My picture is out of bounds?

[ThatPinkSock]

import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.text.*;
import java.util.*;
import java.util.List; // resolves problem with java.awt.List and java.util.List

public class Picture extends SimplePicture
{


public static void main(String[] args)
{

String fileName = FileChooser.pickAFile();
Picture pictObj = new Picture(fileName);
pictObj.makeGrid(2);
pictObj.show();

}


public Picture makeGrid(int size)
{
Picture pictObj = new Picture(this.getHeight()*size, this.getWidth()*size);
//declares both the source pixel and target pixel and sets it to null
Pixel sourcePixel = null;
Pixel targetPixel = null;
int targetX = 0;
int targetY = 0;
//loops through the source picture columns
for (int sourceX = 0; sourceX < pictObj.getWidth(); sourceX++)
{
//loops through the source picture rows
for (int sourceY = 0; sourceY < pictObj.getHeight(); sourceY++)
{
//set sourcepixel = correct pixel
sourcePixel = this.getPixel(sourceX,sourceY);
//gets the 3 colors
for (int indexX = 0; indexX < size; indexX++)
{
for (int indexY = 0; indexY < size; indexY++)
{


targetX = (sourceX * size);
targetY = (sourceY * size);
targetPixel = pictObj.getPixel(targetX,targetY);
//set pixel = correct pixel
int red = targetPixel.getRed();
int green = targetPixel.getGreen();
int blue = targetPixel.getBlue();

//{//if row is even
if (sourceY%2==1 ) {
// negates the colors


targetPixel.setColor(new Color(255 - red, 255 - green, 255
- blue));
//gets the source and target pixels
}
else targetPixel.setColor(sourcePixel.getColor());

//}

}
}
}
}

return pictObj;
}

}


Someone else was on these forums with this code and I was curious to see if anyone figured out the problem. I was working on it for a few hours and I couldn't figure it out. This error always comes up:

java.lang.ArrayIndexOutOfBoundsException: Coordinate out of bounds!
at sun.awt.image.IntegerInterleavedRaster.getDataElem ents(Unknown Source)
at java.awt.image.BufferedImage.getRGB(Unknown Source)
at SimplePicture.getBasicPixel(SimplePicture.java:300 )
at Pixel.getRed(Pixel.java:94)
at Picture.makeGrid(Picture.java:180)
at Picture.main(Picture.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un known Source)
at java.lang.reflect.Method.invoke(Unknown Source)

[ThatPinkSock]

now I'm having trouble applying the method to the picture. When I run the program I want the picture to be in a grid and have every other row negated.

public class Picture extends SimplePicture
{


public static void main(String[] args)
{

String fileName = FileChooser.pickAFile();
Picture pictObj = new Picture(fileName);
pictObj.makeGrid(3);
pictObj.show();

}


public Picture makeGrid(int size)
{
Picture pictObj = new Picture(this.getWidth()*size,
this.getHeight()*size);
//declares both the source pixel and target pixel and sets it to null
Pixel sourcePixel = null;
Pixel targetPixel = null;
int targetX = 0;
int targetY = 0;
//loops through the source picture columns
for (int sourceX = 0; sourceX < this.getWidth(); sourceX++)
{
//loops through the source picture rows
for (int sourceY = 0; sourceY < this.getHeight(); sourceY++)
{
//set sourcepixel = correct pixel
sourcePixel = this.getPixel(sourceX,sourceY);
//gets the 3 colors
for (int indexX = 0; indexX < size; indexX++)
{
for (int indexY = 0; indexY < size; indexY++)
{


targetX = sourceX + this.getWidth() * indexX;
targetY = sourceY + this.getHeight()* indexY;
//System.out.println(" target pixel "+ targetX + " "+ targetY);
targetPixel = pictObj.getPixel(targetX,targetY);
//set pixel = correct pixel
int red = sourcePixel.getRed();
int green = sourcePixel.getGreen();
int blue = sourcePixel.getBlue();

//if row is even
if (sourceY%2==1 ) {
// negates the colors


targetPixel.setColor(new Color(255 - red, 255 - green, 255- blue));
//gets the source and target pixels
}
else targetPixel.setColor(sourcePixel.getColor());



}
}
}
}
return pictObj;
}

}

Help! When I run it - the untouched picture appears.

[Gpcompscinoob]

hey im working on the same assignment and im stuck with the same problem as you did you figure out what you were doing wrong?

[ThatPinkSock]

{
String fileName = FileChooser.pickAFile();
Picture origPicture = new Picture(fileName);
Picture scaledPicture = origPicture.makeGrid();
scaledPicture.show();

}

public Picture makeGrid(int size)
{
Picture pictObj = new Picture(this.getWidth()*size,
this.getHeight()*size);
Pixel sourcePixel = null;
Pixel targetPixel = null;
int targetX = 0;
int targetY = 0;
for (int sourceX = 0; sourceX < this.getWidth(); sourceX++)
{
for (int sourceY = 0; sourceY < this.getHeight(); sourceY++)
{
sourcePixel = this.getPixel(sourceX,sourceY);
for (int indexX = 0; indexX < size; indexX++)
{
for (int indexY = 0; indexY < size; indexY++)
{
targetX = sourceX + this.getWidth() * indexX;
targetY = sourceY + this.getHeight()* indexY;
targetPixel = pictObj.getPixel(targetX,targetY);
int red = sourcePixel.getRed();
int green = sourcePixel.getGreen();
int blue = sourcePixel.getBlue();
if (indexY%2==1 ) {
targetPixel.setColor(new Color(255 - red, 255 - green, 255
- blue));
}
else
targetPixel.setColor(sourcePixel.getColor());
}
}
}
}
return pictObj;
}