How To Convert a UniDimensional Array to a Bidimensional Array (Java)

I already have the code for how to convert a bidimensional one into a dimensional one, but I don't know how to do it vice-versa. Here's my code:

package laboratorio9;

import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner entrada = new Scanner(System.in);
    int A[][];
    int B[];
    int n;
    int m;
    int nb = 0;

    System.out.println("Enter the number of lines in your array.");
    n = entrada.nextInt();

    System.out.println("Enter the number of columns in your array.");
    m = entrada.nextInt();

    A = new int[m][n];
    B = new int[m*n];

    for (int i = 0; i < m; i++) {
      for (int j = 0; j < n; j++) {
        System.out.println("Enter A["+i+"]["+j+"]");
        A[i][j] = entrada.nextInt();
      }
    }
    System.out.println();

    for (int i = 0; i < m;i++) {
      for (int j = 0; j < n; j++) {
        B[nb] = A[i][j];
        nb++;
      }
    }

    for (int i = 0; i < m*n; i++) {
      System.out.println(B[i] + "  ");
    }
    System.out.println();

    Boolean Swap = false;

    do {
      Swap = false;
      for (int i=0;i<B.length-1;i++)
        if (B[i] > B[i + 1]) {
          int Temp = B[i];
          B[i] = B[i + 1];
          B[i + 1] = Temp;
          Swap = true;            
        }
    } while (Swap);

    for (int i=0;i<B.length;i++)
      System.out.println(B[i]);
  }
}

From stackoverflow

• you're looking for something like:

  int j = 0;
  int k = 0;
  for ( int i = 0; i < nb;i++)
  {
      C[j][k] = B[i];
      k++;
      if( k >= n )
      {
          j++;
          k = 0;
          if( j >= m )
              throw Error();
      } 
  }
  

  which is the same as:

  int k = 0;
  for ( int i = 0; i < m;i++)
  {
      for ( int j = 0; j < n;j++)
      {
          C[i][j] = B[k++];
      }
  }
  

  but with trying to help explain the concept more.