paint

问题 I am following a the following video to design a snake game: https://www.youtube.com/watch?v=91a7ceECNTc I am following it step by step, but when I run it, the snake does not show on my screen, just the apple. I think I have something wrong when implementing public void paint(Graphics g); Can someone help me? This is the code my Main class import javax.swing.JFrame; public class Main { public static void main(String[] args) { JFrame frame = new JFrame (); GamePanel panel = new GamePanel();

问题 I am following a the following video to design a snake game: https://www.youtube.com/watch?v=91a7ceECNTc I am following it step by step, but when I run it, the snake does not show on my screen, just the apple. I think I have something wrong when implementing public void paint(Graphics g); Can someone help me? This is the code my Main class import javax.swing.JFrame; public class Main { public static void main(String[] args) { JFrame frame = new JFrame (); GamePanel panel = new GamePanel();

问题 my problem is that I need to save the things that I draw with java graphics as independent objects, to later recolor them, erase them indepently... Here is my eclipse project for you to import. (The main class is the Paint class) This is the method I use to draw: protected void paintComponent(Graphics g) { if (imagen == null) { imagen = createImage(getSize().width, getSize().height); graficos = (Graphics2D) imagen.getGraphics(); graficos.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

问题 am creating an app in which people can draw a sketch and save to the gallery. This I have done and is working fine. What I would like to be able to do is take an image from the Gallery and be able to draw on that. I have been able to bring up the Gallery to pick the image but I haven't been able to work out how to imbed that image onto the canvas to then draw on but the prob is , it opens up the gallery...but when i click on any pic to open up, it just goes back to app, but not with the

问题 am creating an app in which people can draw a sketch and save to the gallery. This I have done and is working fine. What I would like to be able to do is take an image from the Gallery and be able to draw on that. I have been able to bring up the Gallery to pick the image but I haven't been able to work out how to imbed that image onto the canvas to then draw on but the prob is , it opens up the gallery...but when i click on any pic to open up, it just goes back to app, but not with the

问题 am creating an app in which people can draw a sketch and save to the gallery. This I have done and is working fine. What I would like to be able to do is take an image from the Gallery and be able to draw on that. I have been able to bring up the Gallery to pick the image but I haven't been able to work out how to imbed that image onto the canvas to then draw on but the prob is , it opens up the gallery...but when i click on any pic to open up, it just goes back to app, but not with the

问题 I am trying to make an animation with multiple thread. I want to paint n squares where this n comes from commend-line argument. Every square has their x-y coordinates, colors and speed. They are moving to the right of the frame with different speed, color and coordinates. Since I am using multi thread I assume I have to control each squares. So I have to store each square object in the ArrayList. However, I am having trouble with painting those squares. I can paint one square but when I try

问题 I am trying to make an animation with multiple thread. I want to paint n squares where this n comes from commend-line argument. Every square has their x-y coordinates, colors and speed. They are moving to the right of the frame with different speed, color and coordinates. Since I am using multi thread I assume I have to control each squares. So I have to store each square object in the ArrayList. However, I am having trouble with painting those squares. I can paint one square but when I try

问题 I am trying to make an animation with multiple thread. I want to paint n squares where this n comes from commend-line argument. Every square has their x-y coordinates, colors and speed. They are moving to the right of the frame with different speed, color and coordinates. Since I am using multi thread I assume I have to control each squares. So I have to store each square object in the ArrayList. However, I am having trouble with painting those squares. I can paint one square but when I try

问题 After making an instance in a previous frame, I'm trying to the background image on the next frame but as a result, I just saw the debugged result and found out that the paint method was not called. From what I know, the paint method is inherited by the JFrame class and with this logic, I've made it overrided. As I guess, the reason happen the logical error is from what I used the event handler and made the instance in the EventHandlerClass. if(e.getActionCommand().equals(ButtonTo)) if