paintcomponent

I am trying to create a program with 2 JPanel using BorderLayout . The center panel is for random drawing of rectangle while the south panel is for the buttons. I am getting a weird image of the button on the top left corner of the JFrame whenever I hover the mouse cursor over the North or South button. I did some research and found out that this could be the reason for having a transparent background. I tried using super.paintComponent(g) for the panel but the rest of the rectangles drawn earlier disappear. I need the rectangles to stay in the JPanel but not the weird image on the top left. I

I'm trying to make it so that both shapes move when the commands are pressed. My question is: How do I get the blue polygon to move along with the yellow rectangle? I can't seem to figure it out, no matter what I do. Any help is appreciated! thanks! EDIT: Removed Timer Code (it is for something different) import javax.swing.JFrame; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import javax.swing.JComponent; import java.awt.geom.Ellipse2D; import java.awt.geom.Line2D; import java.awt.Color; import java.awt.Polygon; import java.util.Scanner; import java.awt

I thought I would try and write a program that would paint a ball, and when the arrow keys are pressed, would move the ball around the screen in the direction pressed. First I started off to try and make a program that would just do "UP" arrow key motion. I've looked around for a solution, and just can't figure out what's wrong with this code. I don't know if it's a problem with my input and action maps (i.e., a problem with the program recognizing key presses) or if it's a problem with how the JComponent and JFrame classes work in swing. I thought maybe the problem might also be focus; I don

I'm using paintComponent() to paint a gif animated image at the backgound of JPanel . It shows up the gif but doesn't animate. I use java 1.5 and i know that i can use label with icon. Does any body know why and how to fix it? private static class CirclePanel extends JPanel { ImageIcon imageIcon = new ImageIcon(BarcodeModel.class.getResource("verify.gif")); Point point = f.getLocation(); protected void paintComponent(Graphics g) { Graphics gc = g.create(); Graphics2D g2d = (Graphics2D) g.create(); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d

hi there i'm trying to improve myself about java2D and first of all i'm dealing with drawing polygons. However, i can not see the polygon on frame. I read some tutorials and examples but as i said i face with problems. here is the sample code of drawing a polygon; import java.awt.Color; import java.awt.Graphics; import java.awt.Polygon; import javax.swing.JFrame; public class jRisk extends JFrame { private JFrame mainMap; private Polygon poly; public jRisk(){ initComponents(); } private void initComponents(){ mainMap = new JFrame(); mainMap.setSize(800, 600); mainMap.setResizable(false);

This is a code for drawing points on calculated locations by Bresenham's algorithm: public void drawBresenhamPoints(Graphics2D g2, List<Point> bresenham) throws InterruptedException { Graphics2D g = (Graphics2D) g2; if(bresenham == null) return; g.setColor(Color.DARK_GRAY); for(int i = 0; i < bresenham.size(); i = i+20) { int x = bresenham.get(i).x - pointWidth1/2; int y = bresenham.get(i).y - pointWidth1/2; int ovalW = pointWidth1; int ovalH = pointWidth1; g.fillOval(x, y, ovalW, ovalH); // delay try { Thread.sleep(10); } catch(Throwable e) { System.out.println(e.getMessage()); } } } The list

Since Java only supports single inheritance , I desire to paint directly on an instance of a JPanel that is a member of the class Panel . I grab an instance of Graphics from the member and then paint whatever I desire onto it. How can I not inherit from JComponent or JPanel and still utilize getGraphics() for painting on this without overriding public void paintComponent(Graphics g) ? private class Panel { private JPanel panel; private Grahics g; public Panel() { panel = new JPanel(); } public void draw() { g = panel.getGraphics(); g.setColor(Color.CYAN); g.draw(Some Component); panel.repaint(