Change a double value

[asai]

Hi,

I am building a small accounting program that I will import transactions from a downloaded bank file.
Most of my code is getting pretty good, but I have one problem:
When I import the data from the file, the amounts in the file are either positive or negative (in or out)
Now inside my program I want to make 2 transactions: One negative and one positive.
So the question is: How can i change the amount from being positive to negative or negative to positive based on the amount from the file?

[SJF]

Show us what you've got and where you're getting errors/unexpected results.

[asai]

I am not getting any results yet, because I am not sure how to do it...

Double value1 = -150.00;

If this value is negative, like this example, I would like to make a new value like this:

Double value2 = 150.00;

And vice versa....

[JBelg]

Your value * -1

will switch it from negative to positive and vice versa.

[asai]

String Amount   = textAmount.getText();
Amount = Amount.replace(" ", "");
Amount = Amount.replace(",", ".");
double amount;
        if (!"".equals(Amount))
        {
            amount = Double.parseDouble(Amount);
        }else{
            amount = 0;
        }
        
double amount2 = * -amount;

But I get an error:

illegal start of expression

[JBelg]

The *(asterisk) has to be in front of the =(equals)

// +150.00
double amount1 = 150.0;
//-150.00
double amount2 = amount1 * -1;

[asai]

String Amount   = textAmount.getText();
Amount = Amount.replace(" ", "");
Amount = Amount.replace(",", ".");
double amount;
if (!"".equals(Amount))
        {
            amount = Double.parseDouble(Amount);
        }else{
            amount = 0;
        }
        
double amount2 = amount * -1;

Work perfect. Thanks JBelg!!