CS161_Lab1 ASCII Initials

initials.java

// * * * * * * * * * * * * * * * * * * * * * * * * * * *
//	Name: Levi Willmeth		Folder Name: 	willmeth_l
//	CS161 Winter 2014		Assignment:	Lab 1
//	Class time: Mon/Wed/Fri 12:00pm - 1:20 / 1:50
//	Program Name: initials.class
//	Program Description:
//	Prints my initials 'LJW' in big asci text.
// * * * * * * * * * * * * * * * * * * * * * * * * * * *
import java.util.*; // required for Collections.shuffle
public class initials{	// initial class must be same as filename
	// revealString method slowly reveals each line
	public static void revealString(String raw_str){
		// Convert raw_str to list of individual characters
		char[] char_list = raw_str.toCharArray();
		// visible_str holds the mix of garbage and real letters
		StringBuilder visible_str = new StringBuilder();
		// Prepare random numbers for visible_str
		Random garbage_number = new Random();
		// Create a list of keys to use while replacing visible_str
		List<Integer> keys = new ArrayList<Integer>();
		for ( int k = 0; k < char_list.length; k++ ){
			// each key is the index of a visible_str character
			keys.add(k);
			// fill visible_str with garbage 1s and 0s
			visible_str.append(garbage_number.nextInt(2));
		}
		// Shuffle the keys, randomizing reveal order
		Collections.shuffle(keys);
		// Iterate over keys, swapping a visible_char for its
		// real character using the index number in char_list.
		for (int key : keys){
			/* Couldnt find a better way to delay the script,
			using Thread.sleep(time in ms); delays the entire thread
			and is very inefficient. Also, it must be used in a 
			try / except catch because Java throws an
			InterruptedException for the thread. */
			try{
				Thread.sleep(10);
			} catch (Exception e){
				// ignore errors
			}
			// Replace one character in visible_str each loop
			visible_str.setCharAt(key,char_list[key]);
			// Write over previous output each loop until finished.
			System.out.print("\r"+visible_str);
		}
		// Used for debugging:
		//System.out.println(visible_str);
		//System.out.println(keys);
		System.out.println();
	} // end revealString Method
	public static void main(String []args){
		revealString("LLLL         JJJJJJJJJJJJJJJ WWWWWW                     WWWWWW");
		revealString("LLLL         JJJJJJJJJJJJJJJ  WWWW                       WWWW ");
		revealString("LLLL                 JJJJ      WWWW                     WWWW  ");
		revealString("LLLL                 JJJJ       WWWW                   WWWW   ");
		revealString("LLLL                 JJJJ        WWWW       WWW       WWWW    ");
		revealString("LLLL                 JJJJ         WWWW     WWWWW     WWWW     ");
		revealString("LLLL          JJJ    JJJJ          WWWW   WWW WWW   WWWW      ");
		revealString("LLLL          JJJJ   JJJJ           WWWW WWW   WWW WWWW       ");
		revealString("LLLLLLLLLLLL   JJJJJJJJJJ            WWWWWW     WWWWWW        ");
		revealString("LLLLLLLLLLLL    JJJJJJJJ              WWWW       WWWW         ");
		System.out.println();
	}
}