is new a BigDecimal from another bigDecimal.toString() always equals?

Question

In Java, is new a BigDecimal from another bigDecimal.toString() always equals? For example

    BigDecimal a = new BigDecimal("1.23");
    BigDecimal b = new BigDecimal(a.toString());

    System.out.println(a.compareTo(b) == 0); // always true?

I know BigDecimal is immutable, but i want to know if there is any good way to clone a BigDecimal object?

Answer 1

Yes you can assume so. From the BigDecimal.toString docs

If that string representation is converted back to a BigDecimal using the BigDecimal(String) constructor, then the original value will be recovered.

However you can safely share the same object because it is immutable and copying is not required

Answer 2

One simple way would be to add ZERO

BigDecimal a = new BigDecimal("1.23");
BigDecimal b = a.add(BigDecimal.ZERO);