AWT vs swing ? what to use fo large dinamic tables?

Now this is my problem:
I want to make a table in wich I want to have values that may change verry rapidely so I want to repaint only the specific area or declare in a dynamic way some labels that I can change when I need them to. So how do I make this table without eating up the memory with all those repaintings?
I would apreciate if you could help.
Paul

I'm not a UI expert but I think if you use a TableModel you fire TableEvents to TableModelListners (i.e. the JTable) and the JTable updates the display based only on the rows that changed.

Similar Messages

Catching events on Desktop , without using any AWT or Swing components.

How can I catch events(for eg: mouse clicks) on the Desktop? I do not want to use any AWT or Swing components in my application.
Also, i want to get events even some other java/non-java application windows are visible on desktop, as long as my application is running.

Myrequirement is to capture all AWT events, regardless of on which component its being happened.
I mean I have to capture events outside the current running application (on desktop and any other java/no-java appliation windows also).
I couldn't find any other forum which discusses about event handling.
This is part of my app. other end extensively uses awt.

Lighter Java GUI than awt and swing?

I had recently came across a company website (http://www.bambookit.com) where they developed a java gui library without using awt and swing (seems to what they claim). And on top of that it uses xml to generate the gui components (they call widgets) and the whole library size is only 95kb and supports java 1.1.x and above. Their demos on the applets loads super fast, never know/experience that java applets can actually be this quick. But this confuses me, how is it possible to develop a gui alternative to awt with the basic java classes and no dependency on awt? But since the applets are awt based, it means that they must have some dependencies.
This is an extract from their website (that it seemed they did not use awt)
"Java has a fundamental flaw in its paint thread that made it very difficult to build extremely large applications without getting severe performance and resource penalties (This affects both AWT and Swing based applications). It�s main repaint queue\thread when assigning paint regions to various controls uses the Graphics objects to �clip� them. On a Sun Solaris machine this does not cause any problems, however on a windows machine each Graphics object consumes a system resource/handle, (a limit of around 16,000 exists on Win 95 and Win 98 machines). Each Bitmap image, each font object, each icon consumes a single system resource or handle. If a full repaint is performed on an application containing 1000 controls, it would consume at LEAST 1000 system resource handles. If the application was updated many times a second, lets say 10 times a second, then that equates to 10,000 handles a second. This is not taking into account labels within controls, the various fonts styles and sizes created, the various images that get loaded. This could easily exceed 20,000 system resource requests a second. Bambookit on the other hand utilizes the clip routines and passes along a SINGLE Graphics objects to all its various controls. This alone is a HUGE savings in system resources and performance."
Two questions came to my mind:
1) Is it possible to build applet gui without using awt and swing in java? If so the only way to do is to use JNI calls?
2) Am I wrong in interpreting www.bambookit.com's message that they are not using awt?
Any comments about this?
Regards,
Stanly

They use AWT as basis for their drawing-layer, as any other lightweight toolkits too.
If you just want a very fast & light alternative to swing/awt have a look at www.lwvcl.com !
I use it for a large applet-applikation that has to be java-1.1 compatible. It was a horor when using AWT which was implemented different over all JVMs available and very slow (although native widgets were used).
With lwvcl (which has only 150kB!) I can use state of the art applets that work very fast on modern jvms like 1.4, give me the ability to compile my applikation to native code using GCJ (using the swt-prt of the library) or distribute it to old-school 1.1 browser where it also runs quite fine...
Its free for GPL and very cheap for commercial use.
lg Clemens

AWT vs Swing vs Applet

Hi there,
I'm currently writing a chess game and I'm wondering which would be best to use - AWT, Swing or an applet. I read that using Swing in an applet is not advisable as the classes that would need to be downloaded could be quite large and so take quite a long time. I've been writing it using AWT as I feel that it is fairly simple to change it to Swing or to an applet. What are your opinions on this?
Many thanks!

