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Thread: no ending after decimal point.

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    Default no ending after decimal point.

    How do i get my program to keep going until the end is reach of a number? For example 22/7 = pie. How do i get the program to keep giving numbers after pie instead of stoping after 9 or 10 decimal places?


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    Default Re: no ending after decimal point.

    Look at using the BigDecimal class.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: no ending after decimal point.

    This is what i have so far:
     System.out.println((big.setScale(BigDecimal.ROUND_CEILING)));

    Problem is when i run it i get this error:
    Exception in thread "main" java.lang.ArithmeticException: Rounding necessary
    	at java.math.BigDecimal.divideAndRound(BigDecimal.java:1452)
    	at java.math.BigDecimal.setScale(BigDecimal.java:2406)
    	at java.math.BigDecimal.setScale(BigDecimal.java:2449)
    	at pie.Pie.main(Pie.java:27)
    Java Result: 1
    I thought ROUND_CEILING was supposed to get rid of needing to round?

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    Default Re: no ending after decimal point.

    Can you post a small complete program that compiles, executes and shows the error?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: no ending after decimal point.

    import java.lang.Math;
     import java.math.BigDecimal;
     import java.text.NumberFormat;
     import java.util.*;
    /**
     *
     * 
     */
    public class Pie {
     
        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) {
        double num = 22;
        double num2 = 7;
       double total = num/num2;
       BigDecimal big = new BigDecimal(total);
     
     
     
            System.out.println((big.setScale(BigDecimal.ROUND_CEILING)));    // TODO code application logic here
        }
    }

    thats what i have that is giving the error

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    Default Re: no ending after decimal point.

    big.setScale(BigDecimal.ROUND_CEILING)
    What do you expect that to do?

    ArithmeticException: Rounding necessary
    Have you set the rounding first?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: no ending after decimal point.

    I dont want it to round. I want the pie to continue forever until i shut down the program.

    I thought big.setscale(BigDecimal.ROUND_CIELING) would continue to count after the decimals with no set length.

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    Default Re: no ending after decimal point.

    Print out the value of BigDecimal.ROUND_CEILING to see its value.

    What happens when you leave the call to setScale() out?
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    Default Re: no ending after decimal point.

    the output = 2

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    Default Re: no ending after decimal point.

    Then the code was executing: setScale(2)
    Try calling setScale(9999) and see what happens.
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    Default Re: no ending after decimal point.

    It enters a lot of 0's. It does not continue answering the equation tho. Why is that?

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    Default Re: no ending after decimal point.

    It does not continue
    I don't know why the program stops executing.
    If you don't understand my answer, don't ignore it, ask a question.

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