Question

write static method in main driver class

public static int[] combineTwoToOne(int[][] number);

example DA is:

1 2 3

4 5 6

returned 1D array is 1 2 3 4 5 6

Answer 1

public static int[] combineTwoToOne(int[][] number){
  if(number!=null) {
    int count = 0;
    for(int i = 0;i<number.length;i++){
      for(int j = 0;j<number[i].length;j++){
        count += 1;
      }
    }
    int arr[] = new int[count];
    int k = 0;
    for(int i = 0;i<number.length;i++){
      for(int j = 0;j<number[i].length;j++){
        arr[k++] = number[i][j];
      }
    }
    return arr;
  }
  return null;
}