Format of BigDecimal number

Question

BigDecimal val = BigDecimal.valueOf(0.20);
System.out.println(a);

I want to store in val a value 0.20 and not 0.2. What I

Answer 1

BigDecimal remembers the trailing zeros - with some significant side-effect:

BigDecimal bd1 = new BigDecimal("0.20"); 
BigDecimal bd2 = new BigDecimal("0.2");

System.out.println(bd1);
System.out.println(bd2);
System.out.println(bd1.equals(bd2));

will print

0.20
0.2
false

And we need to remember, that we can't use BiGDecimal for numbers, where the decimal expansion has a period:

BigDecimal.ONE.divide(new BigDecimal(3));

will throw an exception (what partially answers your concerns in your comments)