Need Graphics Help?

Question

Not sure if this is the right forum. ><
Basically, I'm having problems with painting in Swing. This is for school, and I'd love to ask my teacher, but he states that he knows absolutely nothing about graphics. The textbook covers AWT only, and java.sun.com was less than helpful.
My problem is that I can't get the thing I'm painting (in the method paintComponent) to show up. The buttons and labels show up fine, but the line that I'm trying to paint doesn't. Am I doing something really moronic?
Thanks for any help. @.@ Code below.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class BarChart extends JPanel implements ActionListener {
   double[] numbs = new double[5];
   JTextField ichi = new JTextField(5);
   JTextField ni = new JTextField(5);
   JTextField san = new JTextField(5);
   JTextField shi = new JTextField(5);
   JTextField go = new JTextField(5);
   private static JComponent contents;
   private static JFrame start;
   public static void main(String[] args) {
      BarChart app = new BarChart();
   //   JFrame.setDefaultLookAndFeelDecorated(true);
      start = new JFrame("BarChart");
      start.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        contents = app.createComponent();
        start.getContentPane().add(contents, BorderLayout.CENTER);
      start.pack();
      start.setVisible(true);
   public JComponent createComponent() {
      JPanel pane = new JPanel();
        pane.setBorder(BorderFactory.createEmptyBorder(
                                        30, //top
                                        30, //left
                                        30, //bottom
                                        30) //right
        pane.setPreferredSize(new Dimension(500,500));
      JLabel entr = new JLabel("Enter pints of blood donated in each of five departments and press ENTER in box 5.");
      JLabel one = new JLabel("1",SwingConstants.LEFT);
      JLabel two = new JLabel("2",SwingConstants.LEFT);
      JLabel three = new JLabel("3",SwingConstants.LEFT);
      JLabel four = new JLabel("4",SwingConstants.LEFT);
      JLabel five = new JLabel("5",SwingConstants.LEFT);
      go.addActionListener(this);
      pane.add(entr);
      pane.add(one);
      pane.add(ichi);
      pane.add(two);
      pane.add(ni);
      pane.add(three);
      pane.add(san);
      pane.add(four);
      pane.add(shi);
      pane.add(five);
      pane.add(go);
      JPanel draw = new JPanel();
      draw.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
      draw.setPreferredSize(new Dimension(300,300));
      pane.add(draw);
      return pane;
   public void actionPerformed(ActionEvent e) {
      String[] strs = new String[5];
      strs[0] = ichi.getText();
      strs[1] = ni.getText();
      strs[2] = san.getText();
      strs[3] = shi.getText();
      strs[4] = go.getText();
      double max=0;
      for (int x=0;x<5;x++) {
         if (numbs[x] > max){
            max = numbs[x];
      double mult = 100/max;
      for (int x=0;x<5;x++) {
         numbs[x] *= mult;
      contents.repaint();
      System.out.println("here");
   class Chart extends JComponent{
      public void paintComponent(Graphics g) {
         System.out.println("blah");
         g.drawLine(10,10,100,200);
         g.drawLine(300,300,450,450);
         //g.drawLine(10,10,(int)numbs[0]+10,10);
}

Answer 1

Is bumping allowed? X.x