PROBLEM WITH GRAPH DRAWING PACKAGE

Question

Hi all,
I have been trying to compile and run some code using "JOPenChart" a free charting tool, but I am having many problems.
Here is the small class:
import de.progra.charting.*;
import de.progra.charting.model.*;
import de.progra.charting.render.*;
import java.awt.*;
import java.io.*;
public class test{
public static void makeFirstChart() {
     int[][] model = {{0, 100, 200000}};     // Create data array
     double[] columns = {0.0, 1.0, 2000.0};  // Create x-axis values
     String[] rows = {"DataSet 1"};          // Create data set title
     String title = "A First Test";          // Create diagram title
     int width = 640;                        // Image size
     int height = 480;
     // Create data model
     DefaultChartDataModel data = new DefaultChartDataModel(model, columns, rows);
     // Create chart with default coordinate system
     DefaultChart c = new DefaultChart(data, title, DefaultChart.LINEAR_X_LINEAR_Y);
     // Add a line chart renderer
     c.addChartRenderer(new LineChartRenderer(c.getCoordSystem(), data,
     RowColorModel.getInstance(data)), 1);
     // Set the chart size
     c.setBounds(new Rectangle(0, 0, width, height));
     // Export the chart as a PNG image
     try {
          ChartEncoder.createEncodedImage(new FileOutputStream(System.getProperty("user.home")+"/first.png"), c, "png");
          } catch(Exception e)
               e.printStackTrace();
}//method
public static void main (String [] args)
     makeFirstChart();
}//classI have downloaded the JAR files from the web site. They are called:
"jep.jar"
"servlet.jar"
"charting-0.94.jar"
but they do not seem to make any difference and I still get compile errors:
C:\Proj\code\chart>javac test.java
test.java:1: package de.progra.charting does not exist
import de.progra.charting.*;
test.java:2: package de.progra.charting.model does not exist
import de.progra.charting.model.*;
test.java:3: package de.progra.charting.render does not exist
import de.progra.charting.render.*;I cannot work out how to let the cimpiler know that I want to use the said JAR files, or what else to do to solve the above situation...
Please help as this is CRITICAL to my University project!!!!
Any help would be much apprecicated!
Many thanks.

Answer 1

Does your classpath include the jars you list?
DB