Question

请问Java swing编程如何让左键点击绘制图形？

代码：
public class MyActionListener {
public void add() {
Creater.Jframe.addMouseListener(new MouseListener() {
public void mouseClicked(MouseEvent ME) {
int x = ME.getX();
int y = ME.getY();
if(ME.getButton() == MouseEvent.BUTTON1){
G.drawImage(ImageIO.read(new FileInputStream("这里是路径")), x, y, null);
}
}

public void mouseEntered(MouseEvent ME) {
}

public void mouseExited(MouseEvent ME) {
}

public void mousePressed(MouseEvent ME) {
}

public void mouseReleased(MouseEvent ME) {
}

});

}

}

Answer 1

public void paintComponent(Graphics g)
{
super.paintComponent(g);//加上这句
if(boo)
g.fillOval(x, y, 20, 20);
}

追问

看好了，paintComponent在哪里？