I'm currently writing a chess game and I'm wondering
which would be best to use - AWT, Swing or an applet.Applets are not separate from AWT or Swing. The Applet class forms part of the AWT package, and JApplets are the Swing equivalent. If you were to use an Applet (or JApplet), you would still have to use AWT/Swing classes, such as Panel, Button etc. for the UI for your program, unless you want a mysterious magical grey box ;P
I read that using Swing in an applet is not advisable
as the classes that would need to be downloaded could
be quite large and so take quite a long time. I don't have a lot of experience using the AWT classes, and use the newer Swing ones. I have heard Swing is easier to use, but many browsers do NOT support Swing classes as standard (particularly Internet Explorer), and require the plug-in, which is a fairly hefty download, especially on a dial-up.
I've been writing it using AWT as I feel that it is fairly
simple to change it to Swing or to an applet. What are
your opinions on this?You say you are using AWT at the minute - are you writing the program as an application? If so, then I'm assuming you have the program running in a Frame, and to use the program as an applet, you would want to change your class from extending Frame to extending Applet. There shouldn't be a lot of change to code when adding components, but you will need to implement Applet methods (such as init()).
Just note that in order to use the program on a webpage, it must be an applet. If you want to use the program as an applet, seeing as you have already started by using AWT, you might as well stick with it as you would be putting in effort to convert it into Swing only to restrict the potential audience.
If you want the program to run as an application AND an applet, then the class extending Applet can have a main method, which creates a Frame, before adding a new instance of your applet and calling its init method.

AWT vs SWING and more

1)Though the components used in awt and swing are similar what is the need for two seperate packages ?
and
2)what is the main usage of "getContentPane()" ?
3)why do we use an appletviewer for executing applets provided the OS is Windows NT ..

1)Though the components used in awt and swing are
similar what is the need for two seperate packages ?AWT uses the native (heavyweight) components of the underlying Operating System. Actually a common (and small) subset of the provided components.
In Swing the components a lightweight, there's no native component behind them, the components are painted by pure java code (sometimes sophisticated components). The swing applications thus can look and feel the same on all platforms.
2)what is the main usage of "getContentPane()" ?When using swing you shouldn't add lightweight components to the window subclasses, only to the content pane.
3)why do we use an appletviewer for executing applets
provided the OS is Windows NT ..Did not understand.
Kurta

How can I create a my own dialog in awt or swings

How can I create a my own dialog in awt or swings instead of JDialog,Joption.
if possible some example.
Thanks in advance
bhaskar

hi,
just use the building blocks of of GUI components and their methods. For examlpe u want to write a Font Dialog box,
use Frame with lists , thers is classes by which u can pick the all fonts installes on ur system. Do appropriate programming to event handlers . On last in event handler of 'OK' button get the selected item from list and assign to wht u want thats all...........

Better method than using a large number of shift registers?

I'm trying to work with example code provided free by stanford research systems (http://www.srsys.com/downloads/soft.htm).
Their example software alows the user to run an analog scan across 100 masses (the x axis) which progressively produces a graph of all the data. It repeats scanning (and updating the graph)until the user hits stop.
My goal is to find a way to make the program display the graph of the last scan while it is displaying the current scan (this way it is possible to compare the graphs and see how they change). But as best I can tell the data is generated and plotted in a while loop piece by piece so the best thing my labview inept mind has managed so far is using a large nu
mber of shift registers and graphing the points as they generated along with points that were generated 10 cycles ago in a different color.
So I hope to either find a good way to use shift registers to get values from over 100 cycles ago (which doesn't really seem to work unless i just make space for over 100 little arrows in my loop) or to find a better approach to the whole mess.
The example does not seem to use XY plot and to tell the truth I don't know exactly what its using to plot.
Can anyone offer any guidance or at least understand my question enough to point me in the right direction.
I'm including the stock example and my adaptation to it but if you need to use the included sub vi's the package is on that SRS webpage I listed above (look under RGA).
I suppose this may all be too much to ask but I can dream can't I?
Attachments:
original.vi ‏87 KB
changed.vi ‏92 KB

I certainly agree that the DAQ programming is the part leaving me most confused. I'll attach the package that I am trying to modify, the trouble is there are so many sub vis involved in actually acquiring the data that I am not entirely sure what format the data comes out in.
Perhaps to someone more skilled than I am with lab view the inner workings of this package would be clearer. If you are up for it then look at SRSRGAa simple analog.vi in SRSRGA61.lib and you can see what I'm working with.
I'll also attach my attempt to modify the code to make it work like altenbachs example... however somehow it would seem my timing/synchronization is off. Hope some of this makes sense, I'll see what luck I can have with get w
aveform components, I suppose I have been approaching this so far as if my DAQ was just giving me data points as opposed to a waveform.
Attachments:
rga_lv_61.zip ‏2132 KB
graph_app.1.vi ‏101 KB

What is used by customers as client in 11g by default sql devloper/sql+ ?

