title: printable char in java
body: <p>Does anyone knows how to detect printable characters in java?</p>
  
  <p>After a while ( trial/error ) I get to this method:</p>
  
  <pre><code>    public boolean isPrintableChar( char c ) {
          Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
          return (!Character.isISOControl(c)) &amp;&amp;
                  c != KeyEvent.CHAR_UNDEFINED &amp;&amp;
                  block != null &amp;&amp;
                  block != Character.UnicodeBlock.SPECIALS;
      }
  </code></pre>
  
  <p>I'm getting the input via KeyListener and come Ctr-'key' printed an square. With this function seems fairly enough. </p>
  
  <p>Am I missing some char here?</p>