Java swing drawing-How to draw in JPanel? (Swing/graphics Java) - Stack Overflow

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. So i have to draw a diamond shape. Not a Static diamond but a diamond that i will myself drag and draw. I've used General Path to do it but it is drawing a diamond that is not straight; the diamond is bend to the left and it's not being drawn to where my mouse is pointed.

Java swing drawing

Java swing drawing

Modify the program so that the space between the circles is larger or smaller. Dwing code Java swing drawing to make our text look better. At times, we need to explicitly refresh the display e. UIManager; import javax. I don't know where to Java swing drawing the graphics class. Each action event, we call the repaint method. This function serves both purposes. JFrame; import javax.

Boyfriend dealing with girlfriend mood swings. 1. The Circle

Similarly x2 and y2 are the coordinates of second point of line. ActionListener; import java. For a very simple example of painting in Java, please see my reply in this thread: changing-jpanel-graphics-g-color-drawing-line. I need to draw inside a JPanelinside my JFrame. You can draw circle and oval with the help of Java swing drawing Graphics. It occurs to me that someone might not want to think in terms of graph paper: Graphics2D g. I dont know…the code doesnt put out anything if run on my machine. I'm working on a project in which I am trying to make a paint program. But I'll try you suggestion. Sign up or log in Sign up Java swing drawing Google.

In this article we create an application that randomly puts shapes on a JPanel.

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  • In this article we create an application that randomly puts shapes on a JPanel.

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

So i have to draw a diamond shape. Not a Static diamond but a diamond that i will myself drag and draw. I've used General Path to do it but it is drawing a diamond that is not straight; the diamond is bend to the left and it's not being drawn to where my mouse is pointed. The 2D Shape API is actually really powerful, one of my favourite classes is the Path2D , it allows you to simply "draw" a virtual shape, for example.

Now, you need to make use of an AffineTransformation or translate the Graphics context to position it, but that's not that hard. Episode of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now. How to draw a diamond shape in java?

Ask Question. Asked 4 years, 7 months ago. Active 4 years, 7 months ago. Viewed 7k times. Here is my code to create the diamond shape. Can someone please help me solve this? Lana Lana 86 4 4 silver badges 15 15 bronze badges. Shouldn't you rotate it 90 degrees? Don't you mean 45? MadProgrammer When i rotate it to 90 degrees, it's not being drawn at all.

PieterDeBie When i put to to 45 degrees, the shape is drawn but it's not drawn at my mouse position. Is your pivot point in the center of your rectangle?

How about instead of rotating a rectangle, you draw lines between 4 points inside a rectangle: the points: excuse my poor mspaint skills. Subler Subler 6 6 silver badges 10 10 bronze badges. Thank you so much : i've used line2D to do it. Thank you.

This might be useful too. MBo MBo 54k 2 2 gold badges 35 35 silver badges 55 55 bronze badges. The 2D Shape API is actually really powerful, one of my favourite classes is the Path2D , it allows you to simply "draw" a virtual shape, for example public class Diamond extends Path2D. Color; import java. Dimension; import java. EventQueue; import java. Graphics; import java. Graphics2D; import java. Shape; import java. AffineTransform; import java. Path2D; import javax. JFrame; import javax.

JPanel; import javax. UIManager; import javax. RED ; g2d. MadProgrammer MadProgrammer k 17 17 gold badges silver badges bronze badges.

But i would like to drag and draw the triangle. Can i use path2D to do this? Lana You had better believe it Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Why Devs Should Like Estimates. Featured on Meta. Feedback post: Moderator review and reinstatement processes. Post for clarifications on the updated pronouns FAQ. I'm resigning as a Stack Overflow community elected moderator.

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But as a good programming practice and as a remainder, we do it nevertheless. If you're using Swing, you need to extend JComponent and override paintComponent, instead. Put this component into the GUI of your application. With a responsibility of Java based Web development professionally, I highly believe in imparting knowledge online for any technical subject that I can handle. I'm wondering if there's a funciton in Java that can draw a line from the coordinates x1, x2 to y1, y2? I could not understand, you drawing a line on your JFrame , then you adding components on your JFrame , so what this line is for, if you want to hide this with your components. It occurs to me that someone might not want to think in terms of graph paper: Graphics2D g.

Java swing drawing

Java swing drawing

Java swing drawing. Screen Shot

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Custom Graphics Programming - Java Programming Tutorial

The Java library includes a simple package for drawing 2D graphics, called java. There are several ways to create graphics in Java; the simplest way is to use java. Canvas and java.

A Canvas is a blank rectangular area of the screen onto which the application can draw. The Graphics class provides basic drawing methods such as drawLine , drawRect , and drawString.

The Drawing class extends Canvas , so it has all the methods provided by Canvas , including setSize. Once the frame is visible, the paint method is called whenever the canvas needs to be drawn; for example, when the window is moved or resized. If you run this code, you should see a black circle on a gray background. You are probably used to Cartesian coordinates , where x and y values can be positive or negative.

In contrast, Java uses a coordinate system where the origin is in the upper-left corner. That way, x and y are always positive integers. Graphical coordinates are measured in pixels ; each pixel corresponds to a dot on the screen. To draw on the canvas, you invoke methods on a Graphics object. The four parameters specify a bounding box , which is the rectangle in which the oval is drawn.

To choose the color of a shape, invoke setColor on the Graphics object:. The setColor method determines the color of everything that gets drawn afterward. Other colors include:.

You can create your own colors by specifying the red, green, and blue RGB components. For example:. Each value is an integer in the range 0 darkest to lightest. You can set the background color of the Canvas by invoking setBackground :. We can use the oval we just drew as the face, and then add two ears. The first line draws the face. The next three lines create a smaller rectangle for the ears. We translate the rectangle up and left for the first ear, then to the right for the second ear.

The code for this chapter is in the ap02 directory of ThinkJavaCode. See page?? Before you start the exercises, we recommend that you compile and run the examples. Hint: You should only have to add or modify a few lines of code. Here is an example program that draws a circle using the fillOval method: import java. Canvas; import java. Graphics; import javax. In the main method, we: Create a JFrame object, which is the window that will contain the canvas.

Create a Drawing object which is the canvas , set its width and height, and add it to the frame. Pack the frame resize it to fit the canvas, and display it on the screen. Figure B. Open it and read the paint method. Draw a sketch of what you expect it to do. Now run it. Did you get what you expected? Modify the program so that the space between the circles is larger or smaller.

See what happens to the image. Book version 6.

Java swing drawing