Returning an array of double values from string

String numbers = ("5,25,77,44,64,8,55,28,86,35");

I would like to return an array of double values from the string. I am unable to do that successfully with the following code : 

public static double[] fillArray(String numbers)
{
    String[] answers = numbers.split(",");

    double[] boom = new double[answers.length];

    for (int index = 0; index < answers.length; index++)
    {
        boom[index] = Double.parseDouble(answers[index]);
    }

    return boom;
}

The error I get is quite weird...

 [De56f047c

Why is that and how do I fix it?

Jon Skeet
people
quotationmark

You're calling toString() on an array - and arrays don't override Object.toString(). So you get the behaviour from Object.toString():

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

getClass().getName() + '@' + Integer.toHexString(hashCode())

Call Arrays.toString(double[]) on the result instead and it will be fine. So this code:

double[] array = fillArray("5,25,77,44,64,8,55,28,86,35");
System.out.println(Arrays.toString(array));

... gives a result of:

[5.0, 25.0, 77.0, 44.0, 64.0, 8.0, 55.0, 28.0, 86.0, 35.0]

I really wish toString() had been overridden for all arrays. It would make life simpler...

people

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