isMatch.java

public boolean isMatch(String s, String p) {
    boolean[][] T = new boolean[s.length()+1][p.length()+1];
    T[0][0] = true;
    for (int i = 1; i < T[0].length; i++) {
        if (p.charAt(i-1) == '*') {
            T[0][i] = T[0][i - 2];
        }
    }

    for (int i = 1; i < T.length; i++) {
        for (int j = 1; j < T[0].length; j++) {
            if (p.charAt(j-1) == '.' || p.charAt(j-1) == s.charAt(i-1)) {
                T[i][j] = T[i-1][j-1];
            } else if (p.charAt(j-1) == '*')  {
                T[i][j] = T[i][j - 2];
                if (p.charAt(j-2) == '.' || p.charAt(j-2) == s.charAt(i-1)) {
                    T[i][j] = T[i][j] | T[i - 1][j];
                }
            } else {
                T[i][j] = false;
            }
        }
    }
    return T[s.length()][p.length()];
}