So Lost

[kandt]

I'm writing code straight from a book, so that after it's all done I can go in and try and understand how it works and change it to suit my purposes, but for some reason the code doesn't work and I have no idea why.

Here's the code:

import java.awt.*;

class GraphicsDisp
{

GraphicsEnvironment gfxEnv = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice defaultDevice = gfxEnv.getDefaultScreenDevice();
DisplayMode[] displayModes = defaultDevice.getDisplayModes();
DisplayMode[] requestedDisplayModes = new DisplayMode[]
{
new DisplayMode(1280, 1024, 32, DisplayMode.REFRESH_RATE_UNKNOWN),
new DisplayMode(1024, 768, 32, DisplayMode.REFRESH_RATE_UNKNOWN),
new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN),
new DisplayMode(640, 480, 16, DisplayMode.REFRESH_RATE_UNKNOWN)
};

public static DisplayMode findRequestedMode()
{
DisplayMode best = null;
//loop through all requested modes
for (int rIndex = 0; rIndex #### requestedDisplayModes.length; rIndex++)
{
for (int mIndex = 0; mIndex #### displayModes.length; mIndex++)
{
if(displayModes[mIndex].getWidth() ==
requestedDisplayModes[rIndex].getWidth()
&&
displayModes[mIndex].getHeight()
== requestedDisplayModes[rIndex].getHeight()
&&
displayModes[mIndex].getBitDepth() ==
requestedDisplayModes[rIndex].getBitDepth()){
//found a match
if(best == null)
{
//if refresh rate was spec'd try to match that as well
if (requestedDisplayModes[rIndex].getRefreshRate() !=
DisplayMode.REFRESH_RATE_UNKNOWN)
{
if (displayModes[mIndex].getRefreshRate() $$$$=
requestedDisplayModes[rIndex].getRefreshRate())
{
best = displayModes[mIndex];
return best;
}
}
else
{
best = displayModes[mIndex];
return best;
}
}
}
}
}
//no matching mode so return null
return best;
}



}

I get errors for "; expected", ") expected", "not a statement" and "illegal character \35" everywhere a # sign is. I know that the # is associated with \35, but I don't know why it's illegal. Do I need to replace the ####'s with the resolutions listed in above the findRequestedMode() Method? Why do I need to add ';'s and a ')'? I can't find anything wrong with this code.

[roots]

#### and $$$$$ are not operator .. and you are using them as some sort of comparison operator.

Is this the one you are looking for ??

import java.awt.DisplayMode;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

class GraphicsDisp{

	static GraphicsEnvironment	gfxEnv					= GraphicsEnvironment.getLocalGraphicsEnvironment();
	static GraphicsDevice		defaultDevice			= gfxEnv.getDefaultScreenDevice();
	static DisplayMode[]		displayModes			= defaultDevice.getDisplayModes();
	static DisplayMode[]		requestedDisplayModes	= new DisplayMode[] { new DisplayMode(1280, 1024, 32, DisplayMode.REFRESH_RATE_UNKNOWN), new DisplayMode(1024, 768, 32, DisplayMode.REFRESH_RATE_UNKNOWN), new DisplayMode(800, 600, 16, DisplayMode.REFRESH_RATE_UNKNOWN),
			new DisplayMode(640, 480, 16, DisplayMode.REFRESH_RATE_UNKNOWN) };

	public static DisplayMode findRequestedMode() {
		DisplayMode best = null;
		// loop through all requested modes
		for (int rIndex = 0; rIndex < requestedDisplayModes.length; rIndex++) {
			for (int mIndex = 0; mIndex < displayModes.length; mIndex++) {
				if (displayModes[mIndex].getWidth() == requestedDisplayModes[rIndex].getWidth() && displayModes[mIndex].getHeight() == requestedDisplayModes[rIndex].getHeight() && displayModes[mIndex].getBitDepth() == requestedDisplayModes[rIndex].getBitDepth()) {
					// found a match
					if (best == null) {
						// if refresh rate was spec'd try to match that as well
						if (requestedDisplayModes[rIndex].getRefreshRate() != DisplayMode.REFRESH_RATE_UNKNOWN) {
							if (displayModes[mIndex].getRefreshRate() >= requestedDisplayModes[rIndex].getRefreshRate()) {
								best = displayModes[mIndex];
								return best;
							}
						} else {
							best = displayModes[mIndex];
							return best;
						}
					}
				}
			}
		}
		// no matching mode so return null
		return best;
	}
}

[kandt]

thank you so much. idk why they would put that in a beginners book and not say anywhere preceding it that #### and $$$$ stand for operators. i've read it from front to the page with the code on it and there's no mention at all, lol. thanks.

[Fubarable]

You may be getting slightly ahead of yourself here with this project. Why not start learning the basics?

[fishtoprecords]

Yes, do the first example in the book, usually Hello World.
Work your way through the examples. It will only take a day or two and will save a lot of questions and confusion.

[Nicholas Jordan]

They put those things in books so you will have to keep buying books, my first program in Java does things the books will tell you cannot be done.

/**
 * We need a class which enables ######### to discuss matters of consequence
 * in the long term planning of our actions.  It is noted for the reader
 * that the casual intruder  will examine only the first and last few bytes
 * of a keystring when browsing for casual reasons.
 */

That's 570 lines in a manual text editor - no ide - just to have a core to build around,....