How can i build and return a String that contains the elements in an array?

Question

i need an overloaded method that uses enhanced for loops to build and return a String that contains the elements in an array. This is my work:

 public static String arrayToString(double[] dblArray) {
    String str = "";
    for (double i : dblArray) {
        System.out.println(dblArray.toString());
    }
    return str;
  }

And i got output something like this:

 [D@232204a1
 [D@232204a1
 [D@232204a1
 [D@232204a1

I think this is adress of array's elements.

Answer 1

Solution

public static String arrayToString(double[] dblArray) {
    String arr = Arrays.toString(dblArray);
    String fin = arr.substring(1,arr.length()-1).replace(",", " ");
    return fin;
}

Here is a solution without using a loop.

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Input

{5.12,3.14,5.6}

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Output

5.12  3.14  5.6

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EDIT

If you also want to use a method to print a 2D array with the same technique, you'll have to use a enhanced loop like below.

Solution

public static String arrayToString(double[][] dblArray) {
        StringBuilder fin = new StringBuilder();
        for (double[] d : dblArray){
            fin.append(Arrays.toString(d).replace("[", "").replace("]", "").replace(",", " ") + "\n");
        }
        return fin.toString();
    }

Input

{{3.14,2.35}, {3.14,2.35}, {3.14,2.35}}

Output

3.14  2.35
3.14  2.35
3.14  2.35