Take different values from a String and convert them to Double Values

Question

In my code, I\'m asking the user to input three different values divided by a blank space. Then, those three different values I would like to assign them to three different

Answer 1

Try something like this:

newDimensions = JOptionPane.showInputDialog(...

newDimensions = newDimensions.trim();

String arr[] = newDimensions.split(" ");

double darr[] = new double[arr.length];

for(int i=0;i<arr.length;i++) darr[i] = Double.parseDouble(arr[i].trim());

There are still some defensive issues that can be taken. Doing a trim on your parse double is kind of critical.

Answer 2

1. Take input from user.

2. split that line using delimeter space i.e " ".

3. inside for loop change each index element to double.By using Double.parseDouble(splitted[i]);

Answer 3

Double#parseDouble(str) expects a string,and you are trying to pass a character.

try this:

newHeight = Double.parseDouble(newDimensions.subString(1));

Answer 4

You could first split the input using String.split and then parse each variable using Double.parseDouble Double.parseDouble to read them into a Double variable.

String[] params = newDimensions.split(" ");
newHeight = Double.parseDouble(params[0]);
newWidth = Double.parseDouble(params[1]);

Answer 5

Get the input, split it by a whitespace and parse each Double. This code does not sanitize the input.

        String input = "12.4 19.8776 23.3445";
        String[] split = input.split(" ");
        for(String s : split)
        {
            System.out.println(Double.parseDouble(s));
        }