How to clone a two-dimensional array of float entries to another two-dimensional array of similar type and size?

Question

I hava a problem to clone a two-dimensional array of float entries to another two-dimensional array of similar type and size. Below is my coding, anyone can help me to check which part I got wrong? Thanks.

public class Clone2Darray {
    public static int[][] clone(int[][] a) throws Exception {
        float b[][] = new int[a.length][a[0].length];

        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[0].length; j++)
                b[i][j] = a[i][j];
        }
        return b;
    }

    public static void main(String args[]) {

        float a[][]= {{1.513,2.321,3.421},{4.213,5.432,6.123},{7.214,8.213,9.213}};


        try {
            float b[][] = Clone2Darray.clone(a);
            for (int i = 0; i < a.length; i++) {
                for (int j = 0; j < a[0].length; j++) {
                    System.out.print(b[i][j] + " ");
                }
                System.out.println();
            }
        } catch (Exception e) {
            System.out.println("Error!!!");
        }
    }
}

My coding come out these errors like below:

  C:\Users\User-Win7\.netbeans\7.1\var\cache\executor-snippets\run.xml:48: 
  Cancelled by user.
  BUILD FAILED (total time: 4 seconds)

I want the output like below:

  1.513 2.321 3.421
  4.213 5.432 6.123
  7.214 8.213 9.213

  1.513 2.321 3.421
  4.213 5.432 6.123
  7.214 8.213 9.213

So what is your problem, can you put what outcome you have and what is wrong with it? — Mikhail Chibel, Oct 01 '19 at 09:52
You are using `int` arrays everywhere in your `clone` method, those need to be `float` arrays if you want to preserve the type. The current code won't compile this way. — TheWhiteRabbit, Oct 01 '19 at 09:53
if you want to clone a float array, why are you using `int[][]` in your clone method? — sinclair, Oct 01 '19 at 09:53

score 2 · Accepted Answer · answered Oct 01 '19 at 09:55

2

1 - Change method parameter from int to float.

2 - change return type from int to float.

3 - while assign float value in array use f after every number to tell compiler that its a float number.

public static float[][] clone(float[][] a) throws Exception {
    float b[][] = new float[a.length][a[0].length];

    for (int i = 0; i < a.length; i++) {
        for (int j = 0; j < a[0].length; j++) {
            b[i][j] = a[i][j];
        }
    }
    return b;
}



    float[][] a = new float[][] { { 1.513f, 2.321f, 3.421f }, { 4.213f, 5.432f, 6.123f },
            { 7.214f, 8.213f, 9.213f } };

    try {
        float b[][] = clone(a);
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[0].length; j++) {
                System.out.print(b[i][j] + " ");
            }
            System.out.println();
        }
    } catch (Exception e) {
        System.out.println("Error!!!");
    }

answered Oct 01 '19 at 09:55

SSP

2,650
5
31
49

Yup. Output can show me the float. But can't appear clone the array. – Oct 01 '19 at 10:00
But can't appear clone the array - what do you mean? – SSP Oct 01 '19 at 10:11
Mean want copy same the array – Oct 01 '19 at 14:31
It will copy same array. f notation is for compiler. it does not change or impact on any thing. – SSP Oct 01 '19 at 14:45

How to clone a two-dimensional array of float entries to another two-dimensional array of similar type and size?

1 Answers1