08-19-2012, 07:28 PM
In the video Making a game with Java part 3, i=I cant figure out why but its telling me "The field Component.y is not visible" here's my code:[code2=java]package levelEditor;
import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferStrategy;
public class LevelEditor
extends Canvas
implements KeyListener, Runnable, MouseListener{
private Object[][] grid = new Object[50][50];
private Graphics bufferGraphics = null;
private BufferStrategy bufferStrategy = null;
private boolean running;
private Thread thread;
public LevelEditor(Dimension size)
{
this.setPreferredSize(size);
this.addKeyListener(this);
this.thread = new Thread(this);
this.addMouseListener(this);
running = true;
}
public void paint(Graphics g)
{
if (bufferStrategy == null)
{
this.createBufferStrategy(2);
bufferStrategy = this.getBufferStrategy();
bufferGraphics = bufferStrategy.getDrawGraphics();
this.thread.start();
}
}
public void run() {
//THis is what runs when the level editor is running
while(running)
{
DoLogic();
Draw();
DrawBackBufferToScreen();
Thread.currentThread();
try
{
Thread.sleep(10);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
public void DoLogic()
{
}
public void Draw()
{
bufferGraphics = bufferStrategy.getDrawGraphics();
try
{
bufferGraphics.clearRect(0, 0, this.getSize().width, this.getSize().height);
for (int x = 0; x < grid.length; x++)
{
for (int y = 0; y < grid.length; y++);
{
Object o = grid[x][y]; //the problem line
if (o instanceof Block)
{
Block blockToDraw = (Block)o;
blockToDraw.draw(bufferGraphics);
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
bufferGraphics.dispose();
}
}
public void DrawBackBufferToScreen()
{
bufferStrategy.show();
Toolkit.getDefaultToolkit().sync();
}
@Override
public void mouseClicked(MouseEvent e) {
int mouseX = e.getX();
int mouseY = e.getY();
mouseX = (mouseX / 25);
mouseY = (mouseY / 25);
grid [mouseX][mouseY] = new Block(mouseX * 25, mouseY * 25);
}
public void keyPressed(KeyEvent arg0) {
}
public void keyReleased(KeyEvent arg0) {
}
public void keyTyped(KeyEvent arg0) {
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}[/code2]
This was about 1/2 way thru the video.
the nasty red text said this "Exception in thread "Thread-1" java.lang.Error: Unresolved compilation problem:
The field Component.y is not visible
at levelEditor.LevelEditor.Draw(LevelEditor.java:84)
at levelEditor.LevelEditor.run(LevelEditor.java:55)
at java.lang.Thread.run(Unknown Source)
'
import java.awt.Canvas;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferStrategy;
public class LevelEditor
extends Canvas
implements KeyListener, Runnable, MouseListener{
private Object[][] grid = new Object[50][50];
private Graphics bufferGraphics = null;
private BufferStrategy bufferStrategy = null;
private boolean running;
private Thread thread;
public LevelEditor(Dimension size)
{
this.setPreferredSize(size);
this.addKeyListener(this);
this.thread = new Thread(this);
this.addMouseListener(this);
running = true;
}
public void paint(Graphics g)
{
if (bufferStrategy == null)
{
this.createBufferStrategy(2);
bufferStrategy = this.getBufferStrategy();
bufferGraphics = bufferStrategy.getDrawGraphics();
this.thread.start();
}
}
public void run() {
//THis is what runs when the level editor is running
while(running)
{
DoLogic();
Draw();
DrawBackBufferToScreen();
Thread.currentThread();
try
{
Thread.sleep(10);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
public void DoLogic()
{
}
public void Draw()
{
bufferGraphics = bufferStrategy.getDrawGraphics();
try
{
bufferGraphics.clearRect(0, 0, this.getSize().width, this.getSize().height);
for (int x = 0; x < grid.length; x++)
{
for (int y = 0; y < grid.length; y++);
{
Object o = grid[x][y]; //the problem line
if (o instanceof Block)
{
Block blockToDraw = (Block)o;
blockToDraw.draw(bufferGraphics);
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
finally
{
bufferGraphics.dispose();
}
}
public void DrawBackBufferToScreen()
{
bufferStrategy.show();
Toolkit.getDefaultToolkit().sync();
}
@Override
public void mouseClicked(MouseEvent e) {
int mouseX = e.getX();
int mouseY = e.getY();
mouseX = (mouseX / 25);
mouseY = (mouseY / 25);
grid [mouseX][mouseY] = new Block(mouseX * 25, mouseY * 25);
}
public void keyPressed(KeyEvent arg0) {
}
public void keyReleased(KeyEvent arg0) {
}
public void keyTyped(KeyEvent arg0) {
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}[/code2]
This was about 1/2 way thru the video.
the nasty red text said this "Exception in thread "Thread-1" java.lang.Error: Unresolved compilation problem:
The field Component.y is not visible
at levelEditor.LevelEditor.Draw(LevelEditor.java:84)
at levelEditor.LevelEditor.run(LevelEditor.java:55)
at java.lang.Thread.run(Unknown Source)
'
at the end of your for opening, which effectively destroys the "y" variable, hence your error. Simply remove the semi-colon and you should be good!
hock: --><img src="{SMILIES_PATH}/icon_eek.gif" alt="
--><img src="{SMILIES_PATH}/icon_e_sad.gif" alt="
--><img src="{SMILIES_PATH}/icon_e_biggrin.gif" alt="