```import java.util.Scanner;

public class CheckSudokuSolution {
public static void main(String[] args) {

System.out.println(isValid(grid) ? "Valid solution"
: "Invalid solution");
}

/** Read a Sudoku solution from the console */
// Create a Scanner
Scanner input = new Scanner(System.in);

System.out.println("Enter a Sudoku puzzle solution:");
int[][] grid = new int[9][9];
for (int i = 0; i < 9; i++)
for (int j = 0; j < 9; j++)
grid[i][j] = input.nextInt();

return grid;
}

/** Check whether a solution is valid */
public static boolean isValid(int[][] grid) {
for (int i = 0; i < 9; i++)
for (int j = 0; j < 9; j++)
if (grid[i][j] < 1 || grid[i][j] > 9
|| !isValid(i, j, grid))
return false;
return true; // The solution is valid
}

/** Check whether grid[i][j] is valid in the grid */
public static boolean isValid(int i, int j, int[][] grid) {
// Check whether grid[i][j] is valid at the i's row
for (int column = 0; column < 9; column++)
if (column != j && grid[i][column] == grid[i][j])
return false;

// Check whether grid[i][j] is valid at the j's column
for (int row = 0; row < 9; row++)
if (row != i && grid[row][j] == grid[i][j])
return false;

// Check whether grid[i][j] is valid in the 3 by 3 box
for (int row = (i / 3) * 3; row < (i / 3) * 3 + 3; row++)
for (int col = (j / 3) * 3; col < (j / 3) * 3 + 3; col++)
if (!(row == i && col == j) && grid[row][col] == grid[i][j])
return false;

return true; // The current value at grid[i][j] is valid
}
}
```