Round to 2 decimal places

Question

Possible Duplicate    Round a double to 2 significant figures after decimal point       I have   mkm     amountdrug fluidvol  1000  60  infrate  ptwt     in my Java code  The code works fine but returns to several decimal places  How do I limit it to just 2 or 3

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Try   float number mkm        amountdrug fluidvol  1000f  60f  infrate  ptwt  1000f  int newNum    int  mkm  mkm   newNum 1000f     Will return 3 decimal places

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Multiply by 1000  round  and divide back by 1000   For basic Java   http   download oracle com javase tutorial getStarted index html and http   download oracle com javase tutorial java index html

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double formattedNumber   Double parseDouble new DecimalFormat         format unformattedNumber      worked for me

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Don t use doubles   You can lose some precision   Here s a general purpose function   public static double round double unrounded  int precision  int roundingMode        BigDecimal bd   new BigDecimal unrounded       BigDecimal rounded   bd setScale precision  roundingMode       return rounded doubleValue        You can call it with  round yourNumber  3  BigDecimal ROUND HALF UP      precision  being the number of decimal points you desire

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BigDecimal a   new BigDecimal  12345 0789     a   a divide new BigDecimal  1    2  BigDecimal ROUND HALF UP      Also check other rounding modes  System out println  a      a toPlainString       Returns 12345 08

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Just use Math round    double mkm       amountdrug fluidvol  1000f  60f  infrate  ptwt   mkm   double  Math round mkm 100   100

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Create a class called Round and try using the method round as Round round targetValue  roundToDecimalPlaces  in your code  public class Round            public static float round float targetValue  int roundToDecimalPlaces                 int valueInTwoDecimalPlaces    int   targetValue   Math pow 10  roundToDecimalPlaces                 return  float   valueInTwoDecimalPlaces   Math pow 10  roundToDecimalPlaces

[java] Round to 2 decimal places

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