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Thread: I'm confused...

  1. #1
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    Question I'm confused...

    I was writing a code on how to say a number but my code was horrible so I asked for help. A lot helped but this code caught my attention:

    import javax.swing.*;
    public class word {
     
    	private static final String[] simple= { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine",
    											"ten", "evelen", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen",
    											"eightteen", "nineteen" };
     
    	private static final String[] tens= { null, null, "twenty", "thirty", "fourty", "fifty", "sixty", "seventy", "eighty", "ninety" };
     
    	public static String say(int number) { 
    		return say(number, true); //default true
     
    	}
     
    	private static String say(int number, boolean sayZero) {
    		//simulate 123
    		if (number < 0)				return "negative "+say(-number, sayZero); //is 123 < 0? False
     
    		if (number == 0)			return sayZero?simple[number]:""; //is 123 < 0 ? False
     
    		if (number < 20) 			return simple[number];  //is 123 < 0? false
     
    		if (number < 100)			return tens[number/10]+say(number%10, false); //is 100 < 100? false
     
    		if (number < 1000) 			return say(number/100, false)+" hundred "+say(number%100); //is 100 < 1000? true--execute say(1) hundred   
     
    		if (number < 1000000) 		return say(number/1000, false)+" thousand"+say(number%1000, false);
     
    		if (number < 1000000000)	return say(number/1000000, false)+" million "+say(number%1000000, false);
     
    		return say(number/1000000000, false)+"billion "+say(number%1000000000, false);
    	}
     
    	public static void main(String[] args) {
     
    		String say = JOptionPane.showInputDialog("Enter a number");
    		int speak = Integer.parseInt(say);
    		JOptionPane.showMessageDialog(null,say(speak));
     
    	}
     
    }

    This code is 100% effective but confusing. So here are my questions:
    How does the say() method work?
    Why is it that it works even if its not on a loop?
    What is the role of boolean here?


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: I'm confused...

    Have you stepped through this with a debugger? That's going to help you understand much more effectively than somebody else explaining it will.

    What do you mean "how does it work"?
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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