Help getting Histogram chart example working

**swilliams236** · 11-21-2011, 05:59 AM

I have a histogram chart that I was given as an example. As I understand it, it is supposed to be working code, however, I can't get it to successfully compile.

I keep getting an error "operator <= cannot be applied to int,int[]"

Can someone help me see what I am missing? Am I supposed to be passing data to it from a section of my code? I'm having an incredibly hard time with graphing even after reading the tutorials. I can draw pre-defined shapes such as lines, rectangles, etc. but I am struggling with this one.

Your help is greatly appreciated.

Java Code:

import javax.swing.*;

public class Histogram
{
 public static void main(String args[])
 {
  int n[] = {19, 3, 20, 7, 13, 19, 3, 19,1};
  String output = "";

  output += "Element \tValue\tHistogram";

  for (int i = 0; i < n.length; i++)
  {
   output += "\n" + i + "\t" + n + "\t";

   //prints the bar
   for (int j = 1; j <= n; j++)
    output += '*';
  }

  JTextArea outputArea = new JTextArea(11, 30);
  outputArea.setText(output);

  JOptionPane.showMessageDialog(null , outputArea,
  "Histogram Class",
  JOptionPane.INFORMATION_MESSAGE);

  System.exit(0);


 }
}