Convert multidimensional arrays to strings using the deepToString() method of the Arrays class in Java

Use the deepToString() method of the Arrays class in Java to convert multidimensional arrays into strings

In Java programming, processing multidimensional arrays is a common task. When we want to convert a multidimensional array into a string, we can do it using the deepToString() method in the Arrays class. The deepToString() method can convert a multi-dimensional array into a string representation, which is convenient for us to output or debug.

In the following example, I will demonstrate how to use the deepToString() method to convert arrays of different dimensions.

First, let us define a one-dimensional array:

int[] arr = {1, 2, 3, 4, 5};

The sample code for converting a one-dimensional array to a string using the deepToString() method is as follows:

String arrString = Arrays.deepToString(arr);
System.out.println(arrString);

The output result will be: [1, 2, 3, 4, 5]

Next, we define a two-dimensional array:

int[][] matrix = {
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9}
};

Use the deepToString() method to convert the two-dimensional array The sample code for a string is as follows:

String matrixString = Arrays.deepToString(matrix);
System.out.println(matrixString);

The output result will be: [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

We can see that the deepToString() method also converts each element of the two-dimensional array into a string, ultimately forming a string representation of a multi-dimensional array.

Next, let’s look at an example of a higher-dimensional array:

int[][][] cube = {
    {
        {1, 2, 3},
        {4, 5, 6},
        {7, 8, 9}
    },
    {
        {10, 11, 12},
        {13, 14, 15},
        {16, 17, 18}
    }
};

The example code for using the deepToString() method to convert a three-dimensional array into a string is as follows:

String cubeString = Arrays.deepToString(cube);
System.out.println(cubeString);

The output result will be: [[[1, 2, 3], [4, 5, 6], [7, 8, 9]], [[10, 11, 12], [13, 14, 15] , [16, 17, 18]]]

Similarly, the deepToString() method also converts each element of the three-dimensional array into a string, ultimately forming a string representation of a multi-dimensional array.

Through these examples, we can see that it is very convenient to use the deepToString() method of the Arrays class to convert multi-dimensional arrays into strings. Whether it is a one-dimensional array, a two-dimensional array, or a higher-dimensional array, it can be implemented using the deepToString() method. This is useful both for output and debugging.

It should be noted that the deepToString() method recursively converts all elements of a multi-dimensional array into strings, so it may cause performance problems when processing large-scale multi-dimensional arrays. Therefore, in actual projects, it may be necessary to choose an appropriate conversion method according to the situation.

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