Help with graphing program

[Bill Cappoli]

I have a program that requests a series of numbers from the user. Once everything is inputted the frequency of each number within a range is supposed to be graphed in a JFrame. The graph basically would show on the y-axis the ranges, ie 10-19, 0-9, and the x-axis would show the number falling into each range using a rectangle coming out of the location of the range on the y-axis. I have been able to program everything from the input to the actual bar graph. My problem is I have been unable to put the finishing touches on the graph which are the title, the axis labels, and the labels for the data. I have tried some things with Swing and AWT but with my newbie understanding of Java the results were not good. Here is the code I already have:

    
import java.io.*;
import javax.swing.*;
 
public class Histogram {
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        
        // creates
        int inputtedValue[] = new int[ 10 ];  // array to hold inputted data
        
        for( int inputCounter = 0; inputCounter < inputtedValue.length; inputCounter++ ) {
            String input = JOptionPane.showInputDialog
                    ("Please enter a number between 0 and 99\n" +
                    "Stop entering values at any time by entering -1.\n");
                        
            int numberProvided = Integer.parseInt(input);
            inputtedValue[ inputCounter ] = numberProvided;
        }
            
        HistogramFreq freqCalc = new HistogramFreq(inputtedValue);
        int[] freqs = freqCalc.getValues();
                
        JFrame f= new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new H3(freqs));
        f.setSize(400, 400);
        f.setLocation(200, 200);
        f.setVisible(true);
    } // end main
} // end class Histogram

import java.awt.*;
import javax.swing.*;
 
public class HistogramFreq {
    int[] frequency;
    int range = 10;
    
    public HistogramFreq(int[] inputtedValue) {
        determineFrequency(inputtedValue);
    }
    
    public int[] getValues(){
         
        return frequency;
    }
    
    public void determineFrequency(int[] valuesProvided){
        // stores frequency of inputted numbers in the appropriate ranges
        frequency = new int [range];
        
        // for each range increment the appropriate range
        for( int valueEntered : valuesProvided)
            ++frequency[valueEntered/range];
    }  // end method determineFrequency()
} // end class HistogramFreq
    

 
import java.awt.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;
 
public class H3 extends JPanel {
    int[] data;
    final int PAD = 40;
    final int BAR_HEIGHT = 25;
 
   H3(int[] data) {
        this.data = data;
        System.out.print(Arrays.toString(data));
    }
 
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        // draw axes
        g2.draw(new Line2D.Double(PAD, PAD, PAD, h-PAD));
        g2.draw(new Line2D.Double(PAD, h-PAD, w-PAD, h-PAD));
        int numBars = data.length;
        double yInc = (double)(h - 2*PAD - numBars*BAR_HEIGHT)/(numBars-1);
        int maxValue = getMaxValue();
        double unitLength = (double)(w - 2*PAD)/maxValue;
        // plot data
        g2.setPaint(Color.blue);
        for(int j = 0; j < numBars; j++) {
            double y = PAD + j * (BAR_HEIGHT + yInc);
            double width = unitLength*data[j];
            g2.fill(new Rectangle2D.Double(PAD, y, width, BAR_HEIGHT));
        }
    }
 
    private int getMaxValue() {
        int max = -Integer.MAX_VALUE;
        for(int j = 0; j < data.length; j++) {
            if(data[j] > max)
                max = data[j];
        }
        return max;
    }
}
   

[marc weber]

"SilentCodingOne,"

Welcome to JavaRanch! Please check your private messages by clicking on My Private Messages. Thanks!

[marc weber]

Originally posted by Bill Cappoli:
... My problem is I have been unable to put the finishing touches on the graph which are the title, the axis labels, and the labels for the data...

Currently, your JFrame contains only a JPanel. It sounds like you want to add some JLabels alongside your JPanel. In doing this, you might want to look at Laying Out Components Within a Container from the Swing Tutorial.