# Anticlockwise spiral view of diamond matrix elements in java

Java program for Anticlockwise spiral view of diamond matrix elements. Here more solutions.

``````/*
Java program for
Anticlockwise spiral view of diamond element in matrix
*/
public class SpiralTraversal
{
// Method which is displaying the Anticlockwise spiral
// Of matrix in diamond(mid) element
public void spiralView(int[][] matrix,
int x, int y, int p, int q, int k)
{
// Find the middle column
int mid_col = y + ((q - y) / 2);
// Get middle row (valid for odd square matrix)
int mid_row = mid_col;
// Matrix are divided into 4 section
// Starting of middle row and column in form of top

// Case A
// Top to Left-bottom
int i = mid_col;
int j = 0;
while (i > y && k > 0)
{
System.out.print("  " + matrix[x + j][i]);
i--;
k--;
j++;
}
// Case B
// Middle left to middle right bottom
i = y;
j = 0;
while (i <= mid_col && k > 0)
{
System.out.print("  " + matrix[(mid_row) + j][i]);
i++;
k--;
j++;
}
// Case C
// Middle bottom to middle right side
i = mid_col + 1;
j = 1;
while (i <= q && k > 0)
{
System.out.print("  " + matrix[(p) - j][i]);
i++;
k--;
j++;
}
// Case D
// Middle right side to  top middle
i = q - 1;
j = 1;
while (i > mid_col && k > 0)
{
System.out.print("  " + matrix[(mid_row) - j][i]);
i--;
k--;
j++;
}
if (x + 1 <= p - 1 && k > 0)
{
// Recursive call
spiralView(matrix, x + 1, y + 1, p - 1, q - 1, k);
}
}
public void diamondAnticlockwise(int[][] matrix)
{
int row = matrix.length;
int col = matrix[0].length;
// Check whether the given matrix is a valid odd shape or not
if (row != col || col % 2 == 0)
{
// When Yes not a valid size
System.out.println("\nNot a valid perfect Odd square matrix");
return;
}
// (row*col)-((col+1)/2)*4 are provide the value of number of
// Diamond element
spiralView(matrix, 0, 0, row - 1, col - 1,
(row * col) - ((col + 1) / 2) * 4);
}
public static void main(String[] args)
{
SpiralTraversal task = new SpiralTraversal();
// Define matrix
int[][] matrix = {
{1,  2,  3,  4,  5},
{6,  7,  8,  9,  10},
{11, 12, -1, 15,  16},
{17, 18, 19, 20,  21},
{22, 23, 24, 25,  26}
};
}
}
``````

Output

``  3  7  11  18  24  20  16  9  8  12  19  15  -1``

## Comment

Please share your knowledge to improve code and content standard. Also submit your doubts, and test case. We improve by your feedback. We will try to resolve your query as soon as possible.