What is used by customers as client in 11g to execute scripts.
command prompt based sql plus or sql devloper?
as the other Client sql*plus has been removed?
What is most preferred?

Black & white :-)You can use whatever colors you want. I have the window set up to occupy my entire 22" monitor and has a 5000 line scrollback buffer.
I was wondering what the customer by large would use to execute the sciptsThey would use SQL Plus.

Help Plz! AWT to Swing Conversion

Hey everyone, I'm new to java and trying to convert this AWT program to Swing, I got no errors, the menu shows but they dont work !! Could somebody please help me? thanks alot!
Current Under-Construction Code: (no errors)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class zipaint extends JFrame implements ActionListener,      ItemListener,
MouseListener, MouseMotionListener, WindowListener {
static final int WIDTH = 800;     // Sketch pad width
static final int HEIGHT = 600;     // Sketch pad height
int upperLeftX, upperLeftY;     // Rectangle upper left corner coords.
int width, height;          // Rectangle size
int x1, y1, x2, y2, x3, y3, x4, y4; // Point coords.
boolean fillFlag = false; //default filling option is empty
boolean eraseFlag = false; //default rubber is off
String drawColor = new String("black"); //default drawing colour is black
String drawShape = new String("brush"); //default drawing option is brush
Image background; //declear image for open option
private FileDialog selectFile = new FileDialog( this,
"Select background (.gif .jpg)",
FileDialog.LOAD );
// Help
String helpText = "Draw allows you to sketch different plane shapes over a " +
"predefined area.\n" + "A shape may be eother filled or in outline, " +
"and in one of eight different colours.\n\n" + "The position of the " +
"mouse on the screen is recorded in the bottom left-hand corner of the " +
"drawing area. The choice of colour and shape are disoplayed also in the " +
"left-habnd corner of the drawing area.\n\n" + "The size of a shape is " +
"determined by the mouse being dragged to the final position and " +
"released. The first click of the mouse will generate a reference dot on " +
"the screen. This dot will disapear after the mouse button is released.\n\n" +
"Both the square and the circle only use the distance measured along the " +
"horizontal axis when determining the size of a shape.\n\n" + "Upon " +
"selecting erase, press the mouse button, and move the mouse over the " +
"area to be erased. releasing the mouse button will deactivate erasure.\n\n" +
"To erase this text area choose clearpad from the TOOLS menu.\n\n";
// Components
JTextField color = new JTextField();
JTextField shape = new JTextField();
JTextField position = new JTextField();
CheckboxGroup fillOutline = new CheckboxGroup();
JTextArea info = new JTextArea(helpText,0,0/*,JTextArea.JSCROLLBARS_VERTICAL_ONLY*/);
JFrame about = new JFrame("About Zi Paint Shop");
// Menues
String[] fileNames = {"Open","Save","Save as","Exit"};
String[] colorNames = {"black","blue","cyan","gray","green","magenta","red","white","yellow"};
String[] shapeNames = {"brush","line","square","rectangle","circle","ellipse"};
String[] toolNames = {"erase","clearpad"};
String[] helpNames = {"Help","about"};
public zipaint(String heading) {
super(heading);
getContentPane().setBackground(Color.white);
getContentPane().setLayout(null);
/* Initialise components */
initialiseTextFields();
initializeMenuComponents();
initializeRadioButtons();
addWindowListener(this);
addMouseListener(this);
addMouseMotionListener(this);
/* Initialise Text Fields */
private void initialiseTextFields() {
// Add text field to show colour of figure
color.setLocation(5,490);
color.setSize(80,30);
color.setBackground(Color.white);
color.setText(drawColor);
getContentPane().add(color);
// Add text field to show shape of figure
shape.setLocation(5,525);
