3 questions regarding alignment, rectangle drawing, and a error I get

Question

3 Questions:
========================================
1. Why does the DOS window in Code Warrior show this error in it, but it doesn't affect the operation of the applet?
Exception occurred during event dispatching:
java.lang.NullPointerException
at PianoApplet.paint(PianoApplet.java)
at sun.awt.RepaintArea.paint(RepaintArea.java:293)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:191)
at java.awt.Component.dispatchEventImpl(Component.java:2658)
at java.awt.Container.dispatchEventImpl(Container.java:1208)
at java.awt.Component.dispatchEvent(Component.java:2492)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:334)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:126)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:93)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:80)
Exception occurred during event dispatching:
java.lang.NullPointerException
at PianoApplet.paint(PianoApplet.java)
at java.awt.Container.update(Container.java:976)
at sun.awt.RepaintArea.update(RepaintArea.java:332)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:195)
at java.awt.Component.dispatchEventImpl(Component.java:2658)
at java.awt.Container.dispatchEventImpl(Container.java:1208)
at java.awt.Component.dispatchEvent(Component.java:2492)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:334)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:126)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:93)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:88)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:80)
===========================================
Second Question
How do I align this so that it is is on the right on the applet, cause it overlaps my keyboard when I just place it.
private TextArea intro = new TextArea("Welcome to the PianoApplet! \nHere you will be able to play a full sized octave of keys. \nClick a key to play the key. \nYou can also drag your mouse across the keyboard \nand play multiple notes at once.", 5, 40);
===========================================
Third Question
When I do this:
if(state.equals("duh")){
g.setColor(Color.green);
g.fillRect(150,50,40,90);
g.drawImage(iduh,100, 200, this);
It colors everything green, not just the duh key, it also colors the duh sharp, reh, and half the reh sharp. Why is that?
=========================================
Please answer any of my questions.
Thanks.
==========
My Code
==========
import java.awt.*;
import java.applet.Applet;
import javax.swing.*;
import java.awt.event.*;
import java.applet.AudioClip;
public class PianoApplet extends Applet implements MouseListener, MouseMotionListener {
private Point mouse = new Point();
//private TextField output=new TextField(30);
//private TextArea intro = new TextArea("Welcome to the PianoApplet! \nHere you will be able to play a full sized octave of keys. \nClick a key to play the key. \nYou can also drag your mouse across the keyboard \nand play multiple notes at once.", 5, 40);
private String state = null;
//The images
private Image iduh, ire, ime, ifa, isol, ila, isi, iduh2, iduhsharp, iemptynotes, ifasharp, ilasharp, iresharp, isolsharp;
//The sounds
AudioClip duh;
AudioClip re;
AudioClip me;
AudioClip fa;
AudioClip sol;
AudioClip la;
AudioClip si;
AudioClip duh2;
AudioClip b0;
AudioClip b1;
AudioClip b2;
AudioClip b3;
AudioClip b4;
public void init(){
//load images of notes here
iduh = getImage(getCodeBase(), "duh.jpg");
ire = getImage(getCodeBase(), "re.jpg");
ime = getImage(getCodeBase(), "me.jpg");
ifa = getImage(getCodeBase(), "fa.jpg");
isol = getImage(getCodeBase(), "sol.jpg");
ila = getImage(getCodeBase(), "la.jpg");
isi = getImage(getCodeBase(), "si.jpg");
