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Thread: Static Method Help

  1. #1
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    Default Static Method Help

    I'm trying to use a static method to find out how many years it takes to double an arbitrary amount of money so I used a dummy amount of money. The problem is, the code compiles but the code does not run properly. What am I doing wrong?
    class YearsToDouble
    {
       public static void main ( String [] args ) throws Exception
       {
          System.out.println("rate(percent)   years to double");
          for ( int percent : new int[] {1,2,3,4,6,9,12,24} ) line(percent);
       }
       public static void line ( int percent )
       {
          System.out.printf("%7d%17d\n",percent,yearsToDouble(percent));
       }
       public static int yearsToDouble ( int percent )
       {
          double balance = 1.00;
          int years = 0;
          while ( balance < 2.00)
          {
             balance += ((percent/100)*balance);
             years++;
          }
          return years;
       }
    }


  2. #2
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    Default Re: Static Method Help

    while ( balance < 2.00)
          {
             balance += ((percent/100)*balance);
             years++;
          }

    That's an infinite loop.
    1 / 100, 24 / 100, calculated as Integers equate to 0.

    So you're always saying, 0 * balance, which of course equals zero, hence infinite loop
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

  3. The Following User Says Thank You to newbie For This Useful Post:

    mysticCHEEZE (October 9th, 2011)

  4. #3
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    Default Re: Static Method Help

    Now I get it Thanks!

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