I would like to return an array of double values from the strings. How can I do that? I have been unable to do it with the following....
public static double[] fillArray(String numbers)
{
String[] answers = numbers.split(",");
double[] boom = new double[answers];
for (int index = 0; index < answers.length; index++)
{
System.out.println(answers[index]);
}
return boom;
}
First of all you have to use length to get the length of the array.
double[] boom = new double[answers.length];
Then, inside the loop, convert the String into double.
boom[index] = Double.parseDouble(answers[index]);
Finally, use try-catch or throw exception from method for the parseDouble()
First of all double[] boom = new double[answers] doesn't make sense, since answers is an array. You want to do:
double[] boom = new double[answers.length];
for (int i = 0; i < answers.length; ++i) {
boom[i] = Double.valueOf(answers[i]);
}
in which you use Double.valueOf to convert the String to a double. Mind that the method could raise a NumberFormatException in case the string couldn't be parsed to a double.
Note that you will be soon able to do this in one line using java-8:
public static double[] fillArray(String numbers){
return Arrays.stream(numbers.split(","))
.mapToDouble(Double::parseDouble)
.toArray();
}
You need to convert each String to a double.
Which you can do with the Double(String s) constructor or parseDouble(String s)
public static double[] fillArray(String numbers)
{
double[] boom = new double[answer.length];
String[] answers = numbers.split(",");
for (int i = 0; i < answers.length; i++) {
boom[i] = Double.parseDouble(answers[i]);
}
for (int index = 0; index < answers.length; index++)
{
System.out.println(answers[index]);
}
return boom;
}