shape.setSize(80,30);
shape.setBackground(Color.white);
shape.setText(drawShape);
getContentPane().add(shape);
// Add text field to show position of mouse
position.setLocation(5,560);
position.setSize(80,30);
position.setBackground(Color.white);
getContentPane().add(position);
// Set up text field for help
info.setLocation(150,250);
info.setSize(500,100);
info.setBackground(Color.white);
info.setEditable(false);
private void initializeMenuComponents() {
// Create menu bar
JMenuBar bar = new JMenuBar();
// Add colurs menu
JMenu files = new JMenu("Files");
for(int index=0;index < fileNames.length;index++)
files.add(fileNames[index]);
bar.add(files);
files.addActionListener(this);
// Add colurs menu
JMenu colors = new JMenu("COLORS");
for(int index=0;index < colorNames.length;index++)
colors.add(colorNames[index]);
bar.add(colors);
colors.addActionListener(this);
// Add shapes menu
JMenu shapes = new JMenu("SHAPES");
for(int index=0;index < shapeNames.length;index++)
shapes.add(shapeNames[index]);
bar.add(shapes);
shapes.addActionListener(this);
// Add tools menu
JMenu tools = new JMenu("TOOLS");
for(int index=0;index < toolNames.length;index++)
tools.add(toolNames[index]);
bar.add(tools);
tools.addActionListener(this);
// Add help menu
JMenu help = new JMenu("HELP");
for(int index=0;index < helpNames.length;index++)
help.add(helpNames[index]);
bar.add(help);
help.addActionListener(this);
// Set up menu bar
setJMenuBar(bar);
/* Initilalise Radio Buttons */
private void initializeRadioButtons() {
// Define checkbox
Checkbox fill = new Checkbox("fill",fillOutline,false);
Checkbox outline = new Checkbox("outline",fillOutline,true);
// Fill buttom
fill.setLocation(5,455);
fill.setSize(80,30);
getContentPane().add(fill);
fill.addItemListener(this);
// Outline button
outline.setLocation(5,420);
outline.setSize(80,30);
getContentPane().add(outline);
outline.addItemListener(this);
/* Action performed. Detects which item has been selected from a menu */
public void actionPerformed(ActionEvent e) {
Graphics g = getGraphics();
String source = e.getActionCommand();
// Identify chosen colour if any
for (int index=0;index < colorNames.length;index++) {
if (source.equals(colorNames[index])) {
drawColor = colorNames[index];
color.setText(drawColor);
return;
// Identify chosen shape if any
for (int index=0;index < shapeNames.length;index++) {
if (source.equals(shapeNames[index])) {
drawShape = shapeNames[index];
shape.setText(drawShape);
return;
// Identify chosen tools if any
if (source.equals("erase")) {
eraseFlag= true;
return;
else {
if (source.equals("clearpad")) {
remove(info);
g.clearRect(0,0,800,600);
return;
if (source.equals("Open")) {
selectFile.setVisible( true );
if( selectFile.getFile() != null )
String fileLocation = selectFile.getDirectory() + selectFile.getFile();
background = Toolkit.getDefaultToolkit().getImage(fileLocation);
paint(getGraphics());
if (source.equals("Exit")) {
System.exit( 0 );
// Identify chosen help
if (source.equals("Help")) {
getContentPane().add(info);
return;
if (source.equals("about")) {
displayAboutWindow(about);
return;
public void paint(Graphics g)
super.paint(g);
if(background != null)
Graphics gc = getGraphics();
gc.drawImage( background, 0, 0, this.getWidth(), this.getHeight(), this);
/* Dispaly About Window: Shows iformation aboutb Draw programme in
separate window */
private void displayAboutWindow(JFrame about) {
about.setLocation(300,300);
about.setSize(350,160);
about.setBackground(Color.cyan);
about.setFont(new Font("Serif",Font.ITALIC,14));
about.setLayout(new FlowLayout(FlowLayout.LEFT));
about.add(new Label("Author: Zi Feng Yao"));
about.add(new Label("Title: Zi Paint Shop"));
about.add(new Label("Version: 1.0"));
about.setVisible(true);
about.addWindowListener(this);
// ----------------------- ITEM LISTENERS -------------------
/* Item state changed: detect radio button presses. */
