import uwcse.io.*;
import java.awt.Color;
import uwcse.graphics.*;

/**
 * Illustrating the use of arrays
 */

public class Arrays {

	public void useAnArray()
	{
		// An array of primitives
		boolean[] flags=new boolean[3];
		flags[0]=true;
		flags[2]=foo();//foo returns a boolean
		System.out.println("flags[1]="+flags[1]); // Boolean Array elements default to false
		if (flags[0])
			System.out.println("flags[0] is true");

		// An array of colors
		Input input = new Input();
		int n = input.readInt("number of colors: ");
		Color[] colors = new Color[n];
		for(int i=0; i<colors.length; i++)
			colors[i] = new Color((float)Math.random(),
			                   (float)Math.random(),
							   (float)Math.random());

		// Display them in a GWindow
		GWindow window = new GWindow();
		window.setExitOnClose();
		int x = 0;
		int width = window.getWindowWidth();
		int y = 0;
		int height = window.getWindowHeight()/n;
		for(int i=0; i<colors.length; i++){
			window.add(new Rectangle(x,y,width,height,colors[i],true));
			y+=height;
		}
		window.doRepaint();
	}

	private boolean foo()
	{
		// Return a random boolean
		return Math.random()>=0.5;
	}
}