iduh2 = getImage(getCodeBase(), "duh2.jpg");
iduhsharp = getImage(getCodeBase(), "duhsharp.jpg");
iemptynotes = getImage(getCodeBase(), "emptynotes.jpg");
ifasharp = getImage(getCodeBase(), "fasharp.jpg");
ilasharp = getImage(getCodeBase(), "lasharp.jpg");
iresharp = getImage(getCodeBase(), "resharp.jpg");
isolsharp = getImage(getCodeBase(), "solsharp.jpg");
//load sounds of piano here
duh = getAudioClip(getCodeBase(),"duh.au");
re = getAudioClip(getCodeBase(),"re.au");
me = getAudioClip(getCodeBase(),"me.au");
fa = getAudioClip(getCodeBase(),"fa.au");
sol = getAudioClip(getCodeBase(),"sol.au");
la = getAudioClip(getCodeBase(),"la.au");
si = getAudioClip(getCodeBase(),"si.au");
duh2 = getAudioClip(getCodeBase(),"duh2.au");
b0 = getAudioClip(getCodeBase(),"b0.au");
b1 = getAudioClip(getCodeBase(),"b1.au");
b2 = getAudioClip(getCodeBase(),"b2.au");
b3 = getAudioClip(getCodeBase(),"b3.au");
b4 = getAudioClip(getCodeBase(),"b4.au");
addMouseListener(this);
addMouseMotionListener(this);
//add(output);
setSize(750,300);
//add(intro);
public void paint(Graphics g) {
g.setColor(Color.black);
g.drawRect(150,50,40,90); g.fillRect(165,50,12,60);
g.drawRect(170,50,40,90);
g.fillRect(185,50,12,60);
g.drawRect(190,50,40,90);
g.drawRect(210,50,40,90);
g.fillRect(225,50,12,60);
g.drawRect(230,50,40,90);
g.fillRect(245,50,12,60);
g.drawRect(250,50,40,90);
g.fillRect(265,50,12,60);
g.drawRect(270,50,40,90);
g.drawImage(iemptynotes,100, 200, this);
if(state.equals("duh")){
g.setColor(Color.green);
g.fillRect(150,50,40,90);
g.drawImage(iduh,100, 200, this);
if(state.equals("re")){
g.drawImage(ire,100, 200, this);
if(state.equals("me")){
g.drawImage(ime,100, 200, this);
if(state.equals("fa")){
g.drawImage(ifa,100, 200, this);
if(state.equals("sol")){
g.drawImage(isol,100, 200, this);
if(state.equals("la")){
g.drawImage(ila,100, 200, this);
if(state.equals("si")){
g.drawImage(isi,100, 200, this);
if(state.equals("duh2")){
g.drawImage(iduh2,100, 200, this);
if(state.equals("b0")){
g.drawImage(iduhsharp,100, 200, this);
if(state.equals("b2")){
g.drawImage(ifasharp,100, 200, this);
if(state.equals("b4")){
g.drawImage(ilasharp,100, 200, this);
if(state.equals("b1")){
g.drawImage(iresharp,100, 200, this);
if(state.equals("b3")){
g.drawImage(isolsharp,100, 200, this);
public void mouseClicked(MouseEvent e){
mouse = e.getPoint();
//output.setText("x: " + mouse.x + " y: " + mouse.y);
repaint();
if (((50<mouse.y && mouse.y<110) && (150<mouse.x && mouse.x<165)) || ((110<mouse.y && mouse.y<140) && (150<mouse.x && mouse.x<170)))
//setBackground(Color.green);
duh.play();
state = "duh";
repaint();
System.out.println("Duh");
else if (((50<mouse.y && mouse.y<110) && (165<mouse.x && mouse.x<175)))
b0.play();
state = "b0";
repaint();
System.out.println("b0");
else if (((50<mouse.y && mouse.y<110) && (175<mouse.x && mouse.x<185)) || ((110<mouse.y && mouse.y<140) && (170<mouse.x && mouse.x<190)))
re.play();
state = "re";
repaint();
System.out.println("reh");
else if (((50<mouse.y && mouse.y<110) && (185<mouse.x && mouse.x<195)))
b1.play();
state = "b1";
repaint();
System.out.println("b1");
else if (((50<mouse.y && mouse.y<110) && (195<mouse.x && mouse.x<210)) || ((110<mouse.y && mouse.y<140) && (190<mouse.x && mouse.x<210)))
me.play();
state = "me";
repaint();
System.out.println("me");
else if (((50<mouse.y && mouse.y<110) && (210<mouse.x && mouse.x<225)) || ((110<mouse.y && mouse.y<140) && (210<mouse.x && mouse.x<230)))
fa.play();
state = "fa";
repaint();
System.out.println("fa");
else if (((50<mouse.y && mouse.y<110) && (225<mouse.x && mouse.x<235)))
b2.play();
state = "b2";
repaint();
System.out.println("b2");
else if (((50<mouse.y && mouse.y<110) && (235<mouse.x && mouse.x<245)) || ((110<mouse.y && mouse.y<140) && (235<mouse.x && mouse.x<250)))
