paint

问题 I'm currently working with JFrame and I'm trying to draw a rectangle but I don't know how to execute the code paint(Graphics g) , how do I get the Graphics object? package com.raggaer.frame; import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JFrame; public class Frame { private JFrame frame; public Frame() { this.frame = new JFrame("Java Snake"); this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.frame.setSize(new Dimension(500, 500)); // DRAW?? this.frame

问题 I'm currently working with JFrame and I'm trying to draw a rectangle but I don't know how to execute the code paint(Graphics g) , how do I get the Graphics object? package com.raggaer.frame; import java.awt.Dimension; import java.awt.Graphics; import javax.swing.JFrame; public class Frame { private JFrame frame; public Frame() { this.frame = new JFrame("Java Snake"); this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.frame.setSize(new Dimension(500, 500)); // DRAW?? this.frame

问题 So I used tutorials from http://zetcode.com/tutorials/javagamestutorial/basics/ and I'm using the Donut program. For anyone unfamiliar it does this http://zetcode.com/img/gfx/javagames/donut.png I want to make the ellipses rotate around the center of the window, to make it look like it's moving in a circle. The code so far is the code from the webpage. package donut; import javax.swing.*; import java.awt.*; import java.awt.geom.AffineTransform; import java.awt.geom.Ellipse2D; public class

问题 I am trying to make a simple snake game on console. I am using an int matrix to store all the data (borders, snake, food to eat) at their exact location. I use this main code for now to run the program : int main() { int tab[28][120]; create(tab, 28, 120); paint(tab, 28, 120); char i = '1'; char direction = 'R'; while(i != 'q') { if (kbhit()) i =getch(); translate(tab, direction, 28, 120); paint(tab, 28, 120); Sleep(300); } } The main problem being, every time I repaint the matrix, it

问题 When I run the application the whole frame is painted black. How can I make it so that it starts out clear then it gets painted when I press the button? package card; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class BdayCard extends JFrame { JButton button1, button2; JPanel panel; BdayCard() { panel = new JPanel(); button1 = new JButton(); button1

问题 I'm trying to draw lines over my JTable using a Painter object that I've made, but for some reason table.getGraphics() returns null. Painter class: import java.awt.BasicStroke; import java.awt.Graphics; import java.awt.Graphics2D; import javax.swing.JTable; public class Painter extends JTable { public Painter(){ } public void paintSudokuLines(Graphics g){ paintComponent(g); } public void paintComponent(Graphics g){ super.paintComponent(g); Graphics2D g2 = (Graphics2D) g; g2.setStroke(new

问题 I have draw a circle using paint and canvas in android . I want to move the circle in some direction, are there any API methods that can be used ? Or do I have to use a loop and changing the position each time? 回答1: Hi you can refer the code below, In onTouchEvent, you can handle directions and move the object. // Tutorial2D.java main activity import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.Window; public class Tutorial2D extends

问题 I'm trying to make an android kids coloring book app, and when I'm firstly drawing with one color its ok, but when I change the brush color, all the previous coloring changes color as well. What can be the solution of this problem? Starting to paint with one color: After changing the color and making another stroke this is what's happens Here is my SignatureView class that is for this drawing surface: public class SignatureView extends View { private float STROKE_WIDTH = 5; /** Need to track

问题 I'm trying to render the contents of a the Java/Swing Cobra HTML renderer to an offscreen BufferedImage, for use elsewhere in my app: slideViewPanel.setDocument(document, rendererContext); BufferedImage test = new BufferedImage(300,300,BufferedImage.TYPE_INT_RGB); Graphics g = test.getGraphics(); slideViewPanel.paint(g); The resulting image in g shows a partially rendered page -- sometimes the contents of the HTMLFrame before the new document was set; sometimes a half-rendered version of the

问题 I am having issues with my Applet not painting the required graphics. For some reason, it updates the coloring in the graphics, as you can see this when it prints, it recognizes the mouse is being moved, the graphics are not null, but it still refuses to paint. How can this be fixed? import java.awt.*; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionListener; import javax.swing.JApplet; public class GameApplet extends JApplet implements