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class Password {
  public static void main(String[] args) throws IOException {
    char[] password = new char[100];	
    BufferedReader br = new BufferedReader(new InputStreamReader(
      new FileInputStream("password.txt")));

    // reads the password into the char array, returns the number of bytes read 
    int n = br.read(password);  
    // decrypt password, perform operations
    for(int i= n - 1;i >= 0;i--)  // manually clear out the password immediately after use 
      password[i] = 0;	 
    br.close();
    }
}