How Java makes float retain 2 or more decimal places

Tag: Print Select Pre target indicates 0.12. Text Mat blank

Method 1:

float F = 34.232323;
BigDecimal B = new BigDecimal (f);
Float F1 = B.setscale (2, bigdecimal.round_half_up). Floatvalue ();
B.setscale (2, bigdecimal.round_half_up) indicates rounding, reserving two decimal places

  float ft   =  134.3435f;     int   Scale  =   2;   Set the number  of digits  int   roundingmode  =  4;   indicates rounding, you can choose other values, such as the tail, and so  on.  BigDecimal   bd  =   new  BigDecimal (double) ft);    BD   =  bd.setscale (scale,roundingmode);    FT   =  

Method 2:

Import Java.text.DecimalFormat;
String a = new DecimalFormat ("###,###,###.##"). Format (100.12345);

That

  float   Scale  =   34.236323;   DecimalFormat   fnum  =   new  DecimalFormat ("# #0. xx");    String   dd=Fnum.format (scale);      SYSTEM.OUT.PRINTLN (DD);  

Method 3: The simplest method

   float   A  =   123.2334f;        float  b   =  (float) (Math.Round (a*100))/100; (Here's 100 is the 2-bit decimal point, if you want to other bits, such as 4 bits, here two 100 is changed to 10000)

How Java makes float retain 2 or more decimal places