WordSearch.java

import java.util.*;
public class WordSearch {

    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 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;
    }

    public boolean addWordH (int r, int c, String word) {
	if (r>board.length || (c+(word.length()-1)>board[r].length)) {
            return false;
	}
	for (int i=0;i<word.length();i++) {
            if ((!((""+board[r][c+i]).equals("-"))) && (!((""+board[r][c+i]).equals("" + word.charAt(i))))) {
                return false;
            }
        }
        for (int i=0;i<word.length(); i++) {
            board[r][c+i] = word.charAt(i);
        }
        return true;
    }
}