473,836 Members | 2,005 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Swing draw points

17 New Member
I want to loop through an array of numbers and use those to plot points. What method should I be thinking of? I know there's one that takes an X and Y coordinate and draws points. Is there one that draws bars, too?
Nov 24 '08 #1
4 5483
JosAH
11,448 Recognized Expert MVP
@KiddoGuy
A bar basically is just a rectangle; a Graphics object can draw rectangles.

kind regards,

Jos
Nov 25 '08 #2
KiddoGuy
17 New Member
Ok, thanks. Can you give me a sample usage? Or is something like this correct?
Expand|Select|Wrap|Line Numbers
  1. java.awt.Panel panel = new java.awt.Panel();
  2. panel.getGraphics().drawRect(1,2,3,4);
  3.  
Would something like that work?
Nov 25 '08 #3
KiddoGuy
17 New Member
Actually, now my problem is when I'm trying to draw on a Panel. When I call getGraphics() it returns null...
Nov 25 '08 #4
JosAH
11,448 Recognized Expert MVP
@KiddoGuy
Read Sun's Swing tutorial. The AWT event dispatch thread calls the paint() method which calls the paintComponent( ) method; that's the method you have to override (re-implement) if you want to draw your own stuff. Your approach is not going to work.

kind regards,

Jos
Nov 25 '08 #5

Sign in to post your reply or Sign up for a free account.

Similar topics

5
13970
by: Chris | last post by:
Having been traumatised many years ago when using MFC/C++ to develop front-end code, I've religiously avoided GUI work since and stuck to back-end / server-side projects. So I'm a bit of a novice when it comes to designing Swing-based applications. I'm now having to do more and more GUI work to support my current projects, so I started looking for tutorial / best-practices materials on the net. I was somewhat surprised to find that...
6
6424
by: Joseph | last post by:
hi 1) i plan on having an awt canvas component (to draw graphs) on a JFrame with other swing components..will this be okay? i've read that swing and awt aren't compatible.. 2)Also, if i have a function which simply loops infinately that is part of a form, what happens when a form event (eg button click) occurs? will the event handler be executed simulatanesouly with the loop? or does the event excecute first and then the loop is...
2
7368
by: frank_ulbricht | last post by:
Hi folks, I'm a Java programmer and now I have to use C# for a new large project. The language is the best I've ever seen. In some points it goes far beyond Java. I like that. But then there was a great dissappointments about WinForms. Compared with Java/Swing (skip the performance, I mean the development) it is very poor at first sight. It reminds me when I startet in 1995 with Delphi (guess a guy named Heilsberg is the reason ...
4
5164
by: thomasp | last post by:
I found the following code on MSDN to draw a line in VB2005. Public Sub DrawLinePoint(ByVal e As PaintEventArgs) ' Create pen. Dim blackPen As New Pen(Color.Black, 3) ' Create points that define line. Dim point1 As New Point(100, 100) Dim point2 As New Point(500, 100)
1
12725
by: balakrishnan.dinesh | last post by:
Hi frnds, Im creating function to plot line graph in javascript . I have marked the points in graph. but what i need to do is, i want to draw the line between those marked point, but i dont konw how to draw line betwwen the marked points The output for my function will be like this , So the marked point (*) should be connected through lines,
5
9247
by: lgeastwood | last post by:
I have tweaked the PictureBox97.mdb (Stephen Lebans <www.lebans.com>) code to nicely draw lines, rectangles and circles to the specs that I input. I'm at a loss though with trying to setup an Ellipse Drawing Function. The following code I found on Google works in VB5 and draws an ellipse shape no problem using the Circle Method. Private Sub cmdDrawEllipse_Click() Dim X As Long, Y As Long Dim ElipseWidth As Integer, ElipseHeight As...
1
4513
by: jojojjose | last post by:
function draw() { var s=''; s+='<v:polygon points="'; s+= //points from server s+="> </v:polygon>'"; document.wrie(s); }
3
2085
by: aleplgr | last post by:
Hi! I'm trying to draw some filled rectangles in a JPanel, should I define a paintComponent like this? public void paintComponent(Graphics g) { super.paintComponent(g); g.setColor(Color.blue); g.drawRect(10, 10, 80, 30); g.drawRoundRect(100, 10, 80, 30, 15, 15); Or is there any other way to do it? maybe using some Swing component, for example the JTextField is like a rectangle and I could change the background color and...
6
51173
by: r035198x | last post by:
I have put together this article to give people starting Swing an awareness of issues that need to be considered when creating a Swing application. Most of the Swing tutorials that I have seen just help people display some nice widgets quickly without explaining some issues that need to be tackled when a full application needs to be developed. This article does not go into full implementation details because those can be found by reading the...
0
9810
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, weíll explore What is ONU, What Is Router, ONU & Routerís main usage, and What is the difference between ONU and Router. Letís take a closer look ! Part I. Meaning of...
0
9656
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10819
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
10570
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10240
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
6972
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5641
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
4438
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
3100
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.