43. Copying BigDecimals

• To create a BigDecimal object from another BigDecimal object, use

  
      BigDecimal total2 = new BigDecimal(total.toString());
  
  

  Notice the use of toString. When converting to/from double instead of the String, the BigDecimal often gets an unwanted (and unnecessary) high precision fractions.

• For example, a double value of 1.4 becomes

  
       double value: 1.4
         BigDecimal: 1.399999999999999911182158029987476766109466552734375
  
  

• Try to uncomment and use nextDouble method in the sample program Rounding.java to test this behavior.