我想通过重新绘制一个框移动到一个JFrame,但由于某种原因,我不知道它不会工作。我知道它可能是一些非常愚蠢的东西,但是这里是我的类:(也抱歉格式化了它在屁股上的痛苦......)它给了我一个关于frame.add(方形)行的错误。奇怪的JFrame问题
import javax.swing.JFrame;
import javax.swing.WindowConstants;
public class Runner extends JFrame{
final static int FRAME_WIDTH = 1000;
final static int FRAME_HEIGHT = 600;
final static int BOX_WIDTH = 50;
final static int BOX_HEIGHT = 50;
public static void main (String[] args){
JFrame frame = new JFrame();
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setTitle("Animation");
frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
frame.setVisible(true);
Component square = new Component();
Dimensions.setBoxDimensions(BOX_WIDTH, BOX_HEIGHT);
frame.add(square);
frame.setVisible(true);
for (int i = 0; i < 100; i++){
Dimensions.setPosition(i,i);
square.repaint();
frame.setVisible(true);
}
}
}
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
public class Component extends JFrame{
public void paintComponent (Graphics g){
Graphics2D g2 = (Graphics2D) g;
g2.fillRect(Dimensions.xPos, Dimensions.yPos, Dimensions.boxWidth, Dimensions.boxHeight);
}
}
public class Dimensions {
public static int boxHeight = 50;
public static int boxWidth = 50;
public static int xPos = 0;
public static int yPos = 0;
public static void setBoxDimensions(int width, int height){
boxHeight = height;
boxWidth = width;
}
public static void setPosition(int x, int y){
xPos = x;
yPos = y;
}
}
so JPanel panel = new JPanel(); 然后panel.add(square); ?? – Evan 2012-03-13 02:31:49
我添加了一些示例来帮助。 – 2012-03-13 02:35:54
命名您自己的类Component可能会导致一些问题,因为存在java.awt.Component,即使可以完成。所以我为了方便将它重命名为MyComponent。 – 2012-03-13 02:36:57