import java.util.Random;
import java.awt.Color;
import java.awt.Point;

public class DemoRandom {
	
	public static void main(String[] args ) {
		
		String[] list1 = { "A", "B", "C", "D", "E" };
		
		Point[]  list2 = { new Point(0, 0), new Point(1, 1) };
		
		Color[]  list3 = { Color.RED, Color.GREEN };
		
		Object[] list4 = { new Point(1, 1), "E", Color.BLACK };
		
		System.out.println ( "list1 = " + toText( list1 ) + "\n" );
		System.out.println ( "list2 = " + toText( list2 ) + "\n" );
		System.out.println ( "list3 = " + toText( list3 ) + "\n" );
		System.out.println ( "list4 = " + toText( list4 ) + "\n" );
		
		randomize( list1 );
		randomize( list2 );
		randomize( list3 );
		randomize( list4 );
		
		System.out.println ( "list1 = " + toText( list1 ) + "\n" );
		System.out.println ( "list2 = " + toText( list2 ) + "\n" );
		System.out.println ( "list3 = " + toText( list3 ) + "\n" );
		System.out.println ( "list4 = " + toText( list4 ) + "\n" );
	}
	
	public static String toText(Object[] list) {
		String result = "[ ";
		
		for (int i = 0; i < list.length; ++i) {
			result = result + list[i] + " ";
		}
		 
		result = result + "]";
		
		return result;
	}
	
	public static void randomize(Object[] list) {
		Random variate = new Random();
		
		int n = list.length;
		
		for (int i = 0; i < n; ++i) {
			int offset = variate.nextInt(n-i);
			Object rmbr = list[i];
			list[i] = list[i + offset];
			list[i + offset] = rmbr;
		}
	}
	
}