A 3D array is essentially an array of arrays of arrays: it’s an array or collection of 2D arrays, and a 2D array is an array of 1D array.

This type of array has 3 dimensions – x, y, z.

Creating a 3D array

Data_typearray_name[ ] [ ] [ ] = new array_name[x][n][m];

x = dimension (frame)number (2D array)

n = row number

m = column number

Let’s see some examples below that how we can declare a 3D array.

class const3D{
    public static void main(String[] args) {
int[][][] arr={{{10,20,30},{40,50,60},{70,80,85}}};
 
        // display 3D array
        for(inti=0;i<1;i++){
            for(int j=0;j<3;j++){
                for(int k=0;k<3;k++){
System.out.println(arr[i][j][k]);
                }
            }
        }
    }
}
output
import java.util.Scanner;
 
public class const3d_1 {
    public static void main(String[] args) {
intarr[][][]=new int[1][3][3];
inti,j,k;
        Scanner sc=new Scanner(System.in);
        for(i=0;i<1;i++){
            for(j=0;j<3;j++){
                for(k=0;k<3;k++){
System.out.println(“insert value index “+i+” “+j+” “+k+” -> “);
arr[i][j][k]=sc.nextInt();
                }
            }
        }
    }
}
output

Let’s create a 3D array of strings

import java.util.Scanner;
 
public class const3D_2 {
    public static void main(String[] args) {
        String arr[][][]=new String[1][3][3];
inti,j,k;
        Scanner sc=new Scanner(System.in);
        // reading values into index
        for(i=0;i<1;i++){
            for(j=0;j<3;j++){
                for(k=0;k<3;k++){
System.out.println(“insert value index “+i+” “+j+” “+k+” -> “);
arr[i][j][k]=sc.next();
                }
            }
        }
System.out.println(“complete string 3D array is”);
        // display values of array
        for(i=0;i<1;i++){
System.out.println();
            for(j=0;j<3;j++){
System.out.println();
                for(k=0;k<3;k++){
                   // System.out.println(“complete string 3D array is”);
System.out.print(arr[i][j][k]+”\t”);
                }
            }
        }
    }
}
output
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