How do I check if a BigDecimal is in a Set or Map in a scale independent way?

Question

BigDecimal\'s equals() method compares scale too, so

new BigDecimal(\"0.2\").equals(new BigDecimal(\"0.20\")) // false

It\'s c

Answer 1

HashSet#contains method can't serve your requirement, it implicitly call equals method. You should iterate over Set and use compareTo method. If value is found than set a flag.

    Set set = new HashSet<>();
    set.add(new BigDecimal("0.20"));
    boolean found=false;
    for (BigDecimal bigDecimal : set) {
        if(bigDecimal.compareTo(new BigDecimal("0.2"))==0){
            System.out.println("Value is contain");
            found=true;
            break;
        }
    }
    if(found)// Use this flag for codition.