repaint

I'm stuck with a problem considering my Display class, which extends Canvas. A single thread is running within the very same class. In this thread, the repaint method is called. However, while the thread works fine, the paint method is never called! Here's my code (I left out everything unrelated): package display; public final class Display extends Canvas implements Runnable { private static final long serialVersionUID = 1L; private Frame frame; private GraphicsEnvironment ge; private GraphicsDevice gd; public BDisplay() { ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); gd = ge

I have a Winform program that does some calculations when the user clicks on a button and then calls the picturebox paint event to draw a new BMP based on the results of the calculations. This works fine. Now I want to do this 100 times and every time the picturebox is refreshed, I want to see the iteration that it's currently in by updating the text on a label as per below: private void button2_Click(object sender, EventArgs e) { for (int iterations = 1; iterations <= 100; iterations++) { // do some calculations to change the cellmap parameters cellMap.Calculate(); // Refresh picturebox1

In code I am calling repaint() method from init() method but Output is not as per I expect. I called repaint() method 10 times but It called paint() only once(See Screenshot of O/P). Am I making any mistake. please help me. Thanks code import java.awt.*; import java.applet.Applet; /* <applet code="test" height=300 width=300> </applet> */ public class test extends Applet { int x,y; public void init() { x=5; y=10; for(int i=1;i<10;i++) { System.out.println("From init "+i); x+=(i*2); y+=(i*3); repaint(); } } public void paint(Graphics g) { System.out.println("Paint"); g.drawLine(50,50,x,y); } }

i use the java repaint method , it repaints, but the update is only seen when I either click on the canvas or resize the panel. How can I fix this ? What causes it? You need to call the method revalidate(). This forces the layout manager to update / repaint all its components. repaint() isn't actually repainting, it's just requesting a repaint of the component. Marc Kirschner It may be helpful to simply grab the Graphics object from the component you wish to paint. Then just invoke a paint method on the Graphics object. For example: g = component.getGraphics(); draw(g); 来源： https:/

I am trying to make a 2D game with Java and Swing, and the window refreshes too slow. But if I move the mouse or press keys, the window refreshes as fast as it should! Here is a GIF showing how the window refreshes quickly only when I move the mouse. Why does the window refresh slowly like that? Why does the mouse and keyboard affect its refresh rate? How, if possible, do I make it refresh quickly all the time? Background Info I use a javax.swing.Timer to update the game state every 1/25 seconds, after which it calls repaint() on the game panel to redraw the scene. I understand that a Timer

I have some methods in my View that modify some of the shapes that are drawn when called. In Java in order to make sure the component is updated I would call repaint() . Is there something that will make sure my view is updated correctly? I had read somewhere that calling invalidate() in the onDraw() method would keep things up to date and therefore I wouldn't need to have something like repaint() in my methods that modify that shapes that are drawn. Is this correct, or is there something else I have to do? EDIT To add in an example, a method I call in my view is: public void setLineThickness