten so far:
Scanner input = new Scanner(new File(""));
while(input.hasNextLine()) {
String line = input.nextLine();
System.out.println(line);
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Aug 25, 2014
I would like to create an ArrayList from data types stored in a text file.The ArrayList would be multidimensional with two data types; int, String.
Example text file could be:
4 cahiers grand format
3 stylots bic bleu
5 gommes
I find it very difficult for multiple data types i don't see how its possible.
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Oct 26, 2014
I'm new to the concept of ArrayList and I want to solve this problem in my code.
My main problem: I don't know how to sort itemA and itemB to appear only once then It will just add the total prices together.
This is the behavior of my code:
C:Documents and SettingsDrewDesktop>java ReceiptCode
Enter Company Name
ABC Co
Enter STREET ADDRESS
123 Main Street
Enter CITY, STATE, ZIP
[Code] ....
I don't know how to sort itemA and itemB to appear only once then It will just add the total prices together. Here is my sourcecode:
ReceiptCode.java
import java.util.Scanner;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
[Code] ....
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May 12, 2014
I'm trying to create a GUI java application.
I want a menu with buttons that looks like this:
Button 1: Start
Button 2: Help
Button 3: About Me
If you press one of the buttons you will get to another frame with new buttons, new labels and so on.
Next step for instance if you press button 1, I'd like my program to get this frame:
Different alternatives, and a text field with a button. One commando leads to one new JFrame with new buttons, text fields and so on.
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