Can anyone point the errors made on my code?

Question

I want to write a java Applet that implements a Graphical User Interface(GUI) from the the AWT package(not SWING package) to display a Pie Chart. The program should read a string from the user, then determine and display a Pie Chart that represents the percentage of vowels(a,e,i,o,u), consonants and others lettres in that string.
This is just the interface design. I get an error where i set up the border for the TextArea, and I can only get the button and the TextArea to display is I add the "South" and "North" respectively, while the recganglt won't even show up. Why? Anyone?
import java.util.*;
import java.awt.*;
import java.awt.Graphics.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
public class PieChart extends Applet implements ActionListener
     private PieCanvas canvas;
     Button pro;
     Panel buttonPanel;
     Color back, colorV, colorC, colorO;
     String c1, c2, c3;
     public void init()
          String in =getParameter("background");
          c1 =getParameter("vowelColor");
          c2 =getParameter("consonantColor");
          c3 =getParameter("otherColor");
          back =Color.black;
          colorV = Color.red;
          colorC = Color.yellow;
          colorO = Color.green;
          if(in!=null)
          back =Color.decode(in);
          setLayout(new BorderLayout());
          setBackground(back);
          canvas =new PieCanvas();
          buttonPanel =new Panel();
          setLayout(new BorderLayout());
          pro =new Button("Process");
          buttonPanel.add(pro);
          pro.addActionListener(this);
          JTextArea textArea =new JTextArea("This is an editable JTextArea " + "that has been initialized with the setText method. " +
               "A text area is a \"plain\" text component, " +
               "which means that although it can display text " + "in any font, all of the text is in the same font.", 5, 40);
textArea.setFont(new Font("Serif", Font.ITALIC, 16));
          textArea.setLineWrap(true);
          textArea.setWrapStyleWord(true);
          JScrollPane areaScrollPane =new JScrollPane(textArea);
          areaScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
          areaScrollPane.setPreferredSize(new Dimension(10, 50));
          areaScrollPane.setBorder(new SoftBevelBorder(SoftBevelBorder.LOWERED));
          add("North", textArea);
          add("Center", canvas);
          add("South", buttonPanel);
     /*public void actionPerformed(ActionEvent event)
          if(event.getSource()==pro)
               canvas.repaint();
               canvas.shape="rect";
               canvas.shapename="A Rectangle...";
               canvas.shapecolor=c1;
class PieCanvas extends Canvas
     public String shape="";
     public String shapename="";
     public String shapecolor="";
     public final int MAX_WIDTH = 300;
     public void paint(Graphics g)
          g.drawRoundRect(70,10,70,50,20,7);
          /*int x, y;
          if(shape.equals("rect"))
               if(shapecolor!=null)
                    g.setColor(Color.decode(shapecolor));
               else
               g.setColor(Color.blue);
               g.drawRect(MAX_WIDTH/4, MAX_WIDTH/4, MAX_WIDTH/2, MAX_WIDTH/4);
               g.setColor(Color.white);
               g.drawString(shapename, MAX_WIDTH/4, MAX_WIDTH/8);*/
}

Answer 1

Okay, let's go through Error Identification for Dummies.
1. Compile the program. Does this produce error messages? If so, what are they?
2. Run the program. Does this throw exceptions? If so, what are they? Post the stack trace.
3. If it runs without exception, does it do what you want it to do? If not, what did you want and what did it do? Be precise.