I need to put the decimal separator point in a Long, I have tried in several ways, but I need it to be dynamic since the decimal separator can change, I have tried with DecimalFormat format = new DecimalFormat("###.##"); but this is not dynamic and it doesn't work the way I wanted it to
Example 1
long amount = 123456;
int decimal = 2;
The result should be Double newAmount = 1234.56
Example 2
long amount = 123456;
int decimal = 4;
The result should be Double newAmount = 12.3456
If I understand correctly, this is what you are trying to achieve:
Long amount = 123456;
int decimal = 2;
double newAmount = amount.doubleValue();
newAmount = newAmount / Math.pow(10, decimal);
Use the pow method of java.lang.math to calculate the power of a number.
Be careful to declare your variable as an object of type Long and not a primitive type if you want to use one of its functions.
As suggested, it is even simpler to just use a double variable instead of a long from the start:
double amount = 123456;
int decimal = 2;
amount = amount / Math.pow(10, decimal);