Please help me to draw a special line Chart!

Question

Hi, I am programming to draw a line chart with X-axis as timepoint (for example, t1, t2, t3, t4, ...) and Y-axis as values (v1, v2, v3,v4,...) and have a line connecting all the (t, v) point. The issue I have encountered is that when a value (for example, v3) is missing at the timepont(t3), I still want the timepoint to show on X-axis but the connectiong line to stop at (t2, v2) and start again at (t4, v4). Is it possible to draw such a line chart? Is there any 3rd party supporting it? If so, may you please give me hints and help me out of this? Thanks alot.

Answer 1

I did find this:
import java.awt.event.*;
import java.awt.*;
public class Pxy extends Frame 
public Pxy()
     addWindowListener(new WindowAdapter()
    {     public void windowClosing(WindowEvent ev)
          {     dispose();
               System.exit(0);}});
     setBounds(1,1,670,450);
     txy pan = new txy();
     add(pan);     
     setVisible(true);
public class txy extends Panel
     int xt[] = {1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1};
     int yv[] = {40,15,30,90,105,128,120,98,199,250,269,203,90,210,200,145};
     int sx = 40;
     int sy = 30;
public txy()
     super();
     setBackground(Color.pink);
public void paint(Graphics g)
     g.setColor(Color.white);
     for (int i=0; i < 21; i++)
          g.setColor(Color.white);
          g.drawLine(i*30+sx,sy,i*30+sx,sy*10);
          g.setColor(Color.blue);
          g.drawString(""+i*30,i*sy+sy+2,30*10+30/2);
     for (int i=0; i < 10; i++)
          g.setColor(Color.lightGray);
          g.drawLine(sx,i*30+sy,20*30+sx,i*30+sy);
          g.setColor(Color.blue);
          g.drawString(""+i*30,10,i*sy+sy+2);
     g.setColor(Color.black);
     for (int i=0; i < xt.length-1; i++)
          if (xt[ i ] == 1)
          g.drawLine(i*30+sx,yv[ i ]+sy,(i+1)*30+sx,yv[ i+1 ]+sy);
public void update(Graphics g)
     paint(g);
public static void main(String[] args )
     new Pxy();