Simple Error Correction?

Question

I am currently doing a very beginner Java programming project where I have drawn a penguin using two ovals and three triangles. I am now attempting to make the penguin move from left to right across the screen. The code that I am posting I feel should get the job done however I am receiving an <identifier> expected error for line 112
here is the line:
th.start();
I have searched for a solution to this and I realize it is a very standard and typical error. If anyone could help me through this it would be much appreciated as this is basically the last piece to my assignment. Thanks a lot.
import java.awt.*;
import java.applet.*;
public class Part5 implements runnable {
  private Location loc1;
  private Location loc2;
  private int ovalheight1;
  private int ovalwidth1;
  private Oval oval1;
  private Color colorblack;
  private Location offset;
  private Location loc3;
  private Location loc4;
  private int ovalheight2;
  private int ovalwidth2;
  private Oval oval2;
  private Color colorwhite;
  private Location offset1;
  private Location location;
  private Triangle triangle;
  private Location corner1;
  private Location corner2;
  private Location corner3;
  private Color colororange;
  private Location offset2;
  private Triangle triangle2;
  private Location offset3;
  private Triangle triangle3;
  private Location offset4;
  /* Initialize variables for the ovals */
  public void init() {
    //ovalblack
    loc1 = new Location(20, 0);   
    loc2 = new Location(50, 20);
    ovalheight1 = 250;
    ovalwidth1 = 350;
    colorblack = new Color(0, 0, 0);
    oval1 = new Oval(loc1, loc2, ovalheight1, ovalwidth1, colorblack);
    offset = new Location (50, 20);
    oval1.changeLocation (offset);
    //ovalwhite
    loc3 = new Location(80, 75);   
    loc4 = new Location(60, 40);
    ovalheight2 = 165;
    ovalwidth2 = 255;
    colorwhite = new Color(255, 255, 255);
    oval2 = new Oval(loc3, loc4, ovalheight2, ovalwidth2, colorwhite);
    offset1 = new Location (50, 42);
    oval2.changeLocation (offset1);
    //beak
    location = new Location (10,20);
    colororange = new Color (255, 128, 0);
    corner1 = new Location(0, 290);
    corner2 = new Location(100, 312);
    corner3 = new Location(0, 325);
    triangle = new Triangle(corner1, corner2,
    corner3, location, colororange);
    offset2 = new Location (220, -220);
    triangle.changeCorners (offset2);
    //left foot
    location = new Location (150, -225);
    colororange = new Color (255, 128, 0);
    corner1 = new Location(10, 275);
    corner2 = new Location(50, 318);
    corner3 = new Location(-5, 325);
    triangle2 = new Triangle(corner1, corner2,
    corner3, location, colororange);
    offset3 = new Location (265, 35);
    triangle2.changeCorners (offset3);
    //right foot
    location = new Location (200, 10);
    colororange = new Color (255, 128, 0);
    corner1 = new Location(10, 275);
    corner2 = new Location(50, 318);
    corner3 = new Location(-5, 325);
    triangle3 = new Triangle(corner1, corner2,
    corner3, location, colororange);
    offset4 = new Location (155, 60);
    triangle3.changeCorners (offset4);
  public void start() {
  Thread th = new Thread (this);
  th.start();
  public void stop() {
  public void destroy() {
  public void run(){
  int index = 1;
  while (true) {
  repaint ();
  offset = new Location (50+index, 20);
  offset1 = new Location (50+index, 42);
  offset2 = new Location (220+index, -220);
  offset3 = new Location (265+index, 35);
  offset4 = new Location (155+index, 60);
  oval1.changeLocation (offset);
  oval2.changeLocation (offset1);
  triangle.changeCorners (offset2);
  triangle2.changeCorners (offset3);
  triangle3.changeCorners (offset4);
  repaint ();
  index++;
  try
  Thread.sleep(20);
  catch (InteruptedException ex)
  /* Paint the oval */
  public void paint(Graphics g) {
    oval1.paint(g);
    oval2.paint(g);
    triangle.paint(g);
    triangle2.paint(g);
    triangle3.paint(g);
}

Answer 1

public class Part5 implements runnable {should be:
public class Part5 implements Runnable // capitalization matters{You probably should add a constructor, and much of what is in the init method can go in the constructor.
Your code confuses me a bit. It looks as if you are setting locations within your init method, and also trying to move the drawn items via the changeLocation method. I don't have many of your objects to look at, so I can't tell if this suspicion is correct. If you are throwing in some movement code here, I advise you not to do this.
This code here:
  Thread th = new Thread (this);
  th.start();
  }should probably look like so:
  new Thread(new Part5()).start();and shouldn't even be in this class. This would be a way to initialize your object and start the animation from another class, say a class called TestPart5 that has a static main method. For this to work this way, you have to initialize the Part5 class object within a constructor as noted above. Otherwise if you keep things as they are, you'd have to do something like so:
  Part5 p5 = new Part5();
  p5.init(); // have to call init since constructor doesn't fully initialize the object
  new Thread(p5).start();Looks like you have some reading and studying to do. Come back if you have questions.
P