I wrote this code:

float b = 3.6;

and I get this:

Error:Unresolved compilation problem:

Type mismatch: cannot convert from double to float

Why? Whats the definition of float?

解決方案

In Java, when you type a decimal number as 3.6, its interpreted as a double. double is a 64-bit precision IEEE 754 floating point, while floatis a 32-bit precision IEEE 754 floating point. As a float is less precise than a double, the conversion cannot be performed implicitly.

If you want to create a float, you should end your number with f (i.e.: 3.6f).

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