title: char[ ] array appending in java
body: <p>I have a character array, which is declared as <code>char[ ] array = new char[20];</code>
  Regarding this, I have the following queries:</p>
  
  <ul>
  <li><p>Is the default value at each location, '\0000' ?</p></li>
  <li><p>How do i append characters into this array ? ( like for instance, each time i ask the user to input a alphabet and i have store the alphabets in order inside the array)</p></li>
  </ul>
  
  <p>Please bear with my queries. I can easily implement these in C++, but i am new to java. Thanks in advance! </p>