src/main/java/com/rockagen/commons/util/Arith.java
public static double toDouble(final float f){
    	BigDecimal b = new BigDecimal(Float.toString(f));
    	return b.doubleValue();
    }
public static double toDouble(final float f){
    	BigDecimal b = new BigDecimal(Float.toString(f));
    	return b.doubleValue();
    }
public static double toDouble ( final float f ) { BigDecimal b = new BigDecimal ( Float . toString ( f ) ) ; return b . doubleValue ( ) ; }
to float
@param f float value
@return double
to float