how to compare doubles in java

1private static void testBdEquality() 
2{
3     BigDecimal a = new BigDecimal("2.00");
4     BigDecimal b = new BigDecimal("2.0");
5 
6     System.out.println(a.equals(b));           // false
7 
8     System.out.println(a.compareTo(b) == 0);   // true
9}