Using threads and graphics

[Manoj Zachariah]

this is the first time im using threads. ended up with a problem in the code below. im trying to draw a moving line using the thread

  
import java.awt.*;
import javax.swing.*;
class Left implements Runnable
{
    int x,y,leg1;
    Thread t1;
    Left()
    {
        t1 = new Thread(this);
        t1.start();
    }
    public void run()
    {
        try
        {
            for(leg1=300;leg1<=600;leg1++)
            {
                repaint();
                t1.sleep(10);
            }
        }
        catch(Exception e)
        {
            System.out.print(e);
        }
    }
    public void paint(Graphics g)
    {
        g.clearRect(0,0,800,600);
        g.drawOval(400,200,50,50);
        g.drawLine(425,250,425,400);
        g.drawLine(425,400,leg1,500);
    }
}
 
public class Walking extends JFrame 
{
    
    public Walking() 
    {
        setBounds(0,0,800,600);
        setVisible(true);
    }
    public static void main(String a[])
    {
        Left l = new Left();
    }
}

this code gives me an error as below.

 
Walking.java [18:1] cannot resolve symbol
symbol  : method repaint  ()
location: class Left
                repaint();
                ^
1 error
 
 

thanks

[Norm Radder]

The compiler can't find the method repaint().
Where is it defined in your code?

There is a repaint() method defined in the Component class.
Does your Left class extend Component or any derivatives of it?
It only implements Runnable, so it won't get ANY of Component's methods.

There are some code examples on this forum that will show you how to use paint() and repaint(). Use search. Rewrite your code and come back again later if you have problems.
Good luck.