h.java

public class Solution {
    public void solveSudoku(char[][] board) {
        int rLength = board.length;
        int cLength = board[0].length;
        List<Character> candidate = new Arraylist<Character>();
        for(int i =1; i < rLength+1, i++){
            candidate.add((char)i);
        }
        for(int i = 0; i < rLength; i++){
            for(int j = 0; j < cLength; j++ ){
                if(board[i][j] != '.'){
                    board[i][j].get()
                }
                board[i][j].get()
            }
        }
        
    }
    
  
    
    public boolean CheckValidNumber(char[][] board, int i, int j){
        
        int rLength = board.length;
        int cLength = board[0].length;
        //candidate list
        List<Character> candidate = new Arraylist<Character>();
        candidate = getCandidate(i, j);
        for(){
            
        }
        if(i == 8 && j == 8 && candidate.size() == 1){
            return true;
        }else{
            return false;
        }
    }
    
    public Arraylist<Character> getCandidate(char[][] board, int i, int j){
        //candidate list
        List<Character> candidate = new Arraylist<Character>();
        Set<Character> s = HashSet<Character>();
        //getValidCadidate,Test method
        
        
        //check
        
    }
}