BigDecimal adding wrong value

Question

I have a BigDecimal defined like this:

private static final BigDecimal sd = new BigDecimal(0.7d);

if i print it, i get the val

Answer 1

Here are three ways:

private static final BigDecimal sd = new BigDecimal("0.7");
private static final BigDecimal sd = new BigDecimal(0.7d, MathContext.DECIMAL32);
private static final BigDecimal sd = new BigDecimal(0.7d, MathContext.DECIMAL64)