Updating A Graph

Question

Hey, i need to make a graph in a JFrame that will update every second from information stored in an array. I've been scouring old forum posts and nothing's really helping. The problem is though, that the graph is part of a program that must also be entirely usable when the graph is updating. Because of this, I dont really know which is the best way to go about making the graph. I've tried doing things with Timer and it was nothing but trouble. I don't want someone to write this for me, I just need some advice and a starting point.
thanx
cha_cha_

Answer 1

try this sample :
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.math.*;
import java.util.*;
import java.applet.*;
public class ecg extends JFrame
     myView  view = new myView();
     Vector  vr   = new Vector();
     data    tread;
public ecg() 
     setBounds(3,10,625,350);
     addWindowListener(new WindowAdapter()
    {     public void windowClosing(WindowEvent ev)
          {     dispose();
               tread.destroy();
               System.exit(0);}});
     getContentPane().add(view);
     getContentPane().setLayout(null);
     tread = new data(vr);
     setVisible(true);
     while (true)
          try
               view.move_1();
               repaint();
               Thread.sleep(100);
          } catch (InterruptedException e) {}
public class myView extends JComponent  
     BufferedImage I;
     Graphics2D G;
     Point p1;
     Point p2;
     int   width   = 600;  
     int   hight   = 301;
     int   point_s = 4;
     Color bcolor  = new Color(220,180,160);
public myView()
     setBackground(bcolor);
     setBounds(10,10,width,hight);       
     I  = new BufferedImage(width,hight,BufferedImage.TYPE_INT_ARGB);     
     G  = I.createGraphics();
     G.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);          
     clear(0,width);
public void move_1()
     if (vr.size() < 2) return;     
     G.drawImage(I,0,0,width-point_s,hight,point_s,0,width,hight,null);
     clear(width-point_s,point_s);
     p1 = (Point)vr.get(0);
     p2 = (Point)vr.get(1);
     G.setColor(Color.darkGray);     
     G.drawLine(width-point_s-1,p1.y+hight/2,width-1,p2.y+hight/2);
     vr.remove(0);
public void clear(int x, int w)
     G.setColor(bcolor);
     G.fillRect(x,0,w,hight);
     G.setColor(Color.lightGray);
     for (int y=0; y < 11; y++) G.fillRect(x,y*30,w,1);
public void paintComponent(Graphics g)
     super.paintComponent(g);
     g.drawImage(I,0,0,null);
public class data extends Thread
      Vector dv;
public data(Vector v)
     super();
     dv = v;
     this.start();
public void run()
     while (true)
          try
               while (dv.size() < 240)
                    int p = (int)(Math.random() * 260);
                    dv.add(new Point(0,p-130));
               Thread.sleep(2000);
          } catch (InterruptedException e) {}
public static void main (String[] args) 
     new ecg();
}      Noah
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.math.*;
import java.util.*;
import java.applet.*;
public class ecg extends JFrame
     myView view = new myView();
     Vector vr = new Vector();
     data tread;
public ecg()
     setBounds(3,10,625,350);
     addWindowListener(new WindowAdapter()
{     public void windowClosing(WindowEvent ev)
          {     dispose();
               tread.destroy();
               System.exit(0);}});
     getContentPane().add(view);
     getContentPane().setLayout(null);
     tread = new data(vr);
     setVisible(true);
     while (true)
          try
               view.move_1();
               repaint();
               Thread.sleep(100);
          } catch (InterruptedException e) {}
public class myView extends JComponent
     BufferedImage I;
     Graphics2D G;
     Point p1;
     Point p2;
     int width = 600;
     int hight = 301;
     int point_s = 4;
     Color bcolor = new Color(220,180,160);
public myView()
     setBackground(bcolor);
     setBounds(10,10,width,hight);
     I = new BufferedImage(width,hight,BufferedImage.TYPE_INT_ARGB);     
     G = I.createGraphics();
     G.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);          
     clear(0,width);
public void move_1()
     if (vr.size() < 2) return;     
     G.drawImage(I,0,0,width-point_s,hight,point_s,0,width,hight,null);
     clear(width-point_s,point_s);
     p1 = (Point)vr.get(0);
     p2 = (Point)vr.get(1);
     G.setColor(Color.darkGray);     
     G.drawLine(width-point_s-1,p1.y+hight/2,width-1,p2.y+hight/2);
     vr.remove(0);
public void clear(int x, int w)
     G.setColor(bcolor);
     G.fillRect(x,0,w,hight);
     G.setColor(Color.lightGray);
     for (int y=0; y < 11; y++) G.fillRect(x,y*30,w,1);
public void paintComponent(Graphics g)
     super.paintComponent(g);
     g.drawImage(I,0,0,null);
public class data extends Thread
     Vector dv;
public data(Vector v)
     super();
     dv = v;
     this.start();
public void run()
     while (true)
          try
               while (dv.size() < 240)
                    int p = (int)(Math.random() * 260);
                    dv.add(new Point(0,p-130));
               Thread.sleep(2000);
          } catch (InterruptedException e) {}
public static void main (String[] args)
     new ecg();