sol.play();
state = "sol";
repaint();
System.out.println("sol");
else if (((50<mouse.y && mouse.y<110) && (245<mouse.x && mouse.x<255)))
b3.play();
state = "b3";
repaint();
System.out.println("b3");
else if (((50<mouse.y && mouse.y<110) && (255<mouse.x && mouse.x<265)) || ((110<mouse.y && mouse.y<140) && (255<mouse.x && mouse.x<270)))
la.play();
state = "la";
repaint();
System.out.println("la");
else if (((50<mouse.y && mouse.y<110) && (265<mouse.x && mouse.x<275)))
b4.play();
state = "b4";
repaint();
System.out.println("b4");
else if (((50<mouse.y && mouse.y<110) && (275<mouse.x && mouse.x<290)) || ((110<mouse.y && mouse.y<140) && (270<mouse.x && mouse.x<290)))
si.play();
state = "si";
repaint();
System.out.println("si");
else if (((50<mouse.y && mouse.y<140) && (290<mouse.x && mouse.x<310)))
duh2.play();
state = "duh2";
repaint();
System.out.println("duh");
public void mouseDragged(MouseEvent e) {
//output.setText("x: " + mouse.x + " y: " + mouse.y);
mouse = e.getPoint();
repaint();
if (((50<mouse.y && mouse.y<110) && (150<mouse.x && mouse.x<165)) || ((110<mouse.y && mouse.y<140) && (150<mouse.x && mouse.x<170)))
//setBackground(Color.green);
duh.play();
state = "duh";
repaint();
System.out.println("Duh");
else if (((50<mouse.y && mouse.y<110) && (165<mouse.x && mouse.x<175)))
b0.play();
state = "b0";
repaint();
System.out.println("b0");
else if (((50<mouse.y && mouse.y<110) && (175<mouse.x && mouse.x<185)) || ((110<mouse.y && mouse.y<140) && (170<mouse.x && mouse.x<190)))
re.play();
state = "re";
repaint();
System.out.println("reh");
else if (((50<mouse.y && mouse.y<110) && (185<mouse.x && mouse.x<195)))
b1.play();
state = "b1";
repaint();
System.out.println("b1");
else if (((50<mouse.y && mouse.y<110) && (195<mouse.x && mouse.x<210)) || ((110<mouse.y && mouse.y<140) && (190<mouse.x && mouse.x<210)))
me.play();
state = "me";
repaint();
System.out.println("me");
else if (((50<mouse.y && mouse.y<110) && (210<mouse.x && mouse.x<225)) || ((110<mouse.y && mouse.y<140) && (210<mouse.x && mouse.x<230)))
fa.play();
state = "fa";
repaint();
System.out.println("fa");
else if (((50<mouse.y && mouse.y<110) && (225<mouse.x && mouse.x<235)))
b2.play();
state = "b2";
repaint();
System.out.println("b2");
else if (((50<mouse.y && mouse.y<110) && (235<mouse.x && mouse.x<245)) || ((110<mouse.y && mouse.y<140) && (235<mouse.x && mouse.x<250)))
sol.play();
state = "sol";
repaint();
System.out.println("sol");
else if (((50<mouse.y && mouse.y<110) && (245<mouse.x && mouse.x<255)))
b3.play();
state = "b3";
repaint();
System.out.println("b3");
else if (((50<mouse.y && mouse.y<110) && (255<mouse.x && mouse.x<265)) || ((110<mouse.y && mouse.y<140) && (255<mouse.x && mouse.x<270)))
la.play();
state = "la";
repaint();
System.out.println("la");
else if (((50<mouse.y && mouse.y<110) && (265<mouse.x && mouse.x<275)))
b4.play();
state = "b4";
repaint();
System.out.println("b4");
else if (((50<mouse.y && mouse.y<110) && (275<mouse.x && mouse.x<290)) || ((110<mouse.y && mouse.y<140) && (270<mouse.x && mouse.x<290)))
si.play();
state = "si";
repaint();
System.out.println("si");
else if (((50<mouse.y && mouse.y<140) && (290<mouse.x && mouse.x<310)))
duh2.play();
state = "duh2";
repaint();
System.out.println("duh");
public void mouseEntered(MouseEvent e){ }
public void mouseExited(MouseEvent e){ }
public void mousePressed(MouseEvent e){ }
public void mouseReleased(MouseEvent e){ }
public void mouseMoved(MouseEvent e){ }
}

Answer 1

question 2:
BFI answer:
put everything you have in a panel
put your text area beside it.
question 1:
something about painting a .java file just seems wrong.
question 3:
because you told it to.