public void itemStateChanged(ItemEvent event) {
if (event.getItem() == "fill") fillFlag=true;
else if (event.getItem() == "outline") fillFlag=false;
// ---------------------- MOUSE LISTENERS -------------------
/* Blank mouse listener methods */
public void mouseClicked(MouseEvent event) {}
public void mouseEntered(MouseEvent event) {}
public void mouseExited(MouseEvent event) {}
/* Mouse pressed: Get start coordinates */
public void mousePressed(MouseEvent event) {
// Cannot draw if erase flag switched on.
if (eraseFlag) return;
// Else set parameters to 0 and proceed
upperLeftX=0;
upperLeftY=0;
width=0;
height=0;
x1=event.getX();
y1=event.getY();
x3=event.getX();
y3=event.getY();
Graphics g = getGraphics();
displayMouseCoordinates(x1,y1);
public void mouseReleased(MouseEvent event) {
Graphics g = getGraphics();
// Get and display mouse coordinates
x2=event.getX();
y2=event.getY();
displayMouseCoordinates(x2,y2);
// If erase flag set to true reset to false
if (eraseFlag) {
eraseFlag = false;
return;
// Else draw shape
selectColor(g);
if (drawShape.equals("line")) g.drawLine(x1,y1,x2,y2);
else if (drawShape.equals("brush"));
else drawClosedShape(drawShape,g);
/* Display Mouse Coordinates */
private void displayMouseCoordinates(int x, int y) {
position.setText("[" + String.valueOf(x) + "," + String.valueOf(y) + "]");
/* Select colour */
private void selectColor(Graphics g) {
for (int index=0;index < colorNames.length;index++) {
if (drawColor.equals(colorNames[index])) {
switch(index) {
case 0: g.setColor(Color.black);break;
case 1: g.setColor(Color.blue);break;
case 2: g.setColor(Color.cyan);break;
case 3: g.setColor(Color.gray);break;
case 4: g.setColor(Color.green);break;
case 5: g.setColor(Color.magenta);break;
case 6: g.setColor(Color.red);break;
case 7: g.setColor(Color.white);break;
default: g.setColor(Color.yellow);
/* Draw closed shape */
private void drawClosedShape(String shape,Graphics g) {
// Calculate correct parameters for shape
upperLeftX = Math.min(x1,x2);
upperLeftY = Math.min(y1,y2);
width = Math.abs(x1-x2);
height = Math.abs(y1-y2);
// Draw appropriate shape
if (shape.equals("square")) {
if (fillFlag) g.fillRect(upperLeftX,upperLeftY,width,width);
else g.drawRect(upperLeftX,upperLeftY,width,width);
else {
if (shape.equals("rectangle")) {
if (fillFlag) g.fillRect(upperLeftX,upperLeftY,width,height);
else g.drawRect(upperLeftX,upperLeftY,width,height);
else {
if (shape.equals("circle")) {
if (fillFlag) g.fillOval(upperLeftX,upperLeftY,width,width);
else g.drawOval(upperLeftX,upperLeftY,width,width);
else {
if (fillFlag) g.fillOval(upperLeftX,upperLeftY,width,height);
else g.drawOval(upperLeftX,upperLeftY,width,height);
/* Mouse moved */
public void mouseMoved(MouseEvent event) {
displayMouseCoordinates(event.getX(),event.getY());
/* Mouse dragged */
public void mouseDragged(MouseEvent event) {
Graphics g = getGraphics();
x2=event.getX();
y2=event.getY();
x4=event.getX();
y4=event.getY();
displayMouseCoordinates(x1,y1);
if (eraseFlag) g.clearRect(x2,y2,10,10);
else {
selectColor(g);
if(drawShape.equals("brush")) g.drawLine(x3,y3,x4,y4);
x3 = x4;
y3 = y4;
// ---------------------- WINDOW LISTENERS -------------------
/* Blank methods for window listener */
public void windowClosed(WindowEvent event) {}
public void windowDeiconified(WindowEvent event) {}
public void windowIconified(WindowEvent event) {}
public void windowActivated(WindowEvent event) {}
public void windowDeactivated(WindowEvent event) {}
public void windowOpened(WindowEvent event) {}
/* Window Closing */
public void windowClosing(WindowEvent event) {
if (event.getWindow() == about) {
about.dispose();
return;
else System.exit(0);
Code End
Thanks again!
class ziapp {
/* Main method */
public static void main(String[] args) {
zipaint screen = new zipaint("Zi Paint Shop");
screen.setSize(zipaint.WIDTH,zipaint.HEIGHT);
screen.setVisible(true);

