float variables initialization java

Question

The following code snippet gave me compiler error at Line 1.

public abstract class xyz
{

    float Gamma = 20.0; //Line 1
    public class Alpha
    {
        v         


        

Answer 1

Per the JLS, §3.10.2, all floating point literals are interepreted as double unless specified as a float.

A floating-point literal is of type float if it is suffixed with an ASCII letter F or f; otherwise its type is double and it can optionally be suffixed with an ASCII letter D or d (§4.2.3).

Change your declaration to:

float density = 20.0f;

In general, consider why you're using float - it has less precision than double, and isn't used nearly as often.