Easiest Way to draw a graph

Question

Hi guys,
what is the easiest way to draw a graph in java?
Suppose I have 2 arrays. One array contains the x-coordinates. Another array contains the respective y-coordinates.
I do not need the graph to be smooth. Is there a API in java that allows the programmer to draw a graph simply? If not, please kindly advise what would be the easiest way to do it. I do not need the codes but just some suggestions and advice will be fine.
Many thanks for your time and attention!!
Regards

Answer 1

setClipArea and drawPolyline <--- good ideas, however, say 'thank you' and soon please. I did this app for someone at these forums a few months back - a line graph applet with labels etc - try it;-import java.awt.*;
public class LineGraff extends java.applet.Applet{
   double []toGraff = {6.0, -14.0, -164.0, -210.0, 108.0, 770.0,
                            1354.0, 896.0, -572.0, -1348.0, -780.0, -108.0};
   double []numsFromFile = {6.0, -14.0, -164.0, -210.0, 108.0, 770.0,
                            1354.0, 896.0, -572.0, -1348.0, -780.0, -108.0};
   int max, min, size, Hscale;
   double Vscale;
   public void init(){
      size = numsFromFile.length-1;
      java.util.Arrays.sort(numsFromFile);
      max = (int) numsFromFile[size];
      min = (int) numsFromFile[0];
      Vscale = max-min;
      Vscale = 200/Vscale;
     Hscale = Math.round(300/size);
   public void paint(Graphics g) {
      g.setFont(new Font("Arial",0,14));
      g.drawString("Example app: drawing a graph from a double array",25,18);
      g.setFont(new Font("Arial",0,10));
      g.setColor(Color.blue);
      g.fillRect(10,20,365,230);
      g.setColor(Color.cyan);
      g.drawLine(25,25,25,225);
      g.drawLine(25,140,330,140);
      g.setColor(Color.white);
      int intA = 30, intB = 0, intC = 0;
      int intD = (int) (Math.round(140 - (Vscale * toGraff[0])));
         for(int i=1; i <= size; i++) {
           intC = intA + Hscale;
           intB = intD;
           intD = (int) (Math.round(140 - (Vscale * toGraff[ i ])));
           g.drawLine(intA, intB, intC, intD);
              if(toGraff[ i ] > 0)
                 g.drawString(Double.toString(toGraff[ i-1 ]), intA+6, intB-3);
              else
                 g.drawString(Double.toString(toGraff[ i-1 ]), intA+6, intB+8);
           intA += Hscale;
      g.drawString(Double.toString(toGraff[size]), intA+6, intD-3);    
}