First of all use the [url http://forum.java.sun.com/features.jsp#Formatting]Formatting Tags when posting code to the forum. I'm sure you don't code with every line left justified so we don't want to read unformatted code either.
Hey everyone, I'm new to java and trying to convert this AWT program to SwingInstead of converting the whole program, start with something small, understand how it works and then convert a different part of the program. You can start by reading this section from the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/menu.html]How to Use Menus.
From a quick glance of your code it looks like you are not adding an ActionListener to your JMenuItems. You are adding them to the JMenu.
Other observations:
1) Don't mix AWT with Swing components. You are still using CheckBox
2) Don't override paint(). When using Swing you should override paintComponent();
3) Use LayoutManagers. Using a null layout does not allow for easy maintenance of the gui. Right now you are using 800 x 600 as your screen size. Most people are probably using at least 1024 x 768 screen sizes. When using LayoutManagers you would suggest component sizes by using setPreferredSize(), not setSize().

Learn AWT before Swing?

I have zero practical knowledge of Java GUI programming.
Swing sits on top of AWT. Swing is easier than AWT. Yet, so as to understand Swing, and to be able to do things Swing might not be able to do, I am inclined to first only use AWT. Build a base on which to learn Swing.
A counter argument would be, in my opinion, C vs. C++. While C++ sits on top of C, I don't see any benefit to learning pure C before C++. Further, I don't want things to be too difficult before making them easier regarding GUIs.
Should the progression be: AWT then Swing? Swing then AWT then Swing? just Swing, and learn AWT if ever needed?

I agree with the others, just learn swing and the parts of awt you need will just come along.
But I want to add that using a GUI generator to create swing for you is very tempting, especially at first, but is the worst thing you can do to handicap yourself. I know you didn't mention them, so this is sort of comming from left field, but just saying avoid them until you really know swing.
Also, how can you not see a benefit in learning C before C++? True C++ (even if not always practiced) is object oriented whereas true C is procedural. While OO programming is generally better, it is beneficial to understand procedural programming as well, and knowing both will only make you better as a programmer. But even more important is by never learning true C one never has a chance to learn just how powerful pointers are. Pointers are difficult to get your head around, but they are extreemly usefull, if you are one of the few rare people who can use them correctly and unlock their true power.
Just Saying.
JSG

Difference between awt ang Swing Interview Question n other Question

hi every one i use to think that i know java atlest so much that i can crack a lolcal comp interview but ........................
i ansered few Question but was speachlees when was asked few of this i do not remember all of them
1] difference between awt and swing.
2]System.out.println();
System is a class out is a variable so who come a variable calling a method.
3]are constractor inherateed in java.

1] difference between awt and swing.AWT is based on an abstraction of platform-specific, heavy-weight components. Swing is written entirely in java.
>
2]System.out.println();
System is a class out is a variable so who come a
variable calling a method.Do you mean how come?
In that case, the answer is simple: Because out is a variable, it can be redirected/compared against, etc much easier
3]are constractor inherateed in java.Kind of a trick question, as the answer is yes and no. Constructors are not inherited, but every constructor in the subclass must call one and exactly one constructor of the superclass

Database Connection to AWT and Swings

How do we provide database connection to AWT and swing components?
Is their any possibility to create database connection?
Thanks in advance

Just create an independent DAO class which does all the database/JDBC tasks.
Then use this DAO class as you use every other class in your AWT/Swing application.

What to use when making a game?

Hi,
I'm new to JAVA gaming but I was looking to making a bomberman like game in JAVA. I've been searching the web for ways to start programming this game, but there are so many different ways that I'm confused, what to use.
I want to create a client/server system with simpel 2D graphics.
Should I use sockets or TCP or UDP, or something else for the networking? And does anybody have any idea how fast it can be?
Furthermore what shoudl I use for the graphics. Just basic JAVA or JAVA 2D or something else? Is there a way to use hardware? Does using JAVA 2D mean the users needs to download this before he/she can play?
Is Webstart any good, so users can instanly download everyhting the game needs?
Maybe you guys can point me to some helpfull information on the net?
Or maybe some examples to start with.
Hope you can help and thanks in advance?

