CODEWITHSUNDEEP
javaarraysmultidimensional-array
goldenmaza
goldenmaza

Reputation: 159

2D array rotation

I have a 2D array that I would like to flip clockwise (no, this is not a homework assignment!). I have the following output as my code tries to flip the array by creating a new temporary one.

// Original array
I/System.out: 10 11 12 13 14 
I/System.out: 15 16 17 18 19 

// Temp array
I/System.out: 10 15 
I/System.out: 11 16 
I/System.out: 12 17 
I/System.out: 13 18 
I/System.out: 14 19

What I want is for the second array (15 - 19) to be in the first column. I just do not understand what I am doing wrong.

The code is as follows:

Object[][][] containerTemp = new Object[zDim][yDim][xDim];
for (int z = 0; z < zDim; z++) {
   for (int y = yDim - 1; y >= 0; y--) {
      for (int x = 0; x < xDim; x++) {
         containerTemp[z][y][x] = container[z][x][y];
      }
   }
}

The final result of the Temp array will be correct for the purpose of the project, but I have other code that will do this part, I just want these nested for loops to "flip" the array without moving the values.

Upvotes: 0

Views: 86

Answers (1)

David P&#233;rez Cabrera
David P&#233;rez Cabrera

Reputation: 5068

Try with:

Object[][][] containerTemp = new Object[zDim][yDim][xDim];
for (int z = 0; z < zDim; z++) {
   for (int y = yDim - 1; y >= 0; y--) {
      for (int x = 0; x < xDim; x++) {
         containerTemp[z][y][xDim - (x + 1)] = container[z][x][y]; // change x target.
      }
   }

}

Upvotes: 1

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