Program Like Applet - Creating Multithreading Or Drawing Objects

Aug 20, 2014

What is the best choice to program like an applet i mean easy with creating multithreading or drawing objects etc.

View Replies


ADVERTISEMENT

Drawing Multiple Objects Swing

Jun 30, 2014

I have to do an assigment using Swing, where I have to make a Board(extends JPanel) and add multiple instances of moving elements to it, with following requirements:

By adding a new object to the Board, the others must not slow down. Also the user interface must not be blocked by the moving objects. So, the movement of the objects must be handled in a separate thread.

and

The application must support adding lots of objects, so it is not okay if every object has its own thread, as this would take too many resources. Design the application in such a way that it uses a constant number of threads, meaning that the number of threads does not grow when adding more objects.

The question is:

How to do this thing with constant number of threads?

View Replies View Related

Reading Point Objects From DRW File And Drawing Lines On Panel

Sep 15, 2014

I am trying to read Point objects from square.drw file which contains endpoints of line segments, and draw lines making a square on panel when I run the program. This is what I have got so far. How to get the points using array for drawing ?
 
// Initializing fields
private Point[] endPoints ;
FileInputStream fos;
ObjectInputStream oos;
int sampleSize = 0;
 
[Code] ....

View Replies View Related

Swing/AWT/SWT :: Reading Point Objects From DRW File And Drawing Lines On Panel

Sep 15, 2014

I am trying to read Point objects from .drw file which contains endpoints of line segments, and draw lines making a square on panel when I run the program. This is what I have got so far. how to get the points using array for drawing ?

// inside the method to read points objects from .drw file
try {
fos = new FileInputStream("square.drw");
oos = new ObjectInputStream(fos);
// creating an object of Point class
endPoints = new Point[sampleSize];

[code]...

View Replies View Related

Creating A Cube Applet - How To Loop DrawLine

Mar 16, 2014

import java.awt.*;
 public class Exercise5 {
public void paint(Graphics g) {
g.drawRect(30, 50, 50, 50);
g.drawLine(30,50,40,40);
g.drawLine(80,50,90,40);
g.drawLine(40,40,90,40);
g.drawLine(80,100,90,90);
g.drawLine(90,40,90,90);
}
public static void main(String args[]) {
}
}

I got how to create the cube, but how do i loop the drawline? I am supposed to only have one ?

View Replies View Related

Creating Applet With Dropdown Lists - Method Not Abstract

Oct 21, 2011

i am trying to create an applet with drop-down lists. When I compile the program the following error message appears '. . .is not abstract and doesn't override abstract method action Performed. . . Here is my code . . .

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class DavidApplet extends Applet implements ActionListener //class header {
Label fName=new Label("First Name");

[Code] .....

View Replies View Related

Creating Objects From Methods?

Mar 20, 2014

public class demo
{
Public class static void main(String[]args) {
//Creating a variable that will be a reference to the object
Peoples person_one;

[Code] ....

I have assembled this code below that has a void method which will creat a new object. Problem I encounter is that in

Create_object(person_one);

the person_one has an error saying not initialized. I'm jus trying to learn on my own ways here and practice so may know what's wrong with this? I know I can use a return object from methods but what about this approach?

View Replies View Related

Creating Complicated Objects

Dec 30, 2014

I'm trying to create complex Character objects. Each object has a name, and for each object with the same name, they share some of the same initial data. However, there are also some bits of data that are given to the object when it's created. For example, an "Elephant" always starts out having a weight of 500, but its position is determined when it's created. Any of these values may later be changed during runtime.

class CharacterStaticParameters {
int weight;
int numberOfFeet;
int numberOfEyes;

[code]....

For example, whether I should try to use words other than 'static' and 'dynamic', or a nicer word than 'parameters'?

View Replies View Related

Creating Objects From Class

Aug 17, 2014

So I'm still trying to get to grips with Java, and like to understand exactly why I'm doing something, so that I am not just regurgitating the code, If I want to create an object from class "Apples", I would use the following, right?

Apples MyAppleObject = new Apples();

From what I understand, MyAppleObject is the new object name, new -> creates a new instance of it in memory, and Apples() is the onCreate method that is called

So question 1: (just a quick aside question) Can I create an object without calling Apples()? i.e.

Apples MyAppleObject = new;

Question 2: - PARTLY SOLVED - I discovered that (Button) is a way of typecasting, so I understand that line a little better. What I don't understand is why we don't need to initialize the object with "new"

I've now looked at a bit of android development and xml and those declarations are all together different, and I'm not sure why. I haven't found a single explanation for the difference in format.

