Java how to fill array

Question

public static void main(String[] args) {

float numberF[]=new float[7];
displayF(numberF);

}

public static void displayF(float x[]) {

    int one = 1;
    double sum = 0;
    for (int row = 0; row < x.length; row++) {
        sum = Math.pow(one, 2);
        x[row] = (int) sum;

        System.out.printf("%.0f.%.0f ",x[row], x[row] );
        one++;
    }

}

This method gives me this output:

1.1 4.4 9.9 16.16 25.25 36.36 49.49

But I need the array to store the numbers above with a for loop. Now it only stores 1.0 4.0 9.0 etc...

Any suggestions of how to do it?

Answer 1

There are other more efficient ways to do it, but the easiest is just to parse what you are printing back into a float:

x[row] = Float.parseFloat(String.format("%.0f.%.0f", sum, sum));

---

As noted by SMA in the comments, this won't give an exact answer due to rounding errors. You can store the exact value if you change the array type to BigDecimal :

x[row] = new BigDecimal(String.format("%.0f.%.0f", sum, sum));