如何将 float 条目的二维数组克隆到另一个类型和大小相似的二维数组？

Question

我在将一个二维浮点数组克隆到另一个数组时遇到问题类似类型和大小的二维数组。下面是我的编码，谁能帮我检查一下我哪里错了？谢谢

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!!!");
        }
    }
}

我的编码出现如下错误：

  C:\Users\User-Win7\.netbeans.1\var\cache\executor-snippets\run.xml:48: 
  Cancelled by user.
  BUILD FAILED (total time: 4 seconds)

我想要如下输出：

  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

Answer 1

1 - 将方法参数从 int 更改为 float。

2 - 将 return 类型从 int 更改为 float。

3 - 在数组中分配浮点值时在每个数字后使用 f 告诉编译器它是一个浮点数。

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!!!");
    }

如何将 float 条目的二维数组克隆到另一个类型和大小相似的二维数组？

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

java

arrays

clone

dimension