Java

code to develop main window in auto mobile spare parts

8-Dec-13 22:32

ابو عبدالله wrote:
How can i retrieve data from MySQL database

Read all records and build a collection of the points as you read them; as I suggested in my previous answer[^].

Veni, vidi, abiit domum

java string

Trupti0017-Dec-13 1:32

Trupti001

7-Dec-13 1:32

can I convert a string token into a char array or string array

Re: java string

jschell7-Dec-13 10:49

jschell

7-Dec-13 10:49

At best the question is not precise.

A "string token" doesn't mean anything in terms of the java language.

Now you might write a program that uses a "string token" but in general computer science jargon a "token" is a small non-dividable entity. There would be no point in converting it to a char array and even less point of creating a string array from it. And at best the latter would be nothing more than taking each character and making it into a string.

But then you might mean something different for "string token". If so you need to explain what you actually meant.

Re: java string

Peter_in_27807-Dec-13 22:44

Peter_in_2780

7-Dec-13 22:44

Have a look at String.toCharArray() ? See here[^]

Cheers,
Peter

Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

Member 104492436-Dec-13 0:49

Member 10449243

6-Dec-13 0:49

so please tell me about that source code about that main window in auto mobile spare part in java project

Re: code to develop main window in auto mobile spare parts

Richard MacCutchan6-Dec-13 2:12

Re: code to develop main window in auto mobile spare parts

6-Dec-13 2:12

Read the forum guidelines again, and try a more specific question. If you want source code then you need to search with Google, Bing etc.

Veni, vidi, abiit domum

jschell6-Dec-13 12:14

jschell

6-Dec-13 12:14

Member 10449243 wrote:
so please tell me about that source code about that main window in auto mobile spare part in java project

You do this in the following order
1 - Gather requirements, figure out what the 'main' window does.
2 - Learn basic java programming
3 - In general learn about web/internet server functionality how it works (presumably that is the goal)
4 - Learn the basics of implementing a web application in java
5 - Probably will need to learn about databases and how to access them in java
6 - Starting with 1, use what you learned in 2-5 to implement a java solution.
7 - Test it until there are no more bugs (or ones you can live with.)

career after bcs

Member 104492436-Dec-13 0:48

Member 10449243

6-Dec-13 0:48

tell me any advice about the mcs studies and how i can make my self good in developing

Re: career after bcs

Richard MacCutchan6-Dec-13 2:11

6-Dec-13 2:11

See http://www.codeproject.com/Messages/3137511/Forum-Guidelines-PLEASE-READ.aspx[^], this is a technical forum, we cannot advise you on career choices. If you wish to become a good developer then you need to study hard, and practice, practice, practice.

Veni, vidi, abiit domum

JFrame showing nothing.

chdboy4-Dec-13 23:24

chdboy

4-Dec-13 23:24

I'm not able to see content on JFrame ,when JFrame shows up.

Java

import java.awt.*;

import javax.swing.*;
import java.awt.event.*;
public class GraphicUse extends JPanel
{
public void PaintComponent(Graphics gr)
{	
	super.paintComponents(gr);
	this.setBackground(Color.BLUE);
	gr.setColor(Color.WHITE);
	gr.fillRect(50, 50, 100, 100);
	gr.setColor(new Color(139,38,190));
	gr.fillRect(50, 70, 100, 100);
	gr.setColor(Color.RED);
	gr.drawString("This is a new String", 50, 90);	
}
	
	public static void main(String[] args) 
	{
	}

}

And displaying it in another class which extends Frame

Java

JFrame newframe = new JFrame("Color Frame");
	         newframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         
	         GraphicUse gu = new GraphicUse();	         
	         newframe.add(gu);
	         newframe.setSize(250,300);
	         newframe.setVisible(true);

Richard MacCutchan4-Dec-13 23:42

4-Dec-13 23:42

Why does your main method not do anything?

Veni, vidi, abiit domum

chdboy5-Dec-13 0:06

chdboy

5-Dec-13 0:06

I'm calling this class from another class so it is using that main class main method.

modified 5-Dec-13 6:26am.

Richard MacCutchan5-Dec-13 0:47

5-Dec-13 0:47

Well you need to provide some more detail about your problem.

Veni, vidi, abiit domum

chdboy5-Dec-13 0:53

chdboy

5-Dec-13 0:53

what other details you need?

Richard MacCutchan5-Dec-13 0:56

5-Dec-13 0:56

No idea; but you need to provide enough to help people to understand the problem. Remember, we have never seen your code before so we cannot guess what each part is supposed to do or how it fits together. Having a blank main method in the code you showed above just serves to confuse.

Veni, vidi, abiit domum

suvi from mumbai10-Dec-13 1:18

suvi from mumbai

10-Dec-13 1:18

Your frame is covered by a gray frame thats why paint method do not show anything.

Variable not updated

Kujtim Hyseni3-Dec-13 8:19

3-Dec-13 8:19

Hello,

I have a code which checks some variable which has to be changed from false to true in other class, but, even if it changes it does not appears.
More details, I have the code:

Java

ms.isDataReady = false;
...
while(!ms.isDataReady);

the loop while waits forever in my main method even if

Java

ms.isDataReady

becomes true in

Java

ms

's appropriate method.

What I should do?

Richard MacCutchan3-Dec-13 8:49

3-Dec-13 8:49

How can it change to true if the loop is running?

Veni, vidi, abiit domum

Kujtim Hyseni3-Dec-13 8:59

3-Dec-13 8:59

It changes somewhere else but it doesn't affects the change in while in other words it doesn't appears changed, unless I use a tricky solution so instead of

Java

while(!ms.isDataReady);

I put

Java

while(!ms.isDataReady) Thread.sleep(1);

Richard MacCutchan3-Dec-13 9:18

3-Dec-13 9:18

Your while statement is not the best way to wait for something to happen, as it will just lock the processor, spinning on that statement.

Veni, vidi, abiit domum

Kujtim Hyseni3-Dec-13 9:20

3-Dec-13 9:20

What do you suggest instead ... ?

Richard MacCutchan3-Dec-13 9:43

3-Dec-13 9:43

Well that depends on what you are trying to do. What is the interaction between these two threads and what is the first one waiting for?

Veni, vidi, abiit domum

Kujtim Hyseni3-Dec-13 9:48

3-Dec-13 9:48

Here are the details of the problem:
I have a class MISPSerial (instance named ms) which deals for stream of bytes to arrive via serial port. In my class which contains the main method I wait for the variable (ms.isDataReady) in MISPSerial which tells that the stream is received completely. So my main method waits for the stream to be received and then continues with instructions that follow. What would you suggest?

Richard MacCutchan3-Dec-13 10:35