Java Code:

Button Add;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Add = (Button) findViewById(R.id.button1); mh_sh_highlight_all('java'); So the Button object is declared above the onCreate method, but initialized afterwards I guess....

But instead of using Button Add = new Button() they use Add = (Button) findViewById(R.id.button1);

Question 3:

then In XML they use the following:

Java Code:

public*static*void*main(String[] args){
*********
********// Creates a DOM object in memory. Now you can access
********// data in the xml file
*********
********Document xmlDoc = getDocument("./src/tvshows5.xml"); mh_sh_highlight_all('java');

Once again, why didn't they have to use : Document xmlDoc = new Document()

View Replies View Related

Creating New Objects Within Methods?

Sep 14, 2014

I want to make a program where users are prompted to enter a username and a password and have these two values create a new instance of the Object User. But I'm not sure where to start.

import java.util.Scanner; 
public class Main {
public static void main(String[] args) {
createUser();

[Code] ....

how to take username + password and put it into an object.

View Replies View Related

Why Isn't Constructor A Requirement For Creating Objects

Jun 13, 2014

Java Code:

class GenericQueue<E> {
private LinkedList<E> list = new LinkedList<E>();
public void push(E element) {
list.addFirst(element);
}
public E pull() {
return list.removeLast();

[code]...

Is a constructor required to create an object, if one of its instance or class variables haven't been instantiated? Like private String string;

View Replies View Related

Creating Array Of Objects In Constructor

Mar 16, 2014

I want to create a simple app that takes a name from the console then compares the name to a small phone book,when the name matches another name it will return the associated phone number.

I have a small contacts class which has name and number fields,Then I have a phone book class which populates an array with 4 contact objects that I can compare the entered number against.

here is my contacts class

public class Contact
{
String name;
int number;

[Code].....

In the main method I am just trying to print out one of the fields for one contact to see if I can actually access it to compare it to the name entered.Its saying "MaryJones" cannot be resolved to a type.I'm guessing I cant create all that code in the constructor?

View Replies View Related

JSF :: Creating Primefaces 4.0 Charts From Database Objects

Jul 27, 2014

I'm trying to create a simple bar chart from integer values (measuring number of bulldozers) stored in a mySql DB, in the following schema:

Integer rigId PK;
Integer rigQty;
Date recordDate;
String country FK;

I want to plot the date on the x-axis and quantity on y-axis. I can't seem to find any examples of how to render charts from a database. I just find the generic Primefaces 4.0 examples which uses static data like this:

private void createCategoryModel() { // category chart
categoryModel = new CartesianChartModel();
ChartSeries boys = new ChartSeries();
boys.setLabel("Boys");

[Code] ....

I'm really not sure how to adapt the above to a database method nor have any web searches produced useful examples. I tried something like this, but how to find examples or the type of methods I need to use to create a bar graph from Db values:

@ManagedBean(name = "chartb")
@SessionScoped
public class BarChartBean {
private final Map<Integer, Map<String, Number>> rigNums = new HashMap<>();
// private final Map<Integer, Map<String, Number>> HorasOrcadasPorFunci = new HashMap<>();
private CartesianChartModel cartesianChartModel;

[Code] ....

View Replies View Related

Importing And Creating Objects From The Text Files?

May 25, 2014

I've been trying to write a program for some time now, but im encountering problems while trying to complete it. The program has a student class and a course class (set up with some info about the class, like #, professor name, course title, course time). Now, i have a text file in the workspace, and i have to import the data from the textfile, and thats just what i did, but then there is an option which allows the user to delete a course only by inputing the course number, and when he does that, the program outputs the course's name, and confirms the deletion of the course (From the student's record, i created a vector for that and imported all the courses from the text file). But how can i let the program know what's the name of the course when the user inputs the course number ???

When the data is read from the file, objects should be created and added to the student's course record. <- i think here's where i messed up ? i imported the data, but how can i actually make them objects before adding them into the vector ?

PHP Code:

public static void main(String[] args) throws IOException
{
Scanner scan = new Scanner(System.in);
Vector Record = new Vector();
try {FileReader filereader = new FileReader("CLASSES.txt");
BufferedReader bufferedreader = new BufferedReader(filereader);
String test = "";
while(test != null)
{
Record.addElement(test);
test = bufferedreader.readLine();
} mh_sh_highlight_all('php');

View Replies View Related

Converting A Program Into Applet?

Sep 30, 2014

how to make an applet out of this program but can't seem to do it.

Java Code: import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JLabel;
import javax.swing.JFrame;
import java.io.*;
import java.util.Scanner;

[code]....

