Loss of precision – int -> float or double

by

In Java Integer uses 32 bits to represent its value.

In Java a FLOAT uses a 23 bit mantissa, so integers greater than 2^23 will have their least significant bits truncated. For example 33554435 (or 0x200003) will be truncated to around 33554432 +/- 4

In Java a DOUBLE uses a 52 bit mantissa, so will be able to represent a 32bit integer without lost of data.

See also “Floating Point” on wikipedia

More Related Contents:

  1. Retain precision with double in Java
  2. Why converting from float to double changes the value?
  3. Why does adding 0.1 multiple times remain lossless?
  4. How to nicely format floating numbers to string without unnecessary decimal 0’s
  5. Double vs. BigDecimal?
  6. Float and double datatype in Java
  7. Convert float to double without losing precision
  8. Why does Math.round(0.49999999999999994) return 1?
  9. Java:Why should we use BigDecimal instead of Double in the real world? [duplicate]
  10. Double calculation producing odd result [duplicate]
  11. How can I handle precision error with float in Java?
  12. What do F and D mean at the end of numeric literals?
  13. What is the inclusive range of float and double in Java?
  14. Java double precision sum trouble
  15. Why can’t we use ‘==’ to compare two float or double numbers [duplicate]
  16. Java: Inaccuracy using double [duplicate]
  17. Type mismatch: cannot convert from double to double[]
  18. Round a double to 2 decimal places [duplicate]
  19. Floating point arithmetic not producing exact results [duplicate]
  20. How to convert float to int with Java
  21. Why is Double.MIN_VALUE in not negative
  22. How do I round a double to two decimal places in Java? [duplicate]
  23. Rounding a double to turn it into an int (java)
  24. Java BigDecimal trigonometric methods
  25. How to get the decimal part of a float?
  26. Why is Java’s Double.compare(double, double) implemented the way it is?
  27. Java – format double value as dollar amount
  28. Adding and subtracting doubles are giving strange results [duplicate]
  29. How can I convert integer into float in Java?
  30. Modulus with doubles in Java

Leave a Comment