Displaying values of Array. Getting strange values

Question

I would like to make k random points of type TockaXY. TockaXY is defined:

 public static class TockaXY {

      private float x;
      private float y;

      public TockaXY(float x, float y) { 
          this.x = x;
          this.y = y;  
      }

The function is like this:

 public static TockaXY[] randomCentri(int k, int lowerBound, int upperBound) {
       TockaXY[] arrayCentri = new TockaXY[k];
          for (int i = 0; i < k; i++) {
              float x = (float)(Math.random() * (upperBound - lowerBound) + lowerBound)/100;
              float y = (float)(Math.random() * (upperBound - lowerBound) + lowerBound)/100;
              TockaXY point = new TockaXY(x, y);
              arrayCentri[i]=point;
          }
          System.out.println(" Random centri: " + arrayCentri);
          return arrayCentri;

      }

But I get:

Random centri: [LTest$TockaXY;@6ce253f1

What am I doing wrong?

Eritrean · Accepted Answer · 2019-10-15 08:33:57Z

1

You need to add a toString method in your TockaXY class

@Override
    public String toString() {
        return "TockaXY{" + "x=" + x + ", y=" + y + '}';
}

and use Array.toString while printing

System.out.println(" Random centri: " + Arrays.toString(arrayCentri));

or use a loop to print each array element

for(TockaXY point: arrayCentri){
    System.out.println(point);
}

answered Oct 15, 2019 at 8:33

Eritrean

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Comments

don-joe · Accepted Answer · 2019-10-15 08:31:53Z

1

Right now, you only see a representation of the pointer. Java internally will call .toString() on String + Object.

Implement a toString() method in your TockaXY class and iterate over the array, transforming every entry of the array to String.

answered Oct 15, 2019 at 8:31

don-joe

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