Technically, when you run the program, a gif page appears (that I put as a placeholder) and when you press the letter 'n' JCreator runs the program, displaying a character P on a .txt field made using the Notepad on Windows. You can move it left, right, down, and up andf it will move accordinly. However, each time I make such action, the compiler has to rewrite to whole .txt field with the new position.

My former tutor said that in order for it to be "real-time", we have to use an applet.

View Replies View Related

How To Run Applet Program In Web Browser

May 10, 2014

import java.applet.*;
import java.awt.*;
import java .awt.event.*;

[Code]....

View Replies View Related

Converting JFrame Program To Applet?

Jan 15, 2015

I have two programs written out which open up in a JFrame when run but now I need to make it an applet.

My sample code:

import java.applet.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

[Code] .......

View Replies View Related

Creating A Program That Will Compile And Run Another Java Program

Feb 20, 2014

I'm creating a program that will compile and run another java program:Lets say I have a program in directory

D:HelloWorldsrc
and compiled program will be in
D:HelloWorldin
inside src and bin is a folder hello (that's a package)

package hello;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World");
System.out.println("Hello World");
}
}

This program will be run by another program (that's the program that I am creating).Here is the code of my program:

package runnercompiler;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class RunnerCompiler {
 
[code]....

View Replies View Related

Dinner Menu Program - Some Text Is Not Showing On Applet

Dec 23, 2014

I have been writing the below Dinner Menu Applet; however some text is not showing on the applet and it is not adding the 'desserts" section correctly especially the one that says "rice Pudding". I've tried it in so many different ways and it's sill not working correctly.

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class DinnerMenuApplet extends Applet implements ItemListener
{
Label dinnerMenu = new Label("Dinner Menu");

[code]....

View Replies View Related

Java MultiThreading Stock

Feb 13, 2014

I am doing a multi threading program . I am unable to get the output i want. I have no compilation error . But I cant get the result I , Null exception. This is my Test program

import java.util.*;
public class Test
{
public static void main (String[]args){
int totalShares = 0 ;
double totalCost = 0.0;
String name = "FCS";
double profit = 0.0;

[code]....

View Replies View Related

Deadlock In Java Multithreading

Aug 24, 2014

This is my own coding for understanding deadlock in multithreading . But my doubt is whether this program mirrors the concept of deadlock perfectly or not. If not what should i do to make this code a perfect deadlock.

import java.io.*;

class A
{
B bc;
synchronized void funcA(B b)
{
bc=b;
System.out.println("INSIDE FIRST OBJECTS MONITOR");

[Code] ....

View Replies View Related

Difference Between Multithreading With / Without Executor Framework

Mar 16, 2015

Difference between multithreading with and without executor framework.

View Replies View Related

Traffic Light Simulation Using Multithreading

Feb 2, 2015

I am writing a simple program to simulate a traffic light. What I want is to make them glow after each 1 second, one by one. For example: Firstly Red, then after 10 seconds, red will be put to off and yellow will start glowing and then accordingly green. This process shall continue incessantly (Just for experimental purpose). I have some arrangement done but could not figure out how to put them together in run() method of Runnable interface. I know how interthread communication works. But could not find any logic in this case when three threads will run together.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TrafficLight extends JFrame implements Runnable
{
JButton red, green, yellow ;
TrafficLight()

[Code] .....

View Replies View Related

JavaFX 2.0 :: Multithreading In Background In Application

Dec 25, 2014

I need to work with multiple threads in background in a JavaFX application. I have a screen with ten buttons and I need to 'bind' each thread with the button that started the thread. If the user pressed a button that had started a thread (in the main screen, MainController.java), I need to recover it to display the information that contains to display it on the controls of Details Screen ( a second screen, DetailController.java).

What Class do you recommend for this? Service?

[URL] ....

It is possible to name the threads with any of these classes?

View Replies View Related

Fibonacci Series Using Java Multithreading

Feb 8, 2014

Program to generate Fibonacci series program using java multithreading.

View Replies View Related

Read Three Files Using MultiThreading And Write Into A New File

Apr 21, 2014

I got a question in my last interview, its all about multithreading, interviewer asked me to write a program, to write the contents of three files(F1,F2,F3) in to a new File F4, using multithreading , first thread should read the first file and second thread should read second file, so the File F4 should contain F1's contents in first then F2's contents after that etc. I tried to give my best shot, but i couldn't get a way to ensure that the first thread is reading the first file and write to F4 then second thread reading the second file and writing once first file is written completely into F4 and so on ..how to do this?

View Replies View Related







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