I am not an expert at Networking, never tried it
really, just read a lot of books about it; and
apparently you need UDP as the protocol checks whether
the packet has arrived or not.Erm, no - UDP is fast because it doesn't check. TCP is slow(er) but consistent.
As for speed, in 1.4.1 its GOOD. For an applet
ofcourse (don't know about applications). However, you
do need a decient hardware to run.Did you mean that the other way round? Apps are pretty much always faster than applets.
To the point - look at the java AWT / java2d tutorials, and use google

Customer relations are not what they used to be - armed guard at AT&T corporate store with a gun

One of our phones broke down and we quickly needed to put an older phone back in service, so we headed out to the corporately owned AT&T store to get the larger SIM we needed to use the old phone. We got there 10 min before closing time. The greeter at the door, I think was the store manager, who took our names and our number and warned us that there were 5 people in front of us, "so we may not get to you today." I explained we had traveled 30 min to get to this store and that we only needed a SIM card, and as a robot he repeated "like I said, we may not get to you today". I remember him because he has been with AT&T and on previous ocassions he was friendly and pro-active. We walked around a bit to look at the new phones, and sat down to watch people. We were now almost 15 min past closing time, and of the 5 associates we had seen when we walked in, only 2 were servicing customers. Strange! Just before 8:30 PM we were the last ones helped, due to only needing the SIM card we were done within in minutes. I explained I had been in retail sales and told him I understood that after a long day you want to go home on time, so I thanked him for sticking with it. We were walked to the door by the security guard, and I noticed she was carrying a gun. What the is a security guard in a phone store doing with a gun? On second thought, customers service is not what it used to be, and we pay on time. Judging by the horror stories on here, I can see that some would get upset. Strange.

csp256 wrote:
Garage Band free guitar lessons will not complete download without explanation. I was under the impression the basic lessons were included with the OS. In this case my troubles started after up grading to Yosemite 10.10.2--at the Raleigh, North Carolina Apple Store. I was told it was band width issue because there were so many people in the store.
Possibly, the bandwidth issue is referring to the global masses trying to download updates and purchases off their servers, and the servers are just too bogged down? In the olden days, huge MBytes of software were distributed on CD's, followed years later with GBytes on DVD's. Now Apple is trying to distribute GBytes to individuals repeatedly, over the internet, and the big multibillion-dollar company is unquestionably stumbling at it, because there are evidently some software glitches in the process.
"This is very frustrating because I can't get anyone from Apple to talk to me."
I hope it gets better.
Have you ever tried to call a specific store?
I've gotten just a recording in the past. Unfortunately, the nearest Apple store is well over a 1.5 drive for me.
My story on an iPhone 4S upgrade to iOS8 is somewhat incredulous; all of a sudden the phone crashes (which it never did before the upgrade). The Apple Tech said their diagnostics indicate the battery needs replaced. But this is probably off-topic.

What is use of index by binaary_integer

Hi All,
I have created to program of collection where we use index by binaary_integer in one program and not use index by binaary_integer in second program, but result is same, any body help me what is use of index by binaary_integer here
1- Declare
Type emp_table_type is table of
emp%rowtype index by binary_integer;
my_emp_table emp_table_type;
Begin
select * bulk collect into my_emp_table from emp;
for i in my_emp_table.first..my_emp_table.last
loop
dbms_output.put_line(my_emp_table(i).ename);
end loop;
end;
2- Declare
Type emp_table_type is table of
emp%rowtype;
my_emp_table emp_table_type;
Begin
select * bulk collect into my_emp_table from emp;
for i in my_emp_table.first..my_emp_table.last
loop
dbms_output.put_line(my_emp_table(i).ename);
end loop;
end;
your suggestion would be greatly appreciated.

here is one for you.
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17126/composites.htm#CHDEIDIC

AWT vs swing ? what to use fo large dinamic tables?

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