gui
我调试下面的代码:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class my{
public static void main(String args[]) {
new MyFrame99("drawing...");
}
}
class MyFrame99 extends Frame {
ArrayList<Point> points = null;
MyFrame99(String s) {
super(s);
points = new ArrayList<Point>();
setLayout(null);
setBounds(300,300,400,300);
this.setBackground(new Color(204,204,255));
setVisible(true);
this.addMouseListener(new Monitor());
}
public void paint(Graphics g) {
Iterator<Point> i = points.iterator();
while(i.hasNext()){
Point p = i.next();
g.setColor(Color.BLUE);
g.fillOval(p.x,p.y,10,10);
}
}
public void addPoint(Point p){
points.add(p);
}
}
class Monitor extends MouseAdapter {
public void mousePressed(MouseEvent e) {
MyFrame99 f = (MyFrame99)e.getSource();
f.addPoint(new Point(e.getX(),e.getY()));
f.repaint();
}
}
但是出错了 提示如下
F:\>javac my.java
my.java:27: x 可以在 Point 中访问 private
g.fillOval(p.x,p.y,10,10);
^
my.java:27: y 可以在 Point 中访问 private
g.fillOval(p.x,p.y,10,10);
^
my.java:27: 无法将 java.awt.Graphics 中的 fillOval(int,int,int,int) 应用于 (doub
le,double,int,int)
g.fillOval(p.x,p.y,10,10);
^请问是怎么没事谢谢