java 静态变量初始化顺序

public class Elvis 
{
    public static final Elvis INSTANCE = new Elvis();
    private final int beltSize;
    private static final int CURRENT_YEAR =    Calendar.getInstance().get(Calendar.YEAR);
    
    private Elvis() 
{
        beltSize = CURRENT_YEAR - 1930;
    }
    
    public int beltSize() 
{
        return beltSize;
    }
    
    public static void main(String[] args) 
{
        System.out.println("Elvis wears a size " + INSTANCE.beltSize() + " belt.");
    }
}