WordSearch.java

import java.util.*;

public class WordSearch {
    private int rows, cols;
    private char[][] board;

    public WordSearch(int rows, int cols) {
	board = new char[rows][cols];
	for (int i=0;i<rows;i++) {
	    for (int j=0;j<cols;j++) {
		board[i][j]='-';
	    }
	}
	this.rows = rows;
	this.cols = cols;
    }

    public WordSearch() {
	this(20,20);
    }
    
    public boolean addWordH(int row, int col, String word){
	if(row<0||col>cols||col<0||row+word.length()>rows){
	    return false;
	}
	
	for(int i = 0; i<word.length();i++) {
	    if(board[row][col+i] != '-'&& board[row][col+i] != word.charAt(i)){
		return false;
	    }
	}
	
	for(int i = 0; i<word.length();i++) {
	    board[row][col+i] = word.charAt(i);
	}
	return true;
    }
    
    public String toString() {
	String s="";
	for (int i=0;i<board.length;i++) {
	    for (int j=0;j<board[i].length;j++) {
		s=s+board[i][j];
	    }
	    s=s+"\n";
	}
	return s;
    }

}