How to convert float to int with Java

Question

I used the following line to convert float to int  but it s not as accurate as I d like    float a 8 61f   int b    b  int a    The result is   8  It should be 9   When a   -7 65f  the result is   -7  It should be -8   What s the best way to do it

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Math round value  round the value to the nearest whole number   Use   1  b  int  Math round a     2  a Math round a        b  int a

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If you want to convert a float value into an integer value  you have several ways to do it that depends on how do you want to round the float value  First way is floor rounding the float value  float myFloat   3 14f  int myInteger    int myFloat   The output of this code will be 3  even if the myFloat value is closer to 4  The second way is ceil rounding the float value  float myFloat   3 14f  int myInteger   Math ceil myFloat    The output of this code will be 4  because the rounding mode is always looking for the highest value

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Actually  there are different ways to downcast float to int  depending on the result you want to achieve   for int i  float f    round  the closest integer to given float   i   Math round f     f    2 0 - gt  i    2   f    2 22 - gt  i    2   f    2 68 - gt  i    3   f   -2 0 - gt  i   -2   f   -2 22 - gt  i   -2   f   -2 68 - gt  i   -3   note  this is  by contract  equal to  int  Math floor f   0 5f  truncate  i e  drop everything after the decimal dot   i    int  f    f    2 0 - gt  i    2   f    2 22 - gt  i    2   f    2 68 - gt  i    2   f   -2 0 - gt  i   -2   f   -2 22 - gt  i   -2   f   -2 68 - gt  i   -2  ceil floor  an integer always bigger smaller than a given value if it has any fractional part   i    int  Math ceil f     f    2 0 - gt  i    2   f    2 22 - gt  i    3   f    2 68 - gt  i    3   f   -2 0 - gt  i   -2   f   -2 22 - gt  i   -2   f   -2 68 - gt  i   -2  i    int  Math floor f     f    2 0 - gt  i    2   f    2 22 - gt  i    2   f    2 68 - gt  i    2   f   -2 0 - gt  i   -2   f   -2 22 - gt  i   -3   f   -2 68 - gt  i   -3    For rounding positive values  you can also just use  int  f   0 5   which works exactly as Math Round in those cases  as per doc    You can also use Math rint f  to do the rounding to the nearest even integer  it s arguably useful if you expect to deal with a lot of floats with fractional part strictly equal to   5  note the possible IEEE rounding issues   and want to keep the average of the set in place  you ll introduce another bias  where even numbers will be more common than odd  though   See  http   mindprod com jgloss round html  http   docs oracle com javase 6 docs api java lang Math html  for more information and some examples

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Math round also returns an integer value  so you don t need to typecast   int b   Math round float a

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As to me  easier   int   a   5       a is a Float  Return rounded value   Not dependent on Java Math round   types

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Using Math round   will round the float to the nearest integer

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Use Math round value  then after type cast it to integer   float a   8 61f  int b    int Math round a

[java] How to convert float to int with Java

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