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4 Φεβ 2015 · long result = i * 184528125; It multiplies two 32-bit int values. The result will be a 32-bit int (which has overflowed) which is then converted to a 64-bit long. You want to do 64-bit multiplication instead. Make one of the two operands a long. The easiest way to do that is to use the L suffix on the constant: long result = i * 184528125L;
The Java spec allows both upper and lower case suffixes, but the upper case version for longs is preferred, as the upper case L is less easy to confuse with a numeral 1 than the lower case l. See the JLS section 3.10 for the gory details (see the definition of IntegerTypeSuffix).
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The Long class wraps a value of the primitive type long in an object. An object of type Long contains a single field whose type is long. In addition, this class provides several methods for converting a long to a String and a String to a long, as well as other constants and methods useful when dealing with a long.
Ranges are inclusive in both ends. For more details: Java: Primitive Types. Ranges of primitive types: byte [-128..127], short [-32768..32767], int [-2147483648..2147483647], long [-9223372036854775808..9223372036854775807], float [±3.40282347×1038], double [±1.7976931348623157×10308], char [\u0000..\uFFFF], boolean [false, true].
In Java a long is a signed 64-bit integer. Long value ranges from −9,223,372,036,854,775,808 (inclusive) to 9,223,372,036,854,775,807 (inclusive).
By mastering long value ranges in Java, developers can effectively handle large numeric values, prevent overflow issues, and implement robust numeric operations. Understanding the long type's limits and practical usage ensures more reliable and precise computational strategies in Java programming.
