Hello.  I have made a program that draws a graph and such.  However,
when I try to Maximize or change the window size I get these...ummm...
artifacts? appearing.  It seems that some of my labels are being
reprinted with higher and higher Y-coordinates.

Is there a way to refresh everything or clear away the unwanted text?

A compileable example is below (Hopefully it's not to long...)

//
//    Draw a graph
//

import java.awt.event.*;
import java.awt.*;
import java.awt.geom.*;

class Ass3_1 extends Frame {
    class MyData {                      // data class

        int currentX = 10;
        int currentY = 10;
        boolean brokerFeeStat = false;

        int IBM[] = {28};

        public void setX(int in_X){
            currentX = in_X;
        }

        public void setY(int in_Y){
            currentY = in_Y;
        }

        public void setBrokerFee(boolean in_Fee){
            brokerFeeStat = in_Fee;
        }

        public int[] getIBM(int index){
            switch (index) {
                case 0:
                    return IBM;
            }
            return IBM;
        }

        public int getX() { return currentX; }
        public int getY() { return currentY; }
        public boolean getBrokerFee() { return brokerFeeStat; }

    }

    MyData theData = new MyData();      // data object
            //Draw Y-axis
            g.drawLine(150,70,150,200);
            //Draw X-axis
            g.drawLine(150,200,300,200);

            //Add a Y-axis label
            Label priceLabel = new Label("Purchase Price ($)"); //add a
label
            priceLabel.setBounds(15,135,105,20);
            thePanel.add(priceLabel);

            //Draw small lines
            int y = 180;
            for(int i = 0; i<=4;i++){
                g.drawLine(146,y,154,y);
                y-=20;
            }

            //Write numbers
            g.drawString("0",142,205);
            int num = 185;
            int myInt = 10;
            for(int i=0;i<=4;i++){
                g.drawString(Integer.toString(myInt),130,num);
                num-=20;
                myInt+=10;
            }

            //Add an X-axis label
            Label companyLabel = new Label("Company");  //add a label
            companyLabel.setBounds(200,245,60,20);
            thePanel.add(companyLabel);

            //Draw 3 small lines
            g.drawLine(175,195,175,205);
            g.drawLine(225,195,225,205);
            g.drawLine(275,195,275,205);

            //Draw company names
            g.drawString("IBM",166,220);
            g.drawString("Compaq",201,220);
            g.drawString("Dell",264,220);

            int base = 200;
            int IBMValues[] = theData.getIBM(0);

            //draw IBM graph
            g.fillRect(151,(base - (IBMValues[0]*2)),50,(IBMValues[0]*2));

            //Title
            g.drawString("Profit/Loss Calculator",165,50);
        }
    }

    MyPanel thePanel = new MyPanel();   //drawing object

    //Extend the MouseAdapter
    class MyPL extends MouseAdapter {
        public void mousePressed(MouseEvent e){
            theData.setX(e.getX());
            theData.setY(e.getY());
            thePanel.repaint();
        }
    }

    class MyBL implements ActionListener{
        public void actionPerformed(ActionEvent e) {
            System.out.println("The BrokerFee was: " +
theData.getBrokerFee());
            theData.setBrokerFee(!theData.getBrokerFee());
            System.out.println("the BrokerFee is now: " +
theData.getBrokerFee()+"\n");
        }
    }

    // here we set up the frame
    public void startup() {
        this.setTitle("Assignment 3_1 Frame");
        this.setSize(400,500);
        this.setLayout(null);  //align by hand
        thePanel.setBounds(0,0,400,500);
        this.add(thePanel);
        this.setVisible(true);
        this.addWindowListener(new ExitListener());

        MyPL myMAdapt = new MyPL();
        thePanel.addMouseListener(myMAdapt);

        //Create a button
        Button aButtonA = new Button("Toggle Broker Fee");
        aButtonA.setBounds(165,280,110,40);

        //Attach ActionListener to button
        MyBL myAction = new MyBL();
        aButtonA.addActionListener(myAction);

        //Add button to Panel
        thePanel.add(aButtonA);
    }
    class ExitListener extends WindowAdapter {
        public void windowClosing(WindowEvent event) {
            System.exit(0);
        }
    }
}   

// boot up class
class ABootUp3_1 {
    public static void main(String [] args) {
        Ass3_1 theFrame = new Ass3_1();
    theFrame.startup();   
    }   
}