Question

java paint图形没画出来

import java.awt.*;
public class TestPaint {
public static void main(String args[]) {
new PaintFrame().launchFrame();
}
}

class PaintFrame extends Frame {
public void launchFrame() {
setBounds(200,200,640,480);
setVisible(true);
}
public void Paint(Graphics g) {
Color c = g.getColor();
g.setColor(Color.red);
g.fillOval(50, 50, 30, 30);
g.setColor(Color.green);
g.fillRect(80,80,40,40);
g.setColor(c);
}
}

Answer 1

public void paint (Graphics g)

p 小写。

然后最好在 paint 的第一句加